WPF复选框双向绑定工作不

Question

我

<DataGridCheckBoxColumn 
    Binding="{Binding Path=Foo, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
/> 

而且

public bool Foo{ get; set; } 

选中/取消选中设置Foo，但在代码中设置Foo不改变复选框状态。任何建议？

Answer 1

当您在DataContext中设置Foo时，需要引发PropertyChanged事件。通常情况下，它看起来是这样的：

public class ViewModel : INotifyPropertyChanged 
    { 
     private bool _foo; 

     public bool Foo 
     { 
      get { return _foo; } 
      set 
      { 
       _foo = value; 
       OnPropertyChanged("Foo"); 
      } 
     } 

     public event PropertyChangedEventHandler PropertyChanged; 

     protected void OnPropertyChanged(string propertyName) 
     { 
      var propertyChanged = PropertyChanged; 
      if (propertyChanged != null) 
      { 
       propertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
      } 
     } 
    } 

如果你调用foo = someNewvalue，PropertyChanged事件将提高你​​的UI应该更新