How can I access ResourceDictionary in wpf from C# code?

Question

I have a DataTemplate defined in a xaml file that I want to access via C# code. Can anyone please tell me how can I access it? I added a new ResourceDicti

Answer 1

Since Application.Current was null in my case, I've ended up using this:

    var myResourceDictionary = new ResourceDictionary();
    myResourceDictionary.Source =
        new Uri("/DllName;component/Resources/MyResourceDictionary.xaml",
                UriKind.RelativeOrAbsolute);  

and then getting the specified key I needed by using myResourceDictionary["KeyName"] as TypeOfItem

(source)

Answer 2

You can access a resource dictionary you added to your project as follows:

var rd = new ResourceDictionary();
rd.Source = new Uri("ms-appx:///Dictionary1.xaml");

Then you can access a resource stored in the resource dictionary like so:

someObject.Property = rd["mytemplate"];

NOTE:
You will have to modify the URI to the resource dictionary according to the location you created it relative to the project's base directory.

Answer 3

For the life of me, although I was able to load my resource dictionary via XAML, I wasn't able to load it via "code behind" (in C#).

So I resorted to have a view loading it: (MyView.xaml)

  <UserControl.Resources>
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/My.Proj;component/My/Path/myResourceDictionary.xaml" />
      </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </UserControl.Resources>

Then access it in my UT by instanciating that view and accessing it:

new MyView().Resources.MergedDictionaries[0]

Hacky, but works.