8.2. Binding Data to a Web Forms Control

Problem

You want to bind multiple columns in a result set to an ASP.NET control.

Solution

Set the control's advanced properties before calling DataBind().

Follow these steps:

  1. Create a C# ASP.NET web application named BindWebFormSimpleControl.

  2. Add the following controls to the Default.aspx design surface:

    • ListBox named departmentListBox

    • TextBox named selectedItemTextBox

    The completed layout of the Web Form page Default.aspx is shown in Figure 8-3.

    Layout for Default.aspx in BindWebFormSimpleControl solution

    Figure 8-3. Layout for Default.aspx in BindWebFormSimpleControl solution

    The code in Default.aspx in the project BindWebFormSimpleControl is shown in Example 8-3.

    Example 8-3. File: Default.aspx for BindWebFormsSimpleControl solution

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
    Inherits="BindWebFormSimpleControl._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ListBox ID="departmentListBox" runat="server"
            onselectedindexchanged="departmentListBox_SelectedIndexChanged">
        </asp:ListBox>
        <br /><br />
        <asp:TextBox ID="selectedItemTextBox" runat="server"></asp:TextBox>
    </div>
    </form>
</body>
</html>

  3. Create the C# code-behind in Default.aspx.cs in the project ...

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