I used the solution posted to implement filtering and sorting for a GridButtonColumn. I have one issue, the FilterControlWidth property is not being applied to the page when filtering is enabled. The text box that is added when filtering is turned on is always the same size as the column header. Any suggestions?
<cc1:GridButtonColumnWithFilteringSorting DataTextField="Form" DataField="Form" SortExpression="Form" HeaderText="Form Number" HeaderButtonType="TextButton" CommandName="OpenCommand" UniqueName="IdLink" DataType="System.String" FilterControlWidth="50px">
<headerstyle width="80px" />
</cc1:GridButtonColumnWithFilteringSorting>