private void btnSave_Click(object sender, RoutedEventArgs e) { ModelHoliday db = new ModelHoliday(); tbl_ApplicationData myApp = new tbl_ApplicationData(); myApp.ApplicationDescription = Application_description.Text; myApp.ApplyingDate = Applying_date.SelectedDate; if (Ending_date.SelectedDate != null) { myApp.EndingDate = (DateTime)Ending_date.SelectedDate; } if (Starting_date != null) { myApp.StartingDate = (DateTime)Starting_date.SelectedDate; } myApp.UserName = User_name.Text; myApp.LeavePurpose = Leave_purpose.Text; myApp.LeaveTypeId = Convert.ToInt32(Leave_type_id.Text); myApp.NoOfDays = Convert.ToInt32(numbers_of_days.Text); db.tbl_ApplicationData.Add(myApp); db.SaveChanges(); MainWindow.cframe.Source = new Uri(@"Pages/AdminHomePage.xaml", UriKind.RelativeOrAbsolute); }