title: Radgrid string column datatype to add Greater Than
body: <p>I want to add Greater Than in String Type of RadGrid Column in Filter time. If you keep datetime datatype of column then the filter dropdownlist shows "greater than,less than" but when I keep the string datatype then it doesn't show greater than.</p>
  
  <p>I would like to add in the dropdownlist greater than because my requirment to match string greater than <a href="http://demos.telerik.com/aspnet-ajax/grid/examples/generalfeatures/filtering/defaultcs.aspx" rel="nofollow">like this</a></p>
  
  <p>But I want to add this condition in the dropdown, please can you tell me how to add this to the filter dropdownlist</p>