All of my regular combobox has IsEditable=true and IsReadOnly=true.  So the user can type more than just the first letter to search through the list.

I tried to apply the same thing (by declaring a style first, then assign the EditorStyle of the comboboxcolumn), but the comboBox still looks like the same.

Hello Edward,

You can try setting IsComboBoxEditable property of GridViewComboBoxColumn.

Kind regards,
Maya
the Telerik team