ImageButton.CommandArgument Property


Gets or sets an optional argument that provides additional information about the CommandName property.

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

public string CommandArgument { get; set; }

Property Value

Type: System.String

An optional argument that supplements the CommandName property.

Sometimes, multiple ImageButton controls are related and share the same value for the CommandName property, such as Sort. Use this property to supplement the CommandName property with additional information about the command to perform, such as Ascending. The values of the CommandName and CommandArgument properties are typically used in the OnCommand event handler to determine the action to perform when the ImageButton control is clicked.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins.

The following example demonstrates how to use the CommandArgument property to associate a command argument with an ImageButton control.


The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Forms Page Code Model.

<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<html xmlns="" >
    <title>ImageButton CommandName Sample</title>
<script language="C#" runat="server">

      void ImageButton_Command(object sender, CommandEventArgs e) 
         if (e.CommandName == "Sort" && e.CommandArgument == "Ascending")
            Label1.Text = "You clicked the Sort Ascending Button";
            Label1.Text = "You clicked the Sort Descending Button";




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

      <h3>ImageButton CommandName Sample</h3>

      Click an image.<br /><br />

      <asp:ImageButton id="imagebutton1" runat="server"
           AlternateText="Sort Ascending"

      <asp:ImageButton id="imagebutton2" runat="server"
           AlternateText="Sort Descending"

      <br /><br />

      <asp:label id="Label1" runat="server"/>



.NET Framework
Available since 1.1
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