Dynamically changing the editor type of a column depending on a condition.

[thecyberzone]

In a editable datagrid a column contains combobox as default editor who's content is dynamically loaded depending upon another column value. This much I can make. But I want when the number of rows in combobox becomes 0, i.e. if no row is loaded depending on the other column value, I want to change the editor type of that column from combobox to datebox. How it can be made ?