ItemCommand 事件 (Command)

當使用者選取與 Command 控制項關聯的命令時發生。

public event CommandEventHandler ItemCommand

備註

當定義 ItemCommand 事件處理常式時，Command 控制項通知處理常式何時因使用者互動而產生項目事件。與 Click 事件不同之處在於，ItemCommand 事件會反昇至父控制項。

ItemCommand 事件呈現是裝置的特定事件，並且會在 Command 控制項的＜裝置的特定行為＞章節中詳細討論。

在 OnClick 事件之後會引發 OnItemCommand 事件。在每次按一下命令按鈕時都會重複相同動作集的案例中，您可使用 Command 控制項的 CommandName 或 CommandArgument 屬性來識別使用者按一下的命令按鈕。

範例

下列範例示範如何截獲多個命令的 ItemCommand 事件。

<script language="vb" runat=server>

Sub cmd_OnItemCommand(sender As Object, e As CommandEventArgs)
   ' Use the value of the CommandName property to find
   ' a command button that has been clicked.
   message1.Text = "Today's quote of " + e.CommandName + _ 
   " is " + e.CommandArgument   

   message2.Text = "Yesterday's quote of " + e.CommandName + _
   " was " + (Convert.ToInt32(e.CommandArgument)-5)
End Sub

</script>

<mobile:form id="myForm" runat=server>
   <mobile:label id="message1" runat=server>Click the button for
      quotes</mobile:label> 
   <mobile:label id="message2" runat=server></mobile:label> 
   <mobile:command id="CmdA" onItemCommand ="cmd_OnItemCommand"
      CommandArgument="70" CommandName="ca" 
      runat="server" Text="Company A" />
   <mobile:command id="CmdB" onItemCommand ="cmd_OnItemCommand"
      CommandArgument="25" CommandName="cb" 
      runat="server" Text="Company B" />
   <mobile:command id="CmdC" OnItemCommand ="cmd_OnItemCommand"
      CommandArgument="110" CommandName="cc" 
      runat="server" Text= "Company C" />
</mobile:form>
[C#]

<script language="c#" runat=server>

void cmd_OnItemCommand(object sender, CommandEventArgs e)
{
   // Use the value of the CommandName property to find
   // a command button that has been clicked.
   message1.Text = "Today's quote of " + e.CommandName + 
   " is " + e.CommandArgument;   

   message2.Text = "Yesterday's quote of " + e.CommandName +
   " was " + (Convert.ToInt32(e.CommandArgument)-5);
}

</script>

<mobile:form id="myForm" runat=server>
   <mobile:label id="message1" runat=server>Click the button for
      quotes</mobile:label> 
   <mobile:label id="message2" runat=server></mobile:label> 
   <mobile:command id="CmdA" onItemCommand ="cmd_OnItemCommand"
      CommandArgument="70" CommandName="ca" 
      runat="server" Text="Company A" />
   <mobile:command id="CmdB" onItemCommand ="cmd_OnItemCommand"
      CommandArgument="25" CommandName="cb" 
      runat="server" Text="Company B" />
   <mobile:command id="CmdC" OnItemCommand ="cmd_OnItemCommand"
      CommandArgument="110" CommandName="cc" 
      runat="server" Text= "Company C" />
</mobile:form>

請參閱

ItemCommand 事件 (List) | ListCommandEventArgs 類別 | ItemCommand 事件 (ObjectList) | ObjectListCommandEventArgs 類別 | OnItemCommand 方法

Command 類別