在离开当前单元格之前，WPF XamDataGrid不会更新

I have SEVERAL XamDataGrids in my application, and I want all of them to enable the respective Save buttons as soon as the user changes a checkbox in them. This currently doesn't happen until I leave the cell or press enter etc, because the cell is still in edit mode. I know how to fix this using a post I found in code-behind:I have SEVERAL XamDataGrids in my application,