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Command Class

Creates a user interface element that enables users to invoke ASP.NET event handlers and it provides a means to post user input from UI elements back to the server.

Namespace:  System.Web.UI.MobileControls
Assembly:  System.Web.Mobile (in System.Web.Mobile.dll)

[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class Command : TextControl, IPostBackEventHandler, 
<mobile:Command />

The Command control displays as an interactive UI element on the requesting device. The label of the UI element comes from the Text property, which is inherited from the TextControl base class.

Caution noteCaution:

Avoid using special characters in ASP.NET mobile Web page URLs. The HREF tags generated for posting Command events back to the server are not strictly validated. For example, a URL that includes spaces results in the generation of WML that cannot be handled by some WML browsers.

Walkthrough: Creating Web Pages for Mobile DevicesBuilding ASP .NET Web Applications in Visual Studio

The following code example demonstrates how to attach command events. Clicking either of the Command buttons raises the OnItemCommand event. The user-defined function uses the CommandEventArgs argument to see which Command button was clicked.


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

<%@ Page Language="C#" 
    Inherits="System.Web.UI.MobileControls.MobilePage" %>
<%@ Register TagPrefix="mobile" 
    Assembly="System.Web.Mobile" %>
<%@ Import Namespace="System.Web.Mobile" %>

<script runat="server">
    public void Page_Load(Object sender, EventArgs e)
        MobileCapabilities caps
            = (MobileCapabilities)Request.Browser;
        if (caps.MaximumSoftkeyLabelLength == 5)
            Command1.SoftkeyLabel = "Click";
        else if (caps.MaximumSoftkeyLabelLength > 5)
            Command1.SoftkeyLabel = "Submit";

    void Command_Click(object sender, CommandEventArgs e)
        string txt = "You clicked Button{0}. ({1} points)";
        if (e.CommandName.ToString() == "Command1")
            Label1.Text = String.Format(txt, 1, 
        else if (e.CommandName.ToString() == "Command2")
            Label1.Text = String.Format(txt, 2, 

<html xmlns="" >
    <mobile:form id="form1" runat="server">
        <mobile:Label id="Label1" runat="server">
            Click a button
        <mobile:Label id="Label2" runat="server" /> 
        <mobile:Command id="Command1"  Format="Button"
            CommandName="Command1" runat="server" 
            Text="Button1" CommandArgument="70" />
        <mobile:Command id="Command2" Format="Link"
            CommandName="Command2" runat="server" 
            Text="Button2" CommandArgument="50" />

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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