There should not be a problem to use one and the same custom column editor for more than one columns as long as it is compatible with them all and properly created. I tested it on this RadGrid demo
by setting the ColumnEditorID
to point to the same editor for one more of the GridBoundColumns.
Could you please elaborate on how you are creating the editor and how you are assigning it to the columns?
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items