Accessing a xaml Style resourcs in C#

Question

I tweaked the FeatureDataGrid Style by adding a button. I set the button in my resources (style for FeatureDataGrid). I added a new button and set it the Visibility to Collapsed Now I have some code in my C# and I want to make that button visible when something happens in my C# page. How would I do this MyFDG.Resources["SeeRelateButton"].Visibility = Visibility.Visible; ???????????????? Thanks Nathalie

DominiqueBroux · Answer

MyFDG.Resources["SeeRelateButton"].Visibility = Visibility.Visible; ????????????????

As Hyrum noticed, you can't change a Template this way.

But if your Handler 'SeeRelateButton_Click' is called, why not just change the visibility in the Handler (by using the 'sender ' argument)?

HyrumErnstrom · Answer

Templates are a self contained inside the Control and can't be accessed easily by the code outside the control.

The brute force way is to use the VisualTreeHelper, but this isn't the right way.

The right why is to implement an Attached DepenencyProperty that binds the visibility via ViewModel Object or create a class that inherits the FeatureDataGrid that has a Depenency Property for the buttons visibility. That why you can bind it all together.

NathalieNeagle · Answer

Any ideas?