How to access the viewmodel of a dynamically added UserControl

Question

Scenario is something like this, I am having a MainWindow.xaml where as part of this window I will load a UserControl. This UserControl is actually in some other project and it is added in a ResourceDictionary with a key as below,

<ContentControl x:Key="Template1">
    <customcontrol:Template1UserControl/>
</ContentControl>

So in MainWindow.xaml I will refer this key as below,

<ContentControl Content="{StaticResource Template1}"/>

Now, like this I am able to see the Template1UserControl in MainWindow.xaml , but the problem is I don't know how to access the datacontext of Template1UserControl in MainWindow.xaml .

Template1 is like a variable, it can have Template2UserControl tomorrow, which can be anything.

Can anyone please help me to do this in WPF. If I should apply some other strategy over here to access the viewmodel of Template1UserControl , that also is most welcome.

Thanks in advance!

Answer 1

Give the ContentControl in the MainWindow an x:Name :

<ContentControl x:Name="cc" Content="{StaticResource Template1}"/>

...and try to cast the properties:

var theTemplate = cc.Content as ContentControl;
var theUserControl = theTemplate?.Content as UserControl;
var theDataContext = theUserControl?.DataContext;