如何从我的ViewModel访问视图属性？

Question

我有一个ViewModel的属性是从视图（XAML文件）有界。 我在代码后面的文件中也有一个属性“StaticText”。

如何从ViewModel内部访问属性“StaticText”？

卡梅伦的建议，我创建了一个依赖属性在我看来：

String textToTest="I am just testing ."; 

    public string TextToTest 
    { 
     get { return (string)this.GetValue(TextToTestProperty); } 
     set { this.SetValue(TextToTestProperty, value); } 
    } 
    public static readonly DependencyProperty TextToTestProperty = 
     DependencyProperty.Register("TextToTest", typeof(string), 
     typeof(MainWindow), new PropertyMetadata(false)); 

，我已经添加到了构造函数：

  Binding aBinding = new Binding(); 
     aBinding.Path = new PropertyPath("TextToTest"); 
     aBinding.Source = viewModel; 
     aBinding.Mode = BindingMode.TwoWay; 
     this.SetBinding(TextToTestProperty, aBinding); 

，但我得到一个异常时，我运行代码。

Answer 1

通过使属性为Dependency Property，您可以将视图中的属性绑定到ViewModel中的属性。

public string TextToTest 
{ 
    get { return (string)this.GetValue(TextToTestProperty); } 
    set { this.SetValue(TextToTestProperty, value); } 
} 
public static readonly DependencyProperty TextToTestProperty = 
    DependencyProperty.Register("TextToTest", typeof(string), 
    typeof(MyControl), new PropertyMetadata("")); 

见How to: Implement a Dependency Property