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ListBox.SelectionMode Property

Gets or sets the selection mode of the ListBox control.

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

public virtual ListSelectionMode SelectionMode { get; set; }

Property Value

Type: System.Web.UI.WebControls.ListSelectionMode
One of the ListSelectionMode values. The default value is Single.


The specified selection mode is not one of the ListSelectionMode values.

Use the SelectionMode property to specify the mode behavior of the ListBox control. Setting this property to ListSelectionMode.Single indicates only a single item can be selected from the ListBox control, while ListSelectionMode.Multiple specifies multiple items can be selected.

The value of the SelectionMode property is stored in view state.

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The following example illustrates how to use the SelectionMode property to allow the user to select multiple selections from the ListBox control.

<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<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) 

         Message.Text = "You chose: <br />";

         // Iterate through the Items collection of the ListBox and 
         // display the selected items.
         foreach (ListItem item in ListBox1.Items)


               Message.Text += item.Text + "<br />";






   <h3>ListBox Example</h3>

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

      Select items from the list and click Submit. <br />

      <asp:ListBox id="ListBox1" 

         <asp:ListItem Selected="True">Item 1</asp:ListItem>
         <asp:ListItem>Item 2</asp:ListItem>
         <asp:ListItem>Item 3</asp:ListItem>
         <asp:ListItem>Item 4</asp:ListItem>
         <asp:ListItem>Item 5</asp:ListItem>
         <asp:ListItem>Item 6</asp:ListItem>


      <br /><br />

      <asp:button id="Button1"
           runat="server" />

      <br /><br />

      <asp:Label id="Message" 



.NET Framework

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