protected void btnUpdate_Click(object sender, EventArgs e) { TMSEntityLