Database

public ActionResult showDDL(int? EmplID = null) 
        {
            ViewBag.EmplID = EmplID;
            if (EmplID == null) 
            {
                IEnumerable<GetAtdRecord_SpResult> EmployeeAtd_2 = DataContext.GetAtdRecord_Sp(0).ToList();
                return View(EmployeeAtd_2);
            }
            else if (EmplID != null) 
            {
                IEnumerable<GetAtdRecord_SpResult> EmployeeAtd_2 = DataContext.GetAtdRecord_Sp(EmplID).ToList();
                return View(EmployeeAtd_2);
            }
            
            return View();
        }

@{
 
     var grid = new WebGrid(ViewData.Model, defaultSort: "EmplID", rowsPerPage: 20);
    
  }
  
@if (Model.Count > 0)
{
  <div id="AllEmpGrid_ByName">
   @grid.GetHtml(columns: grid.Columns(
                                        grid.Column("EmplID", "Employee ID"),
                                        grid.Column("EmplName", "Employee Name"),
                                        grid.Column("ShiftID", "Shift ID"),
                                        grid.Column("DateVisited", "Date of Visit"),
                                        grid.Column("InTime", "In Time"),
                                        grid.Column("TimeOut", "Time Out"),
                                        grid.Column("OverTime", "Over Time"),
                                        grid.Column("TotalWorkingTime", "Total Working Time")
                                      ))
 </div>
 
 using (Html.BeginForm("ToExcel", "Home", FormMethod.Get))
 {
   <button type="submit" class="button_form button_download" >Download in Excel</button>
 }
 
}
else
{
    <h2 class="error" >No Data Found</h2> 
}

public ActionResult ToExcel(int? empid )
        {
            var DataContext = new EmployeeRecordDataContext();
            
            var grid = new GridView();
            grid.DataSource = DataContext.GetAtdRecord_Sp(null).ToList();
            grid.DataBind();

            Response.ClearContent();
            Response.Buffer = true;
            Response.AddHeader("content-disposition", "attachment; filename=AttendanceSheet.xls");
            Response.ContentType = "application/ms-excel";

            Response.Charset = "";
            StringWriter sw = new StringWriter();
            System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);

            grid.RenderControl(htw);

            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();
            return RedirectToAction("index");
        }

Empid   EmplName  TotalWorkingHours TotalOvertime  Month
00001   John      77:00               05:55       2013-02
00002   Masn      57:00               04:56       2013-02

with times as (
SELECT    t1.EmplID
        , t3.EmplName
        , min(t1.RecTime) AS InTime
        , max(t2.RecTime) AS [TimeOut]
        , t4.ShiftId as ShiftID
        , t4.StAtdTime as ShStartTime
        , t4.EndAtdTime as ShEndTime
        , cast(min(t1.RecTime) as datetime) AS InTimeSub
        , cast(max(t2.RecTime) as datetime) AS TimeOutSub
        , t1.RecDate AS [DateVisited]
FROM  AtdRecord t1 
INNER JOIN 
      AtdRecord t2 
ON    t1.EmplID = t2.EmplID 
AND   t1.RecDate = t2.RecDate
AND   t1.RecTime < t2.RecTime
inner join 
      HrEmployee t3 
ON    t3.EmplID = t1.EmplID 
inner join AtdShiftSect t4
ON t3.ShiftId = t4.ShiftId
group by 
          t1.EmplID
        , t3.EmplName
        , t1.RecDate
        , t4.ShiftId 
        , t4.StAtdTime 
        , t4.EndAtdTime
)
SELECT 
 EmplID
,EmplName
,ShiftId As ShiftID
,InTime
,[TimeOut]
,convert(char(5),cast([TimeOutSub] - InTimeSub as time), 108) TotalWorkingTime
,[DateVisited]
,CASE WHEN [InTime] IS NOT NULL AND [TimeOut] IS NOT NULL THEN
     CONVERT(char(5),CASE WHEN  CAST([TimeOutSub] AS DATETIME) >= ShEndTime And ShiftID = 'S002' Then  LEFT(CONVERT(varchar(12), DATEADD(ms, DATEDIFF(ms, CAST(ShEndTime AS DATETIME),CAST([TimeOutSub] AS DATETIME)),0), 108),5) 
                          WHEN  CAST([TimeOutSub] AS DATETIME) >= ShEndTime And ShiftID = 'S001' Then  LEFT(CONVERT(varchar(12), DATEADD(ms, DATEDIFF(ms, CAST(ShEndTime AS DATETIME),  CAST([TimeOutSub] AS DATETIME)),0), 108),5) 
      ELSE '00:00' END, 108) 
 ELSE 'ABSENT' END AS OverTime
 FROM times order by EmplID, ShiftID, DateVisited