wpf - Activation/deactivation of toolbar buttons using Prism -

let me know I am in the process of learning the prism structure and I have already come together. But I was thinking about how to create toolbars (and context menus), where each module can register its button.

For this example, I want all buttons to be located in the same toolbar control which is located in my shell. The toolbar itemsSource is the property of a toolbar item in the observation list & lt; Framework Element & gt; is built into a visual model. Elements can be added to this collection using a ToolBarRegistry service, it is ViewModel:

  public square ShellViewModel { Private IToolBarRegistry _toolBarRegistry; Personal observable collection & lt; Framework Element & gt; _toolBarItems; Public ShelvesModel () {_toolBarItems = New Observational Collection & lt; Framework Element & gt; (); _toolBarRegistry = new toolbarwid (this); } Public Observable Collection & lt; Framework Element & gt; ToolBarItems {get {return _toolBarItems; }}}   
  Note that the collection of typeworkwork must be a more solid type again if this is the correct solution.   
 One way to register image buttons in my  ToolBarRegistry  is:  
  Registered Public Zero ImageButton (String ImageSource, ICMMand Command) {var icon = new bitmap image (new URI (image source)); Var img = new image (); Img.Source = icon; IMG Wideth = 16; Var BTN = New Button (); BTN Content = img; BTN Command = command; _shellViewModel.ToolBarItems.Add (btn); }   
 I call this method from my  order module  and buttons appear properly. So far so good.  
 The problem is that how can I control when I should delete these buttons again. If I navigate a view in any other module (and sometimes in other modules in the same module), then I want to hide these module-specific buttons again.  
 Do you have any suggestions on doing this? Am I delivering this problem in a wrong way, or can I modify it already? How did you solve this problem?  
  
 
 
 I do not include the  button  in  observable collection . Instead, think about this approach:  
 Create ViewModel for toolbar button  
  class toolbar buttonviewmodel: INotifyPropertyChanged {// INotifyPropertyChanged implementation provided by you for public string ImageSource {get; Set; } Received the public ICommand command { Set; } Get Public Child Available (Receive; Set; }}   
 Then definitely change  ToolBarItems  to this type of archive.  
 Add  ToolBarButtonViewModel  to your  ShellView ,  DataTemplate  and  ItemsSource  to whatever your The control of the toolbar is in the collection of ViewModels, for example:  
  & lt; Datatomplate & gt; & Lt; Button command = "{binding command}" & gt; & Lt; Button.Content & gt; & Lt; Image source = "{binding image source}" /> & Lt; /Button.Content> & Lt; / Button & gt; & Lt; / DataTemplate & gt;   
 Now you can force the  button. Specialty  to  isvizible  to solve your immediate problem.  
 As an added bonus, you can also:  
 
 Change the appearance of the toolbar buttons completely from XAML  
 The mechanism depends on the attributes of your application:  ToolBarButtonViewModel    
 On update  
  
 There are several options - here are some (keep in mind when reading):  
 
 Necessary Implement your view or view modules and enable / disable buttons  
  
 Route all navigation through your own code ( CustomNavigationService ) and Decide what to do in this