I'm using trying to use a GridMultiColumnDropDownList in an SfDataGrid.
Basically, I need to have a user be able to start typing directly into the cell (or click on the cell) and have the DDL automatically drop down. I have the datagrid EditTrigger property set to "OnTap" and NavigationMode="Cell". It works fine with a TextBox or any other control.
I also need to be able to define which columns are displayed in the DropDown.