如何在wpf代码中绑定静态变量？

Question

我有静态类'MappingService'。

public  class MappingService : INotifyPropertyChanged
{
    static readonly MappingService _Instance = new MappingService();
    public static MappingService Instance
    {
        get { return _Instance; }
    }

    public Efficiency Source { get; set; }
}

并在后面的代码中创建ComboBox 我想在后面的代码中绑定ItemsSource MappingService.Instance.Source 。

comboBox.SetBinding(ItemsControl.ItemsSourceProperty, new Binding("MappingService.Instance.Source") { Mode = BindingMode.TwoWay });

但我无法访问MappingService.Instance.Source。

请帮助我。 谢谢。

Answer 1

这是一种简单的方法。可能有更好的选择，这取决于你的设计。试试这个

  public  class MappingService : INotifyPropertyChanged
    {
    static readonly MappingService _Instance = new MappingService();
    public static MappingService Instance
   {
    get { return _Instance; }
    }

    public MappingService BindingObject 
    {
    get { MappingService._Instance; }
    }
     public Efficiency Source { get; set; }
   }

你的xaml代码。

  comboBox.SetBinding(ItemsControl.ItemsSourceProperty, new Binding("BindingObject.Source") { Mode = BindingMode.TwoWay });

您只需在实例引用中添加静态引用。

Answer 2

在这里你可以绑定：

var propertyPath = new PropertyPath("Source");
var binding = new System.Windows.Data.Binding
{
     Path = propertyPath,
     Mode = BindingMode.TwoWay,
     Source = MappingService.Instance
};
BindingOperations.SetBinding(
    comboBox,
    System.Windows.Controls.ItemsControl.ItemsSourceProperty,
    binding);