Command.ItemCommand 事件
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
發生於使用者選取與 ObjectList 項目關聯的命令時。 這個 API 已經過時。 如需如何開發 ASP.NET 行動應用程式的資訊，請參閱 具有 ASP.NET 的Mobile Apps & Sites。
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 事件類型
範例
下列程式代碼範例示範如何在頁面上針對多個命令使用 ItemCommand 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>
備註
ItemCommand定義事件處理程式時，Command控件會在透過使用者互動產生專案事件時通知處理程式。
Click不同於事件，ItemCommand事件會升至父控件。 事件 ItemCommand 轉譯是裝置特定的，並在的 System.Web.UI.MobileControls.Command「裝置特定行為」一節中詳細討論。
事件 OnItemCommand 會在事件之後 OnClick 引發。 在每次按下命令按鈕時重複相同動作集的案例中，您可以使用 CommandName 控件的 Command 或 CommandArgument 屬性來識別使用者按兩下的命令按鈕。
