WPF data context scenario

Question

I have a user control in XAML code (a data grid) with this databind statement:

<WpfToolkit:DataGrid ItemsSource="{Binding Path=MyCollection}" x:Name="lvItems"

I use this user control in a presenter class where I istantiate a modelview class and set datacontext to an object in my view

...so MyCollection object is defined in may view class and not in the code behind of my control

but I Want to access this MyCollection property from codebehind because I want to implement a button event that filter my collection source

how can I access to MyCollection in codebehind or where i wrong...?

thanks

Answer 1

maybe something like that?

put this at your button click event or the button command

var yourModelView = this.DataContext as IYourModelView;
if (yourModelView != null) {
  var yourColl = yourModelView.MyCollection;
  // do something with this collection
}

EDIT

public IYourModelView
{
  ICollection MyCollection {get; set;}
}

public class YourModelView1 : IYourModelView
{}

public class YourModelView2 : IYourModelView
{}

hope this helps