protected void btnAttendenceList_Click(object sender, EventArgs e)
 {
     try
     {
         string filename = "Attendance For -" + lblExamName.Text;
         DropDownManager.GenerateExcel(GetTableForExecl(), filename, "Attendance", Response);
     }
     catch (Exception ex)
     {
         ErrorMessage.Text = ex.Message;
     }
 }
 protected void btnPriEntry_Click(object sender, EventArgs e)
 {
     try
     {
         string filename = "Entry Schedule For-" + lblExamName.Text;
         DropDownManager.GenerateExcel(BuildTableForExcelPrimary(), filename, "Pri_Entry", Response);
     }
     catch (Exception ex)
     {
         ErrorMessage.Text = ex.Message;
     }
 }