string company = dtInvestigate.Rows[0]["SurveyCompanyName"].ToString();                  string[] strs = company.Split(',');                  for (int i = 0; i < strs.Length; i++)                  {                      foreach (ListItem oItem in ddlSurveyCompanyName.Items)                      {                          if (strs[i].Trim() == oItem.Value)                          {                              oItem.Selected = true;                          }                      }                  }