Question

TextBlock绑定不起作用，我不知道为什么......

（此代码有效，但TextBlock未获得更新）

XAML

<TextBlock x:Name="filterAllText"
 Text="{Binding UpdateSourceTrigger=PropertyChanged}" />

代码隐藏

filterAllText.DataContext = LogSession.test.MyCoynt;

C＃

public class Test : INotifyPropertyChanged {
 public int myCoynt;

     public int MyCoynt {
        get { return myCoynt; }
        set {
            myCoynt = value;
            NotifyPropertyChanged();
        }
    }

     public event PropertyChangedEventHandler PropertyChanged;

     protected virtual void NotifyPropertyChanged(
        [CallerMemberName] String propertyName = "") {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null) {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
}

Answer 1

试试这个：

<TextBlock x:Name="filterAllText" 
    Text="{Binding UpdateSourceTrigger=PropertyChanged, Path=MyCoynt}" />

并将DataContext设置为：

filterAllText.DataContext = LogSession.test;

Answer 2

<TextBlock x:Name="filterAllText" Text="{Binding Path=., UpdateSourceTrigger=PropertyChanged}" />

这应该有效，但不是通常的方式

编辑：更好的方法是来自Goanne的anwser

WPF TextBlock文本绑定

2 个答案: