具有双向绑定的 DependencyProperty

Question

我有一个高度自定义的编辑控件，它继承了RichTextBox。我需要一种将Value 绑定到此控件的方法，因此我注册了一个新的DependencyProperty，但我无法按照我的需要对其进行编码。

public static readonly DependencyProperty ValueProperty =
            DependencyProperty.Register("Value", typeof(string), typeof(XliffRichCellEditor),
            new PropertyMetadata(new PropertyChangedCallback(XliffRichCellEditor.OnValuePropertyChanged)));
public String Value
{
    get { return (String)this.GetValue(ValueProperty); }
    set { this.SetValue(ValueProperty, value); }
}

private static void OnValuePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
    // Need to change Document in  RichTextBox when Binding Source is changed
    // But also ignore if the change comes from RichTextBox which is only updating
    // the DependencyProperty. In this case Binding Source should be updated.
}

请帮忙。

Answer 1

使用可以在你的Binding语句中使用UpdateSourceTrigger=Explicit，将属性更新的控制权掌握在你的手中。

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