BindingExpression.DataItem 屬性

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

public object DataItem { get; }

member this.DataItem : obj

Public ReadOnly Property DataItem As Object

屬性值

這個 BindingExpression 所使用的繫結來源物件。

範例

下列範例示範 Click 使用 方法來取得 BindingExpression 的事件處理常式實作，然後呼叫 DataItem 屬性來存取系 GetBindingExpression 結來源物件。

TextBlockSavingsText 是系結目標物件，而其 Text 屬性是系結目標屬性。

private void OnRentRaise(Object sender, RoutedEventArgs args)
{
  // Update bills
  System.Random random = new System.Random();
  double i = random.Next(10);
  BindingExpression bindingExpression =
    BindingOperations.GetBindingExpression(SavingsText, TextBlock.TextProperty);
  SDKSample.NetIncome sourceData = (SDKSample.NetIncome) bindingExpression.DataItem;
  sourceData.Rent = (int)((1 + i / 100) * (double)sourceData.Rent);
}

Private Sub OnRentRaise(ByVal sender As Object, ByVal args As RoutedEventArgs)
    Dim _random As New System.Random()
    Dim num1 As Double = _random.Next(10)
    Dim expression1 As BindingExpression = BindingOperations.GetBindingExpression(Me.SavingsText, TextBlock.TextProperty)
    Dim income1 As NetIncome = DirectCast(expression1.DataItem, NetIncome)
    income1.Rent = CInt(((1 + (num1 / 100)) * income1.Rent))
End Sub

適用於