Create a Table Dynamically in ASP.NET 2.0 and ASP.NET 3.5

Posted by: Suprotim Agarwal , on 4/2/2008, in Category ASP.NET
Views: 493998
Abstract: In this article, we will see how to create a table dynamically in asp.net. We will accept the number of rows and columns in the table from the user. We will then use the Page_Load() event to create the table dynamically and to save the state of the table on each postback.
I had recently received a request from a dotnetcurry.com visitor about creating a dynamic table in ASP.NET. Now there are plenty of solutions available on the net. Most of the solutions I found, advised creating a dynamic table in the Page_Init() event, since the values of controls already exist in this event and can be used after a postback occurs. However this solution works best when the number of rows and columns are fixed, and then the table is created. But what if the number of rows and columns to be created, are to be accepted from the user, at runtime? In this article, we will explore how to accept the number of rows and columns from the user, create the table in the Page_Load() event and also retain the values on postback.

 

Whenever a control is added to the page dynamically, it is not persisted by default. That is because these ‘dynamically’ added controls are not automatically added to the page view state. Remember that for a dynamic control, the viewstate is available only after the post back occurs.
Note: ViewState maintains the state of controls, not the control tree. On postbacks, the control tree has to be recreated to make use of viewstate.
To elaborate on the above statement, the page is recreated each time it is posted back to the server. In other words, a new instance of the Page class is created and the class variables are set using the values from the ViewState. However during this recreation, the dynamically created controls are no longer available and hence the values are lost in the viewstate.
To override this behavior, you need to somehow make these controls available on each postback. One way of doing so, is to override the LoadViewState() method of the page. In the LoadViewState(), the view state data that had been saved from the previous page visit is loaded and recursively populated into the control hierarchy of the Page.
Why the LoadViewState()?
When the controls are added to page, it is done quiet early in the page event cycle. Hence the LoadViewState() gives you an ideal placeholder to recreate the controls. Since the LoadViewState() method is called before the Page_Load() event, re-adding controls in this method assures that the controls can be access and manipulated by the time any event occurs on them.
Why have you chosen to create and recreate the controls on Page_Load() instead of Page_Init()?
You can create dynamic controls in either the Page_Init() or Page_Load().
However as already explained in the introduction, we would be accepting the rows and columns from the user to create the table. Since these values would be available only after the user has entered the values in the two textboxes and clicked the button to cause a postback, the best suitable place is the Page_Load().
The second reason of choosing Page_Load() over Page_Init() is that in this example, we will be setting a flag on the ViewState to determine if the dynamic table has to be recreated or not. ViewState values are available during the Page_Load() and ‘not’ during the Page_Init() event.
Let us see some code now.
Step 1: Create a new ASP.NET application. Add two textboxes (txtRows and txtCols) and a button (btnGenerate) control to the page. The two textboxes will accept the number of Rows and Columns from the user. Based on the input in the textboxes, the table will be created dynamically on the button click. Also add a container element (to position the table) and a button (btnPost) to cause a postback the second time, once the table data is manipulated.
The mark up will look similar to the following:
<body>
    <form id="form1" runat="server">
    <div>
    <div>
        Rows: <asp:TextBox ID="txtRows" runat="server" Width="30px"> </asp:TextBox> <br />
        Cols: &nbsp;<asp:TextBox ID="txtCols" runat="server" Width="30px"></asp:TextBox>
        <br />
        <br />
        <asp:Button ID="btnGenerate" OnClick="btnGenerate_Click" runat="server" Text="Generate" />&nbsp;<br /> <br />
        <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
        <br />
        <br />
    </div>
    </div>
        <asp:Button ID="btnPost" runat="server" OnClick="Button1_Click" Text="Cause Postback" />
    </form>
</body>
 
Step 2: The number of rows and columns for the table is to be taken from the user. For this purpose, we will accept the values in the Page_Load() event. We will create properties for both the rows and columns and store in the ViewState so that the data is available on the postback.
C#
// Rows property to hold the Rows in the ViewState
    protected int Rows
    {
        get
        {
            return ViewState["Rows"] != null ? (int)ViewState["Rows"] : 0;
        }
        set
        {
            ViewState["Rows"] = value;
        }
    }
 
    // Columns property to hold the Columns in the ViewState
    protected int Columns
    {
        get
        {
          return ViewState["Columns"] != null ? (int)ViewState["Columns"] : 0;
        }
        set
        {
            ViewState["Columns"] = value;
        }
    }
protected void Page_Load(object sender, EventArgs e)
    {
        // Run only once a postback has occured
        if (Page.IsPostBack)
        {
            //Set the Rows and Columns property with the value
            //entered by the user in the respective textboxes
            this.Rows = Int32.Parse(txtRows.Text);
            this.Columns = Int32.Parse(txtCols.Text);
        }
 
        CreateDynamicTable();
    }
VB.NET
' Rows property to hold the Rows in the ViewState
      Protected Property Rows() As Integer
            Get
                  If Not ViewState("Rows") Is Nothing Then
                        Return CInt(Fix(ViewState("Rows")))
                  Else
                        Return 0
                  End If
            End Get
            Set(ByVal value As Integer)
                  ViewState("Rows") = value
            End Set
      End Property
 
      ' Columns property to hold the Columns in the ViewState
      Protected Property Columns() As Integer
            Get
             If Not ViewState("Columns") Is Nothing Then
                   Return CInt(Fix(ViewState("Columns")))
             Else
                   Return 0
             End If
            End Get
            Set(ByVal value As Integer)
                  ViewState("Columns") = value
            End Set
      End Property
 
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
            ' Run only once a postback has occured
            If Page.IsPostBack Then
                  'Set the Rows and Columns property with the value
                  'entered by the user in the respective textboxes
                  Me.Rows = Int32.Parse(txtRows.Text)
                  Me.Columns = Int32.Parse(txtCols.Text)
            End If
            CreateDynamicTable()
 
 
End Sub
Observe over here that the values of the Rows and Columns properties are set only after the user enters the values and clicks the button, which causes the postback. That is the reason why we are checking against the If(Page.IsPostBack).
Step 3: On the button click, create the dynamic table as shown below. The code has been commented to help you understand.
C#
protected void btnGenerate_Click(object sender, EventArgs e)
    {
        CreateDynamicTable();
    }
 
 
    private void CreateDynamicTable()
    {
        PlaceHolder1.Controls.Clear();
 
