The grid's API has been refactored a bit in the latest version, sorry if this caused you any inconvenience.
To reach the filtering functionality, please use the following code:
|GridViewDataColumn column = radGridView1.MasterGridViewTemplate.Columns["my_column"] as GridViewDataColumn; |
|column.Filter.Function = GridKnownFunction.Contains; |
|column.Filter.StringValue = "my value"; |
Please, let us know if you have any other questions.
the Telerik team