protected void GetHalfTermAttendance_Click(object sender, EventArgs e) { DateRange dr; using (WebhostEntities db = new WebhostEntities()) { // Select a term. DateTime midtermDate; try { midtermDate = DateRange.GetDateTimeFromString(MidTermDateInput.Text); } catch (InvalidCastException) { ((Default)Page.Master).ShowError("Invalid Date Range Selected.", String.Format("Could not parse date from '{0}' to a valid DateTime.", MidTermDateInput.Text)); return; } List <Term> terms = db.Terms.Where(t => t.StartDate <midtermDate && t.EndDate> midtermDate).ToList(); if (terms.Count < 1) { return; } DateTime termdate = (BeforeOrAfter.SelectedIndex == 0) ? terms[0].StartDate : terms[0].EndDate; dr = new DateRange(midtermDate, termdate); } CSV quick = AttendanceControl.GetQuickOverview(dr); quick.Save(Server.MapPath("~/Temp/HalfTermAttendance.csv")); Response.Redirect("~/Temp/HalfTermAttendance.csv"); }