WPF複選框雙向綁定工作不

Question

我

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

而且

public bool Foo{ get; set; } 

選中/取消選中設置Foo，但在代碼中設置Foo不改變複選框狀態。任何建議？

Answer 1

當您在DataContext中設置Foo時，需要引發PropertyChanged事件。通常情況下，它看起來是這樣的：

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)); 
      } 
     } 
    } 

如果你調用foo = someNewvalue，PropertyChanged事件將提高你​​的UI應該更新