        // Fetch the number of Rows and Columns for the table 
        // using the properties
        int tblRows = Rows;
        int tblCols = Columns;
        // Create a Table and set its properties 
        Table tbl = new Table();
        // Add the table to the placeholder control
        PlaceHolder1.Controls.Add(tbl);
        // Now iterate through the table and add your controls 
        for (int i = 0; i < tblRows; i++)
        {
            TableRow tr = new TableRow();
            for (int j = 0; j < tblCols; j++)
            {
                TableCell tc = new TableCell();
                TextBox txtBox = new TextBox();
                txtBox.Text = "RowNo:" + i + " " + "ColumnNo:" + " " + j;
                // Add the control to the TableCell
                tc.Controls.Add(txtBox);
                // Add the TableCell to the TableRow
                tr.Cells.Add(tc);
            }
            // Add the TableRow to the Table
            tbl.Rows.Add(tr);
        }
 
       // This parameter helps determine in the LoadViewState event,
       // whether to recreate the dynamic controls or not
 
       ViewState["dynamictable"] = true;
    }
 
VB.NET
Protected Sub btnGenerate_Click(ByVal sender As Object, ByVal e As EventArgs)
            CreateDynamicTable()
End Sub
 
 
      Private Sub CreateDynamicTable()
            PlaceHolder1.Controls.Clear()
 
            ' Fetch the number of Rows and Columns for the table 
            ' using the properties
            Dim tblRows As Integer = Rows
            Dim tblCols As Integer = Columns
            ' Create a Table and set its properties 
            Dim tbl As Table = New Table()
            ' Add the table to the placeholder control
            PlaceHolder1.Controls.Add(tbl)
            ' Now iterate through the table and add your controls 
            For i As Integer = 0 To tblRows - 1
                  Dim tr As TableRow = New TableRow()
                  For j As Integer = 0 To tblCols - 1
                        Dim tc As TableCell = New TableCell()
                        Dim txtBox As TextBox = New TextBox()
                        txtBox.Text = "RowNo:" & i & " " & "ColumnNo:" & " " & j
                        ' Add the control to the TableCell
                        tc.Controls.Add(txtBox)
                        ' Add the TableCell to the TableRow
                        tr.Cells.Add(tc)
                  Next j
                  ' Add the TableRow to the Table
                  tbl.Rows.Add(tr)
            Next i
 
         ' This parameter helps determine in the LoadViewState event,
         ' whether to recreate the dynamic controls or not
 
         ViewState("dynamictable") = True
      End Sub
 
Step 4: The last piece of code is to determine whether to recreate the controls based on the ViewState[“dynamictable”]. Here’s how it works. The first time the page loads, the  LoadViewState() does not execute. The ViewState[“dynamictable”] flag is initialized once the button click occurs. When the postback occurs on the second button click (btnPost), it is then that our code written for overriding the LoadViewState() runs. The base.LoadViewState() instantiates the ViewState object. We then check the value of our ViewState flag, and based on the result, re-create our Table.
C#
    // Check the ViewState flag to determine whether to
    // rebuild your table again
    protected override void LoadViewState(object earlierState)
    {
        base.LoadViewState(earlierState);
        if (ViewState["dynamictable"] == null)
            CreateDynamicTable();
    }
VB.NET
' Check the ViewState flag to determine whether to
      ' rebuild your table again
      Protected Overrides Sub LoadViewState(ByVal earlierState As Object)
            MyBase.LoadViewState(earlierState)
            If ViewState("dynamictable") Is Nothing Then
                  CreateDynamicTable()
            End If
      End Sub
That’s it. Run the code. Enter the number of Rows and Columns to be created and click the Generate button to create the table. Since the table contains textboxes in each cell, manipulate the text inside the table and hit the ‘Cause Postback’ button. Even after the postback, the values of the table control are retained.
Note: If multiple controls of the same type are created, remember to create them with the same ID's.
I hope you now have a good idea now of how to create controls dynamically. You can adopt a similar approach to create any dynamic control in your application. I hope the article was useful and I thank you for viewing it.
The entire source code of this article can be downloaded over here

This article has been editorially reviewed by Suprotim Agarwal.

Absolutely Awesome Book on C# and .NET

C# and .NET have been around for a very long time, but their constant growth means there’s always more to learn.

We at DotNetCurry are very excited to announce The Absolutely Awesome Book on C# and .NET. This is a 500 pages concise technical eBook available in PDF, ePub (iPad), and Mobi (Kindle).

Organized around concepts, this Book aims to provide a concise, yet solid foundation in C# and .NET, covering C# 6.0, C# 7.0 and .NET Core, with chapters on the latest .NET Core 3.0, .NET Standard and C# 8.0 (final release) too. Use these concepts to deepen your existing knowledge of C# and .NET, to have a solid grasp of the latest in C# and .NET OR to crack your next .NET Interview.

Click here to Explore the Table of Contents or Download Sample Chapters!

What Others Are Reading!
The History of ASP.NET – Part III (Covers ASP.NET Core)

The History of ASP.NET – Part II (Covers ASP.NET MVC)

The History of ASP.NET – Part I

ASP.NET Web API, RestSharp and Model Error Messages

Broadcast Real-Time Notifications using SignalR, KnockoutJS and SqlTableDependency

ASP.NET Web API: Passing Multiple Objects as an Input Parameters to Action Method

Was this article worth reading? Share it with fellow developers too. Thanks!
Share on LinkedIn
Share on Google+

Author
Suprotim Agarwal, MCSD, MCAD, MCDBA, MCSE, is the founder of DotNetCurry, DNC Magazine for Developers, SQLServerCurry and DevCurry. He has also authored a couple of books 51 Recipes using jQuery with ASP.NET Controls and The Absolutely Awesome jQuery CookBook.

Suprotim has received the prestigious Microsoft MVP award for ten consecutive times. In a professional capacity, he is the CEO of A2Z Knowledge Visuals Pvt Ltd, a digital group that offers Digital Marketing and Branding services to businesses, both in a start-up and enterprise environment.

Get in touch with him on Twitter @suprotimagarwal or at LinkedIn



Page copy protected against web site content infringement by Copyscape



Feedback - Leave us some adulation, criticism and everything in between!
Comment posted by Brett Spencer on Wednesday, April 16, 2008 9:05 PM
I have used this code over and over to try and get the bugs out but no matter what I do, I can not get the page to retain the controls after clicking on the "cause postback" button.  Also, I had to create an empty function for the buttonclick for button1 as I got an error first time around without doing so.  After reading the "Understanding ASP.NET View State" reference that was mentioned.  It seems to me that the controls should be rebuilt before the viewstate can load the saved information into them - somewhere in the page initialize stage.

I do not pretend to be an expert and if anything, I would call myself a beginner, so if I am missing some understanding to this process and the reason why all of the controls and information disapears when click on the "causes postback" button, I would appreciate a clearer discussion on exactly where the controls are being rebuilt as well as when the data (or state) is placed back into them.
Comment posted by Brett Spencer on Thursday, April 17, 2008 7:35 PM
I found the other error in this code...

      Protected Overrides Sub LoadViewState(ByVal earlierState As Object)
            MyBase.LoadViewState(earlierState)
            If ViewState("dynamictable") Is Nothing Then
                  CreateDynamicTable()
            End If
      End Sub

This should say:

        If Not ViewState("dynamictable") Is Nothing Then
            CreateDynamicTable()
        End If

This allows for the controls to be rebuilt and loads the saved information from viewstate back into the controls.

I tried to build the controls in OnInit() but like this articles states, it is very difficult to get the user input as a variable into the procedure in order to build the right amount of rows and columns.
Comment posted by Suprotim Agarwal on Friday, April 18, 2008 12:40 PM
Hi Brett..Thanks for the comment and pointing out the typo.You need to add the CreateDynamicTable() in the Page_Load(). I had missed it out while writing the article. I have now added the method. You do not have to change anything else.
Comment posted by bhavana on Wednesday, April 23, 2008 5:00 AM
I try to run this code in .net 2.0 with master page. but its not retaining postback value in dynamicaly created control.
Comment posted by DataBasic on Wednesday, May 14, 2008 10:30 AM
For master pages I added 'Handles Me.Load' to the Page_Load event as the following vb.net shows:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Comment posted by y2kstephen on Sunday, May 18, 2008 12:30 AM
thx a lot! this is exactly what i am looking for!
but i got a question...
after generate the rows and input something
the textboxes always rollback to default value for the FIRST postback click
but its all fine for the second or more postback clicks, the changes remained
did i do something wrong?
Comment posted by y2kstephen on Sunday, May 18, 2008 12:36 AM
thx a lot! this is exactly what i am looking for!
but i got a question...
after generate the rows and input something
the textboxes always rollback to default value for the FIRST postback click
but its all fine for the second or more postback clicks, the changes remained
did i do something wrong?
Comment posted by Suprotim Agarwal on Monday, May 19, 2008 9:16 PM
Hi,
Well that shouldn't be happening. The sample posted takes care of that.
Comment posted by Mike on Friday, May 30, 2008 6:37 PM
y2kstephen: the problem is that "ProcessPostData Second Try" fires after the Page Load on postback and resets the viewstate tracked values for the controls created during page load.  See http://yakkowarner.blogspot.com/2008/01/aspnet-dynamic-controls-and-viewstate.html
Comment posted by Francois Ward on Monday, June 2, 2008 1:06 PM
After spending much of the dawn of ASP.NET having to pull dynamically created controls, with all the issues that come with it (if you need viewstate, you have to create them in Init...but if you NEED viewstate, you need to make em on load, but then no viewstate!... exactly what this article tries to adress), I've finally come to the conclusion...

The best way to create controls dynamically on the page is to..not do it. Instead, make a custom CompositeControl, override CreateChildControl, have the properties of your control at the top level (with viewstate backing), and when a property change, set ChildControlsCreated to false, and you're set.

Fact is, -when- controls must be created or recreated "depends", and its what confuse people... what info to save, when to read it, when to create controls, what would be the consequences if I need to change the control structure... the CompositeControl base class handles all of that in a quite elegant way, and keeps your code behind cleaner. The first one is tricky to make, but once you get the philosophy behind it, everything purrs along...
Comment posted by CR on Monday, June 2, 2008 1:39 PM
Francois: That sounds interesting. Do you have any code examples of doing that?
Comment posted by Maan on Saturday, June 7, 2008 4:26 AM
Very cool. In each cell you had created textbox. What if we can give control to user to specify that what they require in a row? I think it will be more interesting...
Comment posted by Ehsan Moezzi on Monday, June 9, 2008 8:37 AM
Thank you to give it help
Comment posted by vinitha on Wednesday, June 11, 2008 8:05 AM
Hi, Good sample.
But this works only for the first time. when i again click the button the controls are not generated again. My requirement is to generate controls as many times as user clicks on the button. Please do help me in doing this.
Thanks in advance.
Comment posted by 6 on Tuesday, July 29, 2008 5:57 AM
a
Comment posted by Zeeshan Raees on Monday, August 18, 2008 5:32 AM
Nice Article thx buddy :)
Comment posted by meeran on Monday, September 15, 2008 4:50 PM
peace be upon u,
sir,
i have a doubt..
i need to add and remove table dynamically.and need to do cleint and server side validation for that.
my model is
https://20db.banner-admin.com/order/configure
how they do that.
i am a trainee in web design.i try to do like that.i not know how they did.pls teach that to me.
thanks

yours truely...
    meeran...
Comment posted by Faheem Sial on Tuesday, September 16, 2008 5:40 AM
Hi,This code was realy so helpfull for me thanx dear, could u plz guide me to access these controls values i placed a DropDownList into cell how could i access its selected index.Regards
Comment posted by Suprotim Agarwal on Tuesday, September 16, 2008 9:14 AM
meeran: Are you referring to the code when you select the banners and click continue. If yes, then create a user control with the required fields and add the user control dynamically for the no. of banners selected. I choose user controls since the banner content is the same throughout which will result in reusability

Faheem: You would need to loop through the rows and column collection of the dynamically created table. You can use FindControl from the cell or try out the cell's controls collection. I hope you have addded the DDL with an ID.

Comment posted by madankumar on Thursday, September 25, 2008 4:36 AM
Create a Table Dynamically in ASP.NET 2.0 and read excel value and pass the values into table .After editing store it to DB. Get the values from DB and pass it table again.
Comment posted by John K on Friday, November 7, 2008 6:32 PM
This is a great article and it help me out so much.  I am new at this and was wondering about how I can change the size of the text box's and also take the values that were inputed in the text and submit them to a SQL Database.  

I know how to submit them to a SQL database, but just not what the values are.  For example, textbox1.text would be the value entered in the text box.
Comment posted by John K on Friday, November 7, 2008 6:38 PM
This is a great article and it help me out so much.  I am new at this and was wondering about how I can change the size of the text box's and also take the values that were inputed in the text and submit them to a SQL Database.  

I know how to submit them to a SQL database, but just not what the values are.  For example, textbox1.text would be the value entered in the text box.
Comment posted by John K on Monday, November 10, 2008 9:51 AM
This is a great article and it help me out so much.  I am new at this and was wondering about how I can change the size of the text box's and also take the values that were inputed in the text and submit them to a SQL Database.  

I know how to submit them to a SQL database, but just not what the values are.  For example, textbox1.text would be the value entered in the text box.
Comment posted by John K on Monday, November 10, 2008 11:39 AM
This is a great article and it help me out so much.  I am new at this and was wondering about how I can change the size of the text box's and also take the values that were inputed in the text and submit them to a SQL Database.  

