我需要图像源绑定版本背后的代码

Question

后面的代码。

Class MainWindow 

Private Sub MainWindow_Loaded(sender As Object, e As RoutedEventArgs) Handles Me.Loaded

    Dim myBinding As New Binding
    With myBinding
        .Source = Image1.Source
        .Mode = BindingMode.Default
        .UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
    End With
End Sub

End Class   

那么，为什么 myBinding 在后面的代码中不起作用？

Answer 1

为了在其源属性发生更改时更新绑定，您需要指定一个路径：

Dim myBinding As New Binding
With myBinding
    .Source = Image1
    .Path = new PropertyPath("Source")
End With

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除此之外，设置BindingMode.Default和UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged是没有意义的。对此绑定没有影响。