WPF TextBlock的文本装订 [英] WPF TextBlock text Binding

问题描述

TextBlock的绑定不工作，我不能弄清楚为什么...

（此代码的工作，但文本块没有更新）

XAML

<预类=郎咸平的XML prettyprint-覆盖> < TextBlock的X：名称=filterAllText
文本={绑定UpdateSourceTrigger = PropertyChanged的}/>


代码隐藏

  filterAllText.DataContext = LogSession.test.MyCoynt; 
  

C＃

 公共类测试：INotifyPropertyChanged的{
公众诠释myCoynt; 
 
公众诠释MyCoynt {
 {返回myCoynt; } 
集合{
 myCoynt =价值; 
 NotifyPropertyChanged（）; 
} 
} 
 
公共事件PropertyChangedEventHandler的PropertyChanged; 
 
受保护的虚拟无效NotifyPropertyChanged（
 [CallerMemberName]字符串参数propertyName =）{
 PropertyChangedEventHandler处理器=的PropertyChanged; 
如果（处理！= NULL）{
处理器（这一点，新PropertyChangedEventArgs（propertyName的））; 
} 
} 
  

解决方案

尝试这样的：

<预类=郎咸平的XML prettyprint-覆盖> < TextBlock的X：名称=filterAllText
文本= {结合UpdateSourceTrigger = PropertyChanged的，路径= MyCoynt}/>


和设置您的的DataContext ，如：

  filterAllText.DataContext = LogSession.test; 
  

the TextBlock binding does not work and I cant figure why...

(This Code Works but the TextBlock does not get Updated )

XAML

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

Codebehind

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));
        }
}

解决方案

Try this:

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

And set your DataContext like:

filterAllText.DataContext = LogSession.test;

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