I know how to submit them to a SQL database, but just not what the values are.  For example, textbox1.text would be the value entered in the text box.
Comment posted by Tony on Monday, November 10, 2008 12:38 PM
Hmm, well I was able to get this code working only after removing CreateDynamicTable() from Page_Load() and putting it in OnInit(), also had to set the ID for each TextBox otherwise the value wouldn't always appear in the correct TextBox upon the restore of the values.
Comment posted by Suprotim Agarwal on Tuesday, November 11, 2008 11:56 AM
John: There are multiple ways to update values to the db.

One could be by using ExecuteNonQuery on the command object or if you are using a datasource control like SQLDataSource to fetch records, you can use the same to update values from the textbox as well

<asp:SqlDataSource ID="SqlDataSource1" runat="server" InsertCommand="INSERT INTO Customers(Name, Age) VALUES ( @Param1 , @Param2 )"
                ConnectionString="<%$ ConnectionStrings:YourConnStringName %>">
                <InsertParameters>
                    <asp:ControlParameter ControlID="TextBox1" DefaultValue="" PropertyName="Text" Name="Param1" />
                    <asp:ControlParameter ControlID="TextBox2" DefaultValue="" PropertyName="Text" Name="Param2" />
                </InsertParameters>
            </asp:SqlDataSource>

Then on the button click, call SQLDataSource1.Insert()

Tony: I have used the Page_Load for a specific purpose and have also described it in the article. Thanks for your comment though.
Comment posted by Manoj on Monday, December 29, 2008 3:32 AM
How to save the values while entering the data in dynamic table
Comment posted by Manoj on Monday, December 29, 2008 4:53 AM
How to assign a label for place holder
Comment posted by Manoj on Wednesday, December 31, 2008 4:14 AM
How to get the value from placeholder and save into the database
Comment posted by Rahul Shinde on Tuesday, January 13, 2009 5:57 AM
it is great it will help me lots
Comment posted by mathan on Thursday, January 22, 2009 5:19 AM
if any one know plz send me
Comment posted by prabhat22 on Wednesday, February 11, 2009 6:34 AM
hi
I have created table using above method.
but now iam facing problem to store the values to database.
how to accept the values from dyanmictable and send it to database.
Comment posted by hardik patel on Thursday, April 9, 2009 2:45 AM
I have used this code over and over to try and get the bugs out but no matter what I do, I can not get the page to retain the controls after clicking on the "cause postback" button.  Also, I had to create an empty function for the buttonclick for button1 as I got an error first time around without doing
Comment posted by Than Than Aye on Thursday, April 30, 2009 5:23 AM
I can not run.Errors occur CreateDynamicTabel().
Comment posted by Shrikrishna on Friday, May 8, 2009 6:51 AM
I have used this code for generating table rows dinamically.
Now i want to retrive the table values and want to insert that values into the database. how can i get all the values when am clicking save button ? Help me plz....
Comment posted by ynnorj on Friday, June 12, 2009 4:10 AM
I also have a problem retrieving values per textbox. But the textbox created are not <asp:textbox> (or are they?);
and if I pull up the data from each textbox, I also need to assign each a different Id. But if I assign them IDs, the Ids wouldn't be recognized as well because they are set as local variables.

Aren't there no textbox arrays where we could just simply search for the variablename[index]? Thank you.
Comment posted by Aarathy Kulathunkal on Thursday, July 23, 2009 12:47 AM
It was very useful for me. I could create dynamic table...Thank you soooo much.
Comment posted by DST on Wednesday, August 5, 2009 2:54 PM
Hi, it's very useful and I was able to create a dynamic table & keeping it's earlier state using the 'LoadViewState'....But 'Page.PreviousPage' is not working when I call thru the LoadViewState. Pls check below code and let me know what I am doing wrong or way to fix it !!!
------------------------------------------------------------------------------------
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
  If Not Page.IsPostBack Then
      CreateDynamicTable() '--- It's working fine at page load...
  End If
end sub
----------------------------------------------------------------------------
Protected Overrides Sub LoadViewState(ByVal earlierState As Object)
   MyBase.LoadViewState(earlierState)
   If Not ViewState("dynamictable") Is Nothing Then
      CreateDynamicTable() '--- It's failed to find a previous page...
   End If
End Sub
--------------------------------------
Protected Sub CreateDynamicTable()
    Dim previousPageTable as Table = CType(Page.PreviousPage.FindControl("TBL"), Table)  
     'It's not finding the previouspage when this method was called from 'LoadViewState'.
   ....
   ....
   ....
  ViewState("dynamictable") = True
end sub
Comment posted by Sinu on Thursday, October 15, 2009 3:31 AM
How can i insert the data in the dynamic table to sql server table using c# please help thanx in advance
Comment posted by msk on Tuesday, October 27, 2009 12:57 PM
Hi, thanks for this article, can you please tell me how to reterive the data from each textbox , I want to store back in the database..

Thanks
MSK
Comment posted by Bhavan on Tuesday, November 24, 2009 1:32 AM
Hi, Thanks for the article. But as I am newbie, unable to run the codes successfully and getting the 'Button1_Click' is not a member of 'ASP.default_aspx' error message. I found that nothing is there in the article for button1_click event. Please provide the code so that the created table to display on the page.
Thanks, Bhavan
Comment posted by Suprotim Agarwal on Tuesday, November 24, 2009 4:36 AM
Bhavan: Just double click on the Button and it will generate the code behind for the button click. It's there to simply cause a postback.

Comment posted by Bhavan on Tuesday, November 24, 2009 6:28 AM
Hi Suprotim,
Thanks for your immediate reply.
But I didn't get any result while giving any values and clicking on generate table. Even nothing returned clicking on cause postback. Please suggest.

Bhavan  
Comment posted by chaithu on Thursday, December 10, 2009 2:31 AM
Thanks for your immediate reply.
But I didn't get any result while giving any values and clicking on generate table. Even nothing returned clicking on cause postback. Please
Comment posted by Luca on Monday, December 14, 2009 11:59 AM
hi Suprotim, Thanks for the article, it's been really helpfull. Unfortunatelly i have the same trouble as  y2kstephen  : "the textboxes always rollback to default value for the FIRST postback click
but its all fine for the second or more postback clicks, the changes remained ". What should i do with it?? You answered him that the code should take care of that case too but i can't solve the problem.... Please suggest.
Comment posted by vikky on Thursday, January 28, 2010 5:06 AM
Good,but my question is that how to save dynamic generated table in to database.
Comment posted by fazail on Tuesday, February 2, 2010 4:50 AM
i have used it butr iit is uncompled
Comment posted by Jafar on Tuesday, February 2, 2010 7:02 AM
It’s a good program; however I am interested to find out how to transfer these tables into a database “as per previous commenter”.
Comment posted by Dharmeshwari on Wednesday, February 10, 2010 11:56 PM
This article is very good for understanding both the concept and as well as the implementation. I worked it out. Also i was struggling for this code in the net for long time... it helped me a lot... Thakn u so much....
Comment posted by simflex on Wednesday, March 10, 2010 1:30 PM
This is an absolute mastermind. I looked for this solution for a long time till now.

