How do I make a control fill the whole cell in a ListView (with a GridView)? I\'ve played around with various properties, but the control is always it\'s minimum size.
Another almost-solution is to do something as follows in your datatemplate that goes into the gridviewcolumn
Width="{Binding RelativeSource={RelativeSource Mode=FindAncestor , AncestorType=ListViewItem, AncestorLevel=1},Path=ActualWidth}">
This results in it stretching the textbox to the width of the column, but the right edge is clipped and not rendered. I haven't fixed that part yet. So the already accepted answer is still probably the best one.
Here's a sample DataTemplate which does this.