title: Remove commas in group tree
body: <p>I created a report in a VB.Net application and I'm using the Crystal Reports Viewer control to display it.  The report is grouped by a field that's an integer datatype.  I've been successful in formatting the field to a string so that it displays properly on the report (i.e., without any thousdand separators or decimals).</p>
  
  <p>The problem now is that when I open the Group Tree in the viewer, the field is being treated as an integer (with the thousand separators).  I've attempting following the solutions in these articles <a href="http://www.codeproject.com/Questions/179555/Avoiding-thousand-separator-in-Crystal-Report-Fiel" rel="nofollow noreferrer">article1</a>, <a href="https://stackoverflow.com/questions/13472161/how-to-remove-comma-from-crystal-report-string-and-from-integer-field">article2</a>, <a href="http://scn.sap.com/thread/965536" rel="nofollow noreferrer">article3</a>, but they only address formatting the display of the field (which I'm not having a problem with).</p>
  
  <p>So how to I format the display of an integer as string on the Group Tree, not the report itself?</p>