Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

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; }

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>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
Show:
© 2015 Microsoft