Thank you very, very much.

I just have one question though. If I don't want the text on the boxes after they are created like: RowNo:0 ColumnNo: 0,  RowNo:0 ColumnNo: 1,RowNo:0 ColumnNo: 2..., how do I get rid of them?

Again, great work; thanks
Comment posted by simflex on Wednesday, March 10, 2010 2:07 PM
This is an absolute mastermind. I looked for this solution for a long time till now.

Thank you very, very much.

I just have one question though. If I don't want the text on the boxes after they are created like: RowNo:0 ColumnNo: 0,  RowNo:0 ColumnNo: 1,RowNo:0 ColumnNo: 2..., how do I get rid of them?

Again, great work; thanks
Comment posted by Simflex on Tuesday, March 16, 2010 11:48 AM
Does anyone know how to *not* show those text on the boxes once the columns and rows are created?

As you know once the number of rows and columns are created, you see text such as RowNo:0 ColumnNo: 0; RowNo:0 ColumnNo: 1; RowNo:0 ColumnNo: 2, etc.

I want to either hide them or remove them from displaying on the cells.

Thanks a for quick reponse on this.
Comment posted by Sudipto on Wednesday, March 17, 2010 2:58 AM
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.IsPostBack)
        {
            this.Rows = Int32.Parse(TextBox1.Text);
            //I am getting "System.FormatException: Input string was not in a correct format." on the above line

        }
        generate_table(); //my version of CreateDynamicTable()  
    }

I am using your code in a content page which has a page template.
Comment posted by Naveen on Tuesday, April 20, 2010 5:54 AM
How to get these text box values
Comment posted by surzo4368 on Monday, May 3, 2010 4:18 AM
i try this but table not generated just page refresh. help...
Comment posted by zhugw519 on Wednesday, May 12, 2010 3:35 AM
It's very useful to me,thanks a lot!
Comment posted by jia on Saturday, June 5, 2010 7:10 AM
I want to save the contents of a webpage in a database table by using a Htmleditor. Contents of htmleditor are saved in database in form of htmlcode. I am able to successfully save data in database but i am unable to retrieve the saved data back in form of designed webpage.

The data on this page is retrieve from database table field. Table has fields like id, title, detail. title field has title of a page, detail field has complete detail of a web page which is save in database in the form of htmlcode. The problem is that how a web page is designed from this, how I am show these contents in detail section of a asp.net masterpage.
I am using sqlserver and asp.net with vb not C#.

Anyone help me.
Thanks in advance
Comment posted by tejender on Friday, June 11, 2010 7:12 AM
nice
Comment posted by Saif on Wednesday, June 16, 2010 3:06 AM
You have done a nice work! thanks for sharing, i just wanted to know that how could i get the values of the text boxes after clicking the Cause Postback button suppose i inserted data into the text boxes????
Please i need your urgent help!

regards
Comment posted by Abhinesh Rao on Monday, June 28, 2010 6:14 PM
Hi Suprotim,

I just wanted to know how do I create the tables dynamically, when I enter a number either in the ROW or the COLUMN field it starts loading and then I am not able to enter value in the other field(ROW/COLUMN) which results in a null exception.

Thanks for your kind help
Comment posted by Prashant on Monday, July 19, 2010 6:59 AM
Hi Suprotim,

Thanks for this great article i wanted the exact code ,but i wasn't successful in getting the result as u said, i'm having problem maintaining the viewstate ,once clicked on cause post back the textboxes return to their default value.
Hope you reply soon
Thanks & Regards


  
Comment posted by Camilo Torregroza on Wednesday, July 21, 2010 4:53 PM
Hi thank you  for your post.

I'm trying to add a dropdownlist, a textbox and a button the dropdownlist will display some products list, and the button it's for delete the entire row.

also I have a button to add new rows to the table but it's out of the table.
when I'll try to add more than twice a row i had an exception:
I'll appreciate if you can help me with this. thank you.
this is my code if you could help me.
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="ControlAgregarProducto.ascx.cs"
    Inherits="ClienteWeb.Controls.ControlAgregarProducto" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<style type="text/css">
    .style1
    {
        height: 23px;
        width: 157px;
    }
    .style2
    {
        width: 157px;
    }
    .style3
    {
        height: 23px;
        width: 104px;
    }
    .style4
    {
        width: 104px;
    }
</style>
<%--<asp:UpdatePanel>
    <ContentTemplate>--%>
<table style="width: 100%" title="Stems">
    <tr>
        <td class="style1">
        </td>
        <td class="style3">
        </td>
        <td style="height: 23px; width: 263px">
        </td>
        <td style="height: 23px; width: 263px">
            &nbsp;
        </td>
    </tr>
    <tr>
        <td class="style2">
            Product
        </td>
        <td class="style4">
            &nbsp;
        </td>
        <td style="width: 263px">
            Quantity
        </td>
        <td style="width: 263px">
            &nbsp;
        </td>
    </tr>
    <tr>
        <td colspan="4">
            <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
        </td>
    </tr>
    <tr>
        <td class="style2">
            &nbsp;
        </td>
        <td class="style4">
            &nbsp;
        </td>
        <td style="width: 263px">
            &nbsp;
        </td>
        <td style="width: 263px">
            &nbsp;
        </td>
    </tr>
    <tr>
        <td class="style2">
            <strong>Total</strong>
        </td>
        <td class="style4">
            &nbsp;
        </td>
        <td style="width: 263px">
            [<asp:Button ID="btnAdd" runat="server" BackColor="White" BorderColor="White" BorderStyle="None"
                Text="Add" Font-Bold="True" Height="15px" OnClick="btnAdd_Click" />
            ]
        </td>
        <td style="width: 263px">
            &nbsp;
        </td>
    </tr>
</table>
<%--    </ContentTemplate>
</asp:UpdatePanel>--%>

___________
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using FF.ClienteWebBL;

namespace ClienteWeb.Controls
{
    public partial class ControlAgregarProducto : System.Web.UI.UserControl
    {
        protected int Rows
        {
            get
            {
                return ViewState["Rows"] != null ? (int)ViewState["Rows"] : 0;
            }
            set
            {
                ViewState["Rows"] = value;
            }
        }

        protected int Columns
        {
            get
            {
                return ViewState["Columns"] != null ? (int)ViewState["Columns"] : 0;
            }
            set
            {
                ViewState["Columns"] = value;
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            // Run only once a postback has occured
            if (!Page.IsPostBack)
            {
                //Set the Rows and Columns property with the value
                //entered by the user in the respective textboxes
                this.Rows = 1;
                this.Columns = 3;
                this.EnableViewState = true;
                
            }

            CreateDynamicTable();
        }

        protected void btnAdd_Click(object sender, EventArgs e)
        {
            this.Rows += 1;
            CreateDynamicTable();
            
        }

        private void CreateDynamicTable()
        {
            PlaceHolder1.Controls.Clear();

            // Fetch the number of Rows and Columns for the table
            // using the properties
            int tblRows = Rows;
            int tblCols = Columns;
            // Create a Table and set its properties
            Table tbl = new Table();
            // Add the table to the placeholder control
            PlaceHolder1.Controls.Add(tbl);
            // Now iterate through the table and add your controls
            ProductoFacade facadeProducto = new ProductoFacade();

            
            for (int i = 0; i < tblRows; i++)
            {

                TableRow tr = new TableRow();
                TableCell tCell1 = new TableCell();
                DropDownList ddlProducto = new DropDownList();
                ddlProducto.DataSource = facadeProducto.GetEspecies();
                ddlProducto.DataTextField = "Nombreingles";
                ddlProducto.DataValueField = "Idespecie";
                ddlProducto.DataBind();

                tCell1.Controls.Add(ddlProducto);
                TableCell tEmptyCell2 = new TableCell();
                
                TableCell tCell3 = new TableCell();
                TextBox txtQuantity = new TextBox();

                TableCell tCell4 = new TableCell();
                Button btnDeleteProducto = new Button();
                
                //btnDeleteProducto.BorderStyle = BorderStyle.None;
                //btnDeleteProducto.BorderColor = System.Drawing.Color.White;
                //btnDeleteProducto.Text = "Delete";
                //btnDeleteProducto.Click += new EventHandler(btnDeleteProducto_Click);
                tCell3.Controls.AddAt(0,txtQuantity);
                tCell4.Controls.AddAt(0,btnDeleteProducto);

                tr.Cells.Add(tCell1);
                tr.Cells.Add(tEmptyCell2);
                tr.Cells.Add(tCell3);
                tr.Cells.Add(tCell4);

                tbl.Rows.Add(tr);
            }

            // This parameter helps determine in the LoadViewState event,
            // whether to recreate the dynamic controls or not
            ViewState["dynamictable"] = true;
        }

        void btnDeleteProducto_Click(object sender, EventArgs e)
        {
            Control boton = (Control)sender;
            
        }

        protected override void LoadViewState(object earlierState)
        {
            base.LoadViewState(earlierState);
            if (ViewState["dynamictable"] == null)
                CreateDynamicTable();
        }
    }
}
The exception is :

Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
I hope you could help mw with this..

Comment posted by gourav on Friday, October 1, 2010 9:22 PM
hiiiii i am trying to connect a table from database to my web form,
can u please help me,
i am not able to display the table in the form
Comment posted by DD on Tuesday, October 19, 2010 5:09 AM
Hi, Can you tell me how to retrive textbox values if I am dynamically creating a table that contains a textbox in each cell( textbox are also dynamically created). The table is put in a placeholder control. I am using above createDynamicTable() for creating my table ? plz rply its urgent .....Thanks in advance.
Comment posted by erum on Friday, November 19, 2010 4:53 AM
i created div like this
Protected Sub RadioButtonList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadioButtonList1.SelectedIndexChanged


        Dim index As Integer

        For index = 1 To RadioButtonList1.SelectedValue

            Dim newdiv As New HtmlGenericControl("div")
            newdiv.ID = "mydiv" & index
            'newdiv.Attributes.Add("id", "mydiv")

            newdiv.EnableViewState = True
            Dim ht As New HtmlTable()
            ht.ID = "mytable" & index.ToString()
            ht.EnableViewState = True

            ht.Width = "100%"
            ht.CellSpacing = "0"
            ht.CellPadding = "0"
            ht.Border = 0


            Dim htr, htr1, htr2 As New HtmlTableRow()
            Dim cell, htc, htc1, htc2, htc3, htc4, htc5, htc6, htc7, htc8 As New HtmlTableCell()

            Dim name_tb As New TextBox()
            Dim sal_ddl As New DropDownList

            'validator
            Dim name_req As New RequiredFieldValidator
            Dim tel_req As New RequiredFieldValidator
            Dim email_req As New RequiredFieldValidator


            name_tb.ID = "name_tb" & index
            sal_ddl.ID = "sal_ddl" & index
            name_req.ID = "name_req" & index
            tel_req.ID = "tel_req" & index
            email_req.ID = "email_req" & index
            name_tb.EnableViewState = True
            sal_ddl.EnableViewState = True
            tel_req.EnableViewState = True

            sal_ddl.Items.Add("MR")
            sal_ddl.Items.Add("Ms")
            sal_ddl.Items.Add("Mrs")



            Dim Tel_tb1 As New TextBox
            Tel_tb1.ID = "Tel_tb1" & index
            Tel_tb1.EnableViewState = True
            name_tb.TextMode = TextBoxMode.SingleLine

            Dim email_tb1 As New TextBox
            email_tb1.ID = "email_tb1" & index
            email_tb1.TextMode = TextBoxMode.SingleLine

            htc.InnerText = "Name : "
            htc.Width = "20%"
            htc.Align = "Left"


            htc1.Controls.Add(sal_ddl)
            htc1.Width = "10%"

            htc2.Width = "70%"
            htc2.Align = "left"



            htc2.Controls.Add(name_tb)
            htc2.Controls.Add(name_req)
            htr.Controls.Add(htc)
            htr.Controls.Add(htc1)
            htr.Controls.Add(htc2)


            ht.Controls.Add(htr)
            name_req.ControlToValidate = "name_tb" & index
            name_req.Display = ValidatorDisplay.Dynamic
            name_req.ErrorMessage = ("Please Enter name of attendenes")


            'make 2nd  row

            htc3.InnerText = "Telephone : "
            htc3.Width = "20%"
            htc3.Align = "Left"


            htc4.InnerHtml = "<strong></strong>"
            htc4.Width = "10%"

            htc5.Width = "70%"
            htc5.Align = "left"

            htc5.Controls.Add(Tel_tb1)
            htc5.Controls.Add(tel_req)
            htr1.Controls.Add(htc3)
            htr1.Controls.Add(htc4)
            htr1.Controls.Add(htc5)


            ht.Controls.Add(htr1)

            tel_req.ControlToValidate = "Tel_tb1" & index
            tel_req.Display = ValidatorDisplay.Dynamic
            tel_req.ErrorMessage = ("Please Enter Phone")


