How to add a Web server or HTML server controls (such as CheckBox) to the template in GridView and bind the controls to a data source.

How to add a Web server or HTML server controls (such as CheckBox) to the template in GridView and bind the controls to a data source.

Normally, We can add a Web server or HTML server controls to the template in GridView control,just like the Code 1
I hope to do the same thing by programming (just like the Code 2), but I can ony add the BoundField,
I don't know how to add a CheckBox control to the template in GridView , could you help me?

//--------------------------------------------Code 1------------------------------------------------------------
<asp:GridView AutoGenerateColumns="False" DataKeyNames="CustomerID" DataSourceID="SqlDataSource1" ID="GridView1" runat="server">
             <input id="CustomerID" type="checkbox" runat="server" value='<%# Eval("CustomerID") %>' />

       <asp:BoundField DataField="CompanyName" HeaderText="CompanyName" SortExpression="CompanyName"/>
       <asp:BoundField DataField="ContactName" HeaderText="ContactName" SortExpression="ContactName"/>
//--------------------------------------------Code 1------------------------------------------------------------


//--------------------------------------------Code 2------------------------------------------------------------
            BoundField a1 = new BoundField();
            a1.DataField = "Id";
            a1.HeaderText = "Id";
            a1.SortExpression = "Id";
            a1.Visible = false;

            BoundField a2 = new BoundField();
            a2.DataField = "Title";
            a2.HeaderText = "Title";
            a2.SortExpression = "Title";


//--------------------------------------------Code 2------------------------------------------------------------

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You can create and add controls in the RowCreated Event. I have copied an example from the VS 2005 Help files and modified it slightly. You will need to figure out how to persist state through roundtrips, as these controls are recreated on every PostBack. A better solution would perhaps be to hide/show Controls/Columns depending on scenario.

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<script runat="server">

void CustomersGridView_RowCommand(Object sender, GridViewCommandEventArgs e)


// If multiple buttons are used in a GridView control, use the

// CommandName property to determine which button was clicked.

if (e.CommandName == "Add")


// Convert the row index stored in the CommandArgument

// property to an Integer.

int index = Convert.ToInt32(e.CommandArgument);

// Retrieve the row that contains the button clicked

// by the user from the Rows collection.

GridViewRow row = CustomersGridView.Rows[index];

// Create a new ListItem object for the customer in the row.

ListItem item = new ListItem();

item.Text = Server.HtmlDecode(row.Cells[2].Text);

// Find, enable and check the Added Checkbox

CheckBox chk = (CheckBox)row.Cells[4].Controls[0];

chk.Enabled = true;

chk.Checked = true;

// If the customer is not already in the ListBox, add the ListItem

// object to the Items collection of the ListBox control.

if (!CustomersListBox.Items.Contains(item))






void CustomersGridView_RowCreated(Object sender, GridViewRowEventArgs e)


// The GridViewCommandEventArgs class does not contain a

// property that indicates which row's command button was

// clicked. To identify which row's button was clicked, use

// the button's CommandArgument property by setting it to the

// row's index.

if (e.Row.RowType == DataControlRowType.DataRow)


// Instantiate a new CheckBox

CheckBox chk = new CheckBox();

chk.Enabled = false;

// Add it to the Control Collection




// Retrieve the LinkButton control from the first column.

LinkButton addButton = (LinkButton)e.Row.Cells[0].Controls[0];

// Set the LinkButton's CommandArgument property with the

// row's index.

addButton.CommandArgument = e.Row.RowIndex.ToString();




<html xmlns="">

<head runat="server">

<title>Untitled Page</title>



<form id="form1" runat="server">



GridView RowCommand Example</h3>

<table width="100%">


<td width="50%">

<asp:GridView ID="CustomersGridView" runat="server" AllowPaging="True" AutoGenerateColumns="False"

DataSourceID="CustomersSource" OnRowCommand="CustomersGridView_RowCommand" OnRowCreated="CustomersGridView_RowCreated"

BackColor="White" BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px"

CellPadding="4" ForeColor="Black" GridLines="Vertical">


<asp:ButtonField CommandName="Add" Text="Add" />

<asp:BoundField DataField="CustomerID" HeaderText="Customer ID" />

<asp:BoundField DataField="CompanyName" HeaderText="Company Name" />

<asp:BoundField DataField="City" HeaderText="City" />

<asp:TemplateField HeaderText="Add Column"></asp:TemplateField>


<FooterStyle BackColor="#CCCC99" />

<RowStyle BackColor="#F7F7DE" />

<SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />

<PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />

<HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />

<AlternatingRowStyle BackColor="White" />



<td valign="top" width="50%">


<br />

<asp:ListBox ID="CustomersListBox" runat="server"></asp:ListBox>




<!-- This example uses Microsoft SQL Server and connects -->

<!-- to the Northwind sample database. Use an ASP.NET -->

<!-- expression to retrieve the connection string value -->

<!-- from the Web.config file. -->

<asp:SqlDataSource ID="CustomersSource" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString1 %>"

SelectCommand="Select [CustomerID], [CompanyName], [City] From [Customers]" ProviderName="<%$ ConnectionStrings:NorthwindConnectionString1.ProviderName %>">







Andre Colbiornsen
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10/16/2005 4:23:41 AM
You cannot add a late binding exression inside a server control which gets parsed early in the cycle, even if it is not really a server control, but just an html snippet. It is still inside the template.

However you could do it in code in the databinding event handler.



10/16/2005 4:25:36 AM

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