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ListBox.Rows Property

Gets or sets the number of rows displayed in the ListBox control.

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

public virtual int Rows { get; set; }
<asp:ListBox Rows="Int32" />

Property Value

Type: System.Int32
The number of rows displayed in the ListBox control. The default value is 4.

ExceptionCondition
ArgumentOutOfRangeException

The specified number of rows is less than one or greater than 2000.

Use the Rows property to specify the number of rows to display in the ListBox control.

Caution noteCaution:

The number of rows must be between one and 2000. Values outside of this range will raise an exception.

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

TopicLocation
How to: Add ListBox Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications
How to: Add ListBox Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications

The following example demonstrates how to use the Rows property to display six rows in the ListBox control.

<%@ 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>
    <title>ListBox Example</title>
<script language="C#" runat="server">

      void SubmitBtn_Click(Object sender, EventArgs e) 
      {
         if (ListBox1.SelectedIndex > -1)
            Label1.Text="You chose: " + ListBox1.SelectedItem.Text;
      }

   </script>

</head>
<body>

   <h3>ListBox Example</h3>

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

      <asp:ListBox id="ListBox1" 
           Rows="6"
           Width="100px"
           SelectionMode="Single" 
           runat="server">

         <asp:ListItem>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>

      </asp:ListBox>

      <asp:button id="Button1"
           Text="Submit" 
           OnClick="SubmitBtn_Click" 
           runat="server" />

      <asp:Label id="Label1" 
           Font-Names="Verdana" 
           Font-Size="10pt" 
           runat="server"/>

   </form>

</body>
</html>

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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