            'make 3rd  row

            htc6.InnerText = "Email : "
            htc6.Width = "20%"
            htc6.Align = "Left"


            htc7.InnerHtml = "<strong></strong>"
            htc7.Width = "10%"

            htc8.Width = "70%"
            htc8.Align = "left"

            htc8.Controls.Add(email_tb1)
            htc8.Controls.Add(email_req)
            htr2.Controls.Add(htc6)
            htr2.Controls.Add(htc7)
            htr2.Controls.Add(htc8)

            ht.Controls.Add(htr2)

            email_req.ControlToValidate = "email_tb1" & index
            email_req.Display = ValidatorDisplay.Dynamic
            email_req.ErrorMessage = ("Please Enter Email")

            'Add  a blank rows

            cell.ColSpan = 3
            cell.InnerHtml = "<br/>"
            Dim row As New HtmlTableRow
            row.Cells.Add(cell)
            ht.Rows.Add(row)

          

            newdiv.Controls.Add(ht)

            newdiv.Attributes.Add("table", "ht")



            newdiv.Attributes.Add("Style", "border-bottom :#ccc solid 0px")
            newdiv.Attributes.Add("style", "height:23px")
            newdiv.Attributes.Add("style", "padding-left:20px")


            newdiv.EnableViewState = True
            ViewState("control") = "newdiv"
            Me.PlaceHolder1.Controls.Add(newdiv)
            PlaceHolder1.EnableViewState = True
            

        Next
        ViewState("count") = RadioButtonList1.SelectedValue
        'ViewState("control") = Me.PlaceHolder1




        'End Sub


    End Sub

i created  controls and div dynamically on post back in loop,and then i need to get the controls and div on submit button

i put all these controls and div in placeholders while creating them.


submit button()


for i =0 i< 3 ;i++
// i got placeholder that i have on .aspx page

// need help here  for div and dynamic controls

next
end sub

Comment posted by Lalit Sharma on Monday, November 29, 2010 6:07 AM
It was a good article and thanks for sharing.
Comment posted by Mark Fowler on Tuesday, January 4, 2011 12:56 AM
I am not sure why are developers facing an error. Just d/l the source code and run it. I was able to test the example successfully! Oh Devs!
Comment posted by B.Sharmila on Friday, January 7, 2011 10:12 PM
My project is i've to get the column names from the textbox and on the click of the button have to create table dynamically and store in the database after tat edition,deletion should be possible.Please help me for tis and mail me soon.
Comment posted by B.Sharmila on Friday, January 7, 2011 10:14 PM
how to create textbox on click of the button dynamically in vb.net
Comment posted by B.Sharmila on Friday, January 7, 2011 10:17 PM
get the table name in a textbox and display that table structure(column name and datatype) from the database in the concole using swings.
Comment posted by Manushi on Thursday, January 20, 2011 4:25 AM
In my project , there is an xml file with 2 tables each one is having 96 columns.Now I need to dynamically generate a control to display exact number of rows and columns populating data from an xml file in C#.Please look on this.Thanks in advance.
Comment posted by sivakumar on Friday, January 28, 2011 6:53 AM
<Triggers>
                        <asp:AsyncPostBackTrigger ControlID="BTNCLOSE" EventName="click"  />
                        <%--<asp:AsyncPostBackTrigger ControlID="NEWROW" Eventname="click"/>--%>
</Triggers>

in my project i am using asp.net. for dynamically add a row in a table i can add the rows. but thats not getting refresh. if i reopened the table the new row is appearing. when i using this triggers the row is not added. please look on this. Thanks in advance.
Comment posted by archana on Friday, April 29, 2011 2:05 AM
// Create column 2

TableCell td2 = new TableCell();
CalendarExtender CL2 = new CalendarExtender();
CL2.ID = "Call1";
//TextBox _text = new TextBox();
//_text.ID = "txt1";
// Add control to the table cell
td2.Controls.Add(CL2);
TableCell td3 = new TableCell();
DropDownList _ddl=new DropDownList();
_ddl.ID = "ddlPrime";
_ddl.Width=120;

// Add control to the table cell
td3.Controls.Add(_ddl);
TableCell td4 = new TableCell();
DropDownList _ddl1 = new DropDownList();
_ddl1.ID = "ddlOfficer";
_ddl1.Width = 120;

// Add control to the table cell
td4.Controls.Add(_ddl1);
TableCell td5 = new TableCell();
DropDownList _ddl2 = new DropDownList();
_ddl2.ID = "ddlRanking";
_ddl2.Width = 120;
_ddl2.Items.Add("Low");
_ddl2.Items.Add("Medium");
_ddl2.Items.Add("Hot");
// Add control to the table cell
td5.Controls.Add(_ddl2);
// Add cell to the row
tr.Cells.Add(td1);
tr.Cells.Add(td2);
tr.Cells.Add(td3);
tr.Cells.Add(td4);
tr.Cells.Add(td5);
// Add row to the table.
ttt.Rows.Add(tr);
}


Comment posted by kamiran on Thursday, May 12, 2011 3:16 AM
Hi.. nice article. i was wondering if you could help with paging for the table. i am using a similar code and i am facing
a problem when it is many rows to create. i am using the tabcontainer and when i have many rows the page is getting ugly.. ;-)
Comment posted by kamiran on Thursday, May 12, 2011 4:19 AM
Hi.. nice article. i was wondering if you could help with paging for the table. i am using a similar code and i am facing
a problem when it is many rows to create. i am using the tabcontainer and when i have many rows the page is getting ugly.. ;-)
Comment posted by jeya on Tuesday, June 7, 2011 1:55 AM
how to store values in dynamically create textbox in the database usig c# coding.
Comment posted by srinivasan on Monday, August 22, 2011 2:41 AM
as of now ok.. good working i ned how to insert the values in the textbox to the database
Comment posted by Mohd Shoeb on Saturday, November 19, 2011 6:55 AM
these all examples are good but not completing the actual requirement...
The requirement is that
First create dynamic columns in gridview and add in gridviews cells textbox dynamically then onpagepostback get the value of textbox that is written by user on pageload
if any one is able to do that or have any code so please mail me on mohammad.shoeb@deft.in because i am in trouble this time. I have already spent 3 days on it but each time failed
Thanx a lot u all......
Comment posted by Shaun on Saturday, November 19, 2011 2:11 PM
Thanks! Helped me plenty!
Comment posted by Steve on Sunday, November 20, 2011 8:51 PM
Hi
I've modified your code to enable me to initially set up the table to display one row and then I can add a row.  This works fine.  I can also click a Post button to cause a refresh that retains the values upon refresh.  But if I enter a value into one of the textboxes and then hit the add button to add a row, the table add a new row but doesn't retain the value.  Code is:

