WPF Binding with INotifyPropertyChanged does not update -

When I update by updating that property, I am serious in getting my WPF UI to update The problem is happening. Here is the definition of my visual model class:

  Namespot WpfModel {class AppModel: INotifyPropertyChanged {Personal Int _count = 7; Public int calculation {get {return _count; } Set {_count = value; OnPropertyChanged ("Count"); }} Public Zero Enhance () {Calculate ++; } Private Event PropertyChangedEventHandler PropertyChanged; Private Zero OnPropertyChanged (String Prop) {PropertyChangedEventHandler Handler = this.PropertyChanged; If (handler! = Null) {var e = new property changing event event ("prop"); Handler (it, E); }}}; }  

This is bound to the following XAML for my simple UI:

   & Lt; Label height = "28" margin = "116,12,0,0" name = "calculation labels" vertical alignment = "top" horizontal alignment = "left" width = "40" content = "{binding path = count}" / & Gt; & Lt; / Grid & gt; & Lt; / Window & gt;  

The application is defined as follows:

  Namespot WpfModel {/// & lt; Summary & gt; /// MainWindow.xaml for Interaction Logic /// & lt; / Summary & gt; Public Partial Class Main Window: Window {Private App MODEL _Model = New App MODEL (); Public Manvindo () {Initialization (); // _Model = new AppModel (); } Private Zero IncButton_Click (Object Sender, RoutedEventArgs E) {}}}  

When the app starts, everything grows, the label also initially shows that the value of calculating the property How much value is worth in Correctly updates the model to calling information, and it also works fine to increase the fault property directly shown in the code.

The problem here is that the event handler is never added by changing the property. I can move through the code in the debugger and see the value in the update of the property, and I can also see the call on onprint, but the property-handled handler is always empty.

Is there any problem with me, perhaps binding?

I am using MSVC 2010 Express.

The problem is that WpfModel is in the form of an instance variable, _model, not < / Em> The same example is being used as the window's datacontext. Thus, it is not obliged to do anything, and its sect will always be infamous.

To set up a datacentext, change your XAMM:

  & lt; window. Datacontex & gt; & Lt; Vm: AppModel x: name = "_model" /> & Lt; /Window.DataContext>  

Get rid of the frequency variable declared in the back code, and fix the OnPropertyChanged implementation (use the parameter instead of the literal string "prop"), and it works.