wpf - How to force editing of a DataGridComboBoxColumn? -

I can expose a DataGridComboBoxColumn to a grid, but to show the user its drop-down list twice You must click (get first focus and enter editing mode).

How do I implement a program to show the drop-down list?

is not the exact answer to your actual question, but since the problem needs to be clicked twice The blog post can help, it includes a sample to enable single-click editing in a datagrid.