Question

我正在尝试在2个依赖项属性之间进行数据绑定。我想这应该很容易，反正我只是不明白。我已经用谷歌搜索了，但我真的不知道我做错了什么。

我正在尝试将ControlPointProperty绑定到QuadraticBezierSegment.Point1Property，但它不起作用。谢谢你的提示！

 class DataBindingTest : DependencyObject
{
    // Dependency Property
    public static readonly DependencyProperty ControlPointProperty;


    // .NET wrapper
    public Point ControlPoint
    {
        get { return (Point)GetValue(DataBindingTest.ControlPointProperty); }
        set { SetValue(DataBindingTest.ControlPointProperty, value); }
    }


    // Register Dependency Property
    static DataBindingTest()
    {
        DataBindingTest.ControlPointProperty = DependencyProperty.Register("ControlPoint", typeof(Point), typeof(DataBindingTest));
    }


    public DataBindingTest()
    {
        QuadraticBezierSegment bezier = new QuadraticBezierSegment();

        // Binding
        Binding myBinding = new Binding();
        myBinding.Source = ControlPointProperty;
        BindingOperations.SetBinding(bezier, QuadraticBezierSegment.Point1Property, myBinding);

        // Test Binding: Change the binding source
        ControlPoint = new Point(1, 1);


        MessageBox.Show(bezier.Point1.ToString()); // gives (0,0), should be (1,1)
    }
}

Answer 1

Source不是要绑定的属性，而是源对象。这有效：

Binding myBinding = new Binding("ControlPoint");
myBinding.Source = this;

2个依赖属性之间的数据绑定

1 个答案: