public IQueryable <AttendanceViewModel> GetAttendanceForExcel(string empId)
{
if (string.IsNullOrEmpty(empId))
{
return(null);
}
Guid id = Guid.Parse(empId);
var listEMP = bll.GetAttendanceForExcel(id).ToList();
var list = bll.GetAttendanceForExcel(id).ToDictionary(p => p.EmpId);
var results = listEMP.GroupBy(P => P.EmpId).ToDictionary(group => group.Key, group => group.ToList());
return(bll.GetAttendanceForExcel(id).AsQueryable());
}