c# - PropertyChanged 事件处理程序始终为空

Question

当我第一次在其构造函数中将投标分配给标签时，标签会正确绑定并根据 CurrentMarket 类的当前 ComponentData 值显示正确的信息。但是，当 ComponentData 更改时，OnPropertyChanged 事件触发正常，但 ProperyChanged 处理程序始终为 NULL。有人可以建议我做错了什么吗？

我有一个标签，我像这样设置绑定：

    public StyledLabel(string Property, int i)
    {
        Binding BindingText = new System.Windows.Data.Binding(Property);
        BindingText.Source = Statics.CurrentMarket.ComponentData;
        BindingText.Converter = new TextConverter();
        this.SetBinding(Label.ContentProperty, BindingText);

     }

当前的市场类别如下所示：

public class CurrentMarket : INotifyPropertyChanged
{
    string sMarket = "";
    ComponentData cComponentData;

    public string Market
    {
        set
        {
            sMarket = value;
            OnPropertyChanged("Market");
            ComponentData = SharedBoxAdmin.Components[sMarket];
        }
        get
        {
            return sMarket;
        }
    }

    public ComponentData ComponentData
    {
        get { return cComponentData; }
        set
        {
            cComponentData = value;
            OnPropertyChanged("ComponentData");
        }
    }

    public CurrentMarket()
    {
    }

    public event PropertyChangedEventHandler PropertyChanged;

    private void OnPropertyChanged(string info)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(info));
        }
    }

 }

谢谢！

Answer 1

尝试将要绑定的属性名称指定为Path（Binding而不是 的一部分Source）：

Binding BindingText = new System.Windows.Data.Binding(Property);
BindingText.Source = Statics.CurrentMarket;
BindingText.Path = new PropertyPath("ComponentData");
BindingText.Converter = new TextConverter();
this.SetBinding(Label.ContentProperty, BindingText);