ExecutedRoutedEventArgs.Parameter 屬性

定義

命名空間:

System.Windows.Input

組件:

PresentationCore.dll

取得命令的資料參數。

public:
 property System::Object ^ Parameter { System::Object ^ get(); };

public object Parameter { get; }

member this.Parameter : obj

Public ReadOnly Property Parameter As Object

屬性值

Object

命令特有資料。 預設值是 null。

範例

下列範例會 ExecutedRoutedEventHandler 建立自訂 RoutedCommand的 。 處理程式會使用目前的時間和Value透過 傳遞至處理程式ExecutedRoutedEventArgs.Parameter的 Slider 控制項屬性來更新 TextBox 。

//  Executed Event Handler
//
//  Updates the output TextBox with the current seconds 
//  and the target second, which is passed through Args.Parameter.
private void CustomCommandExecuted(object sender, ExecutedRoutedEventArgs e)
{
    txtResults.Text = "Command Executed at " +
        DateTime.Now.Second + " seconds after the minute \n\n" +
        "The target second is set to " +
        e.Parameter;
}

'  Executed Event Handler
'
'  Updates the output TextBox with the current seconds 
'  and the target second, which is passed through Args.Parameter.
Private Sub CustomCommandExecuted(ByVal sender As Object, ByVal e As ExecutedRoutedEventArgs)
    txtResults.Text = "Command Executed at " & Date.Now.Second & " seconds after the minute " & vbLf & vbLf & "The target second is set to " & e.Parameter.ToString()
End Sub

備註

這個屬性代表特定命令所定義的泛型數據參數。

如果不需要此參數， null 可以傳遞。

一般而言， Parameter 會在執行命令時，用來將特定資訊傳遞至 命令。 數據類型是由 命令所定義。

另請參閱

• ExecutedRoutedEventHandler
• CommandBinding