Add ListView column from an UserControl.

I'm assuming you are setting ListView.View to GridView and that, in that GridView, you would be making uses of the Columns property to specify each GridViewColumn. I'm not sure if you can bind GridView.Columns to another collection, so let's assume you can't. You would create a GridViewColumnCollection (that type already exists) property on UserControl, perhaps calling it GridColumns. Since you want to populate this list from XAML, you'd have to make GridColumns a dependency property. In the Register method (which you must called for all dependency properties), there is an overload which accepts PropertyMetadata. In one of the constructors for PropertyMetadata, it allows you to specific a delegate to handle the event of the property being changed. You will want to sign up to that event with a method on your UserControl. Let's call that method HandleChangedColumns. This HandleChangedColumns method will empty the ListView DataGrid's Columns, then repopulate them using the columns that were specified by the value in GridColumns (remember, that was the dependency property on your UserControl). That way, whenever somebody uses your user control in XAML and specifies the value of GridColumns, your HandleChangedColumns method will be notified and it will then fill the ListView's columns with the ones specified by the user of your UserControl.