<div>
<div>
    Rows: <asp:TextBox ID="txtRows" runat="server" Width="30px"> </asp:TextBox> <br />
    Cols: &nbsp;<asp:TextBox ID="txtCols" runat="server" Width="30px"></asp:TextBox>
    <br />
    <br />
    <asp:Button ID="AddRow" runat="server" Text="Add Row" />&nbsp;
   <asp:Button ID="DeleteRow" runat="server" Text = "Delete Row" />&nbsp;<br /> <br />
    <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
    <br />
    <br />
</div>
</div>
    <asp:Button ID="btnPost" runat="server" Text="Cause Postback" />

Public Class _Default
    Inherits System.Web.UI.Page

' Rows property to hold the Rows in the ViewState
Protected Property Rows() As Integer
            Get
                  If Not ViewState("Rows") Is Nothing Then
                        Return CInt(Fix(ViewState("Rows")))
                  Else
                        Return 0
                  End If
            End Get
            Set(ByVal value As Integer)
                  ViewState("Rows") = value
            End Set
End Property
' Columns property to hold the Columns in the ViewState
Protected Property Columns() As Integer
            Get
             If Not ViewState("Columns") Is Nothing Then
                   Return CInt(Fix(ViewState("Columns")))
             Else
                   Return 0
             End If
            End Get
            Set(ByVal value As Integer)
                  ViewState("Columns") = value
            End Set
End Property
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        if Not Page.IsPostBack
         Me.Rows = 1
         Me.Columns = 1
      End If
      CreateDynamicTable()

End Sub
Private Sub CreateDynamicTable()

      Dim tblRows As Integer
      Dim tblCols As Integer
      PlaceHolder1.Controls.Clear()

        ' Fetch the number of Rows and Columns for the table using the properties
      tblRows = Rows
        tblCols = Columns
        Dim tbl As New Table
        tbl.ID = "Table1"
        PlaceHolder1.Controls.Add(tbl)

        for i As Integer = 0 to tblRows - 1

            Dim row As New TableRow
            for j As Integer = 0 to tblCols - 1
                Dim cell As New TableCell

            Dim element1 As New Label

            element1.ID = "Blank_Label_" + CStr(i) + "Col_" + CStr(j)
            element1.Text = ""
            element1.Width = "94"
                        
                Dim element2 As New TextBox

                element2.ID = "From_TextBoxRow_" + CStr(i) + "Col_" + CStr(j)
            element2.Width = "150"

            Dim element3 As New Label
            
            element3.ID = "To_Label_" + CStr(i) + "Col_" + CStr(j)
            element3.Text = " to "

            Dim element4 As New TextBox
            
            element4.ID = "To_TextBoxRow_" + CStr(i) + "Col_" + CStr(j)
            element4.Width = "150"

            Dim element5 As New CheckBox
            element5.ID = "Delete_TextBoxRow_" + CStr(i) + "Col_" + CStr(j)
            element5.Checked = False
      
                cell.Controls.Add(element1)
            cell.Controls.Add(element2)
            cell.Controls.Add(element3)
            cell.Controls.Add(element4)
            cell.Controls.Add(element5)
            
                row.Cells.Add(cell)

            tbl.Rows.Add(row)
         Next
      Next

         ' This parameter helps determine in the LoadViewState event,
         ' whether to recreate the dynamic controls or not

      ViewState("dynamictable") = True      
End Sub
Protected Sub AddRow_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles AddRow.Click

        Me.Rows = Me.Rows + 1
      CreateDynamicTable()

End Sub

' Check the ViewState flag to determine whether to rebuild your table again
      Protected Overrides Sub LoadViewState(ByVal earlierState As Object)
            MyBase.LoadViewState(earlierState)
            If ViewState("dynamictable") Is Nothing Then
                  CreateDynamicTable()
            End If
      End Sub

End Class

Can you help resolve?

Thanks
Comment posted by MAnu on Wednesday, January 11, 2012 5:02 AM
Excellent work . Thanks a lot. :)
Comment posted by Krish on Wednesday, June 13, 2012 2:27 AM
Hi All,
Can i access dynamic control value after postback which is in placeholder ?? need yr help
Comment posted by dddddddd on Monday, July 2, 2012 4:05 PM
mm
Comment posted by RNE on Tuesday, August 21, 2012 1:25 PM
Very helpful. Many thanks!
Comment posted by Tamanna Mehrotra on Sunday, August 26, 2012 7:31 AM
m very thankful to u that ur code has solved my very big problem....thank u very much.
Comment posted by Fernando R. Strijeski on Thursday, September 13, 2012 6:17 AM
Hi,

The same problem that: Krish.

"Can i access dynamic control value after postback which is in placeholder ?? need yr help"

Well, I put in page just object asp table, with "EnableViewState = True"
but I insert the rows and cells dinamically by a Button, using AJAX.

The problem: In other button, this objects aren't recognized.

What I do, pls???

Comment posted by sudhakar on Thursday, March 14, 2013 11:34 PM
nice information it useful to any one easyly understanding thank u so much
Comment posted by sudhakar on Thursday, March 14, 2013 11:39 PM
i want code in asp.net the runtime textboxes will disply and chekboxes also then user click the chek box the textboxes will be highlet otherwise invisible(after click the chekboxe the text will be visible)
pls send the code as early as possible thanking u sir
Comment posted by vipasha on Tuesday, July 16, 2013 1:15 AM
It is a great article and very well explained. I also want to know how to bind data from SQL Server database table into this dynamically generated table.
I actually want to use this concept to display data from database.
Comment posted by Manoj Bawane on Sunday, September 22, 2013 10:38 AM
fantastic article... thanks Suprotim,
But can we create this dynamic table into specific div control?
how can div referenced to .cs file? I tried but failed. plz suggest some suggestions..
Comment posted by AIS on Thursday, July 3, 2014 8:37 PM
Does anybody now how to get the text data from the control. ? I try with row(x).findcontrol(xcontrol) and it does works.
Featured Tools

Categories

JOIN OUR COMMUNITY

51,659 fans 7,923 followers 106,812 subscribers

POPULAR ARTICLES

Tags

ASP.NET MVC ASP.NET Core ASP.NET SharePoint Design Patterns C# LINQ WPF WCF Visual Studio VSTS & TFS Azure Entity Framework Angular.js React.js jQuery JavaScript HTML5 .NET Core .NET Framework

JQUERY COOKBOOK

jQuery CookBook