Command.ItemCommand 事件
定义
重要
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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
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。
