c# - WPF复选框双向绑定(bind)不起作用

Question

我有

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

和

 public bool Foo{ get; set; }

选中/取消选中集 Foo , 但设置 Foo在代码中不会更改复选框状态。有什么建议吗？

Answer 1

您需要提高PropertyChanged当您在 DataContext 中设置 Foo 时的事件.通常，它看起来像:

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));
        }
    }
}

如果您调用 Foo = someNewvalue , PropertyChanged将引发事件并更新您的 UI