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ListControl Constructor

Initializes a new instance of the ListControl class.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public ListControl()

The following code example demonstrates how to programmatically

create a ListBox control. The example uses a PlaceHolder control as a container for the ListBox.

<!-- The following example demonstrates how to programmatically 
create a ListBox. The example uses a PlaceHolder control as
a container for the ListBox. -->

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

<!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>ListBox Example</title>
<script runat="server">

      void SubmitBtn_Click(Object sender, EventArgs e) 
      {
         // Create a new ListBox.
         ListBox listbox1 = new ListBox();

         // Create ListItems to populate the ListBox.
         ListItem listItem1 = new ListItem("Item 1","Value 1");
         ListItem listItem2 = new ListItem("Item 2","Value 2");

         // Add the ListItems to the ListBox.
         listbox1.Items.Add(listItem1);
         listbox1.Items.Add(listItem2);

         // Add the ListBox to the Controls collection of the PlaceHolder control.
         Place.Controls.Add(listbox1);
      }

   </script>

</head>
<body>

   <h3>ListBox Example</h3>
   <br />

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

      <asp:button id="Button1"
                  Text="Click to create a two item ListBox" 
                  OnClick="SubmitBtn_Click" 
                  runat="server" />
      <br /><br />
      <asp:PlaceHolder id="Place" runat="server"/>

   </form>

</body>
</html>
   

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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