通过

Command.ItemCommand 事件

  • 参考

定义

命名空间:
System.Web.UI.MobileControls
程序集:
System.Web.Mobile.dll

在用户选择与 ObjectList 项关联的命令时发生。 此 API 已废弃不用。 有关如何开发 ASP.NET 移动应用程序的信息，请参阅 移动应用 & 具有 ASP.NET 的网站。

public:
 event System::Web::UI::WebControls::CommandEventHandler ^ ItemCommand;
public event System.Web.UI.WebControls.CommandEventHandler ItemCommand;
member this.ItemCommand : System.Web.UI.WebControls.CommandEventHandler 
Public Custom Event ItemCommand As CommandEventHandler

事件类型

CommandEventHandler

示例

下面的代码示例演示如何对 ItemCommand 页面上的多个命令使用 事件。

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

<script runat="server">
    void cmd_OnItemCommand(object sender, CommandEventArgs e)
    {
        // Create variables for data
        string txt1 = "Today's quote of {0} is {1}";
        string txt2 = "Yesterday's quote of {0} was {1}";
        int val = (Convert.ToInt32(e.CommandArgument) - 5);
        
        // Set the text values of the labels
        message1.Text = String.Format(txt1, e.CommandName, 
            e.CommandArgument);
        message2.Text = String.Format(txt2, e.CommandName, val);
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
    <mobile:form id="form1" runat="server">
        <p>
            <mobile:label id="message1" runat="server">
                Click the button for quotes
            </mobile:label>
            <mobile:label id="message2" runat="server" />
        </p>
        <mobile:command id="CmdA" Format="Link" 
            onItemCommand ="cmd_OnItemCommand" 
            CommandArgument="70" CommandName="ca" 
            runat="server" Text="Company A" />
        <mobile:command id="CmdB" Format="Link" 
            onItemCommand ="cmd_OnItemCommand" 
            CommandArgument="25" CommandName="cb" 
            runat="server" Text="Company B" />
        <mobile:command id="CmdC" Format="Button" 
            OnItemCommand ="cmd_OnItemCommand" 
            CommandArgument="110" CommandName="cc" 
            runat="server" Text= "Company C" />
    </mobile:form>
</body>
</html>

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

<script runat="server">
    Private Sub cmd_OnItemCommand(ByVal sender As Object, ByVal e As CommandEventArgs)
        ' Create variables for data
        Dim txt1 As String = "Today's quote of {0} is {1}"
        Dim txt2 As String = "Yesterday's quote of {0} was {1}"
        Dim Val As Integer = (Convert.ToInt32(e.CommandArgument) - 5)
        
        ' Set the text values of the labels
        message1.Text = String.Format(txt1, e.CommandName, _
            e.CommandArgument)
        message2.Text = String.Format(txt2, e.CommandName, Val)
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
    <mobile:form id="form1" runat="server">
        <p>
            <mobile:label id="message1" runat="server">
                Click the button for quotes
            </mobile:label>
            <mobile:label id="message2" runat="server" />
        </p>
        <mobile:command id="CmdA" Format="Link" 
            onItemCommand="cmd_OnItemCommand"
            CommandArgument="70" CommandName="ca" 
            runat="server" Text="Company A" />
        <mobile:command id="CmdB" Format="Link"
            onItemCommand ="cmd_OnItemCommand" 
            CommandArgument="25" CommandName="cb" 
            runat="server" Text="Company B" />
        <mobile:command id="CmdC" Format="Button" 
            OnItemCommand="cmd_OnItemCommand"
            CommandArgument="110" CommandName="cc" 
            runat="server" Text="Company C" />
    </mobile:form>
</body>
</html>

注解

ItemCommand定义事件处理程序时，控件会在Command通过用户交互生成项事件时通知处理程序。

Click与 事件不同， ItemCommand 事件向上浮升到父控件。 事件 ItemCommand 呈现特定于设备，并在 的 System.Web.UI.MobileControls.Command“设备特定行为”部分中进行了详细讨论。

事件 OnItemCommand 在事件后 OnClick 引发。 在每次单击命令按钮时重复相同的操作集的方案中，可以使用 CommandName 控件的 Command 或 CommandArgument 属性来标识用户单击的命令按钮。

适用于

另请参阅