gridview related function

protected string GetPerformance(object perf,object usl,object lsl)
   {
       string strper=perf.ToString();
       int i = Convert.ToInt32(strper);

       string strusl = usl.ToString();
       int j = Convert.ToInt32(strusl);

       string strlsl = lsl.ToString();
       int k= Convert.ToInt32(strusl);

       if (strper < strlsl)
       {
           return YES;
       }
       else
       {
           return 0;
       }
   }