Accessing the WPF DataGrid “empty” or “rowcolumn” header
问题 I am trying to get access to the header that is at the intersection of the rows and columns headers in a Net3.5 WPF DataGrid. Josh Smith calls this the "Empty Header" in an article on a different grid control and I would call it the "RowColumn" header since it in the first position for both the column and row headers and is the only header that is part of both. It defaults to a button with a lower right hand arrow that when you press selects all the items in the DataGrid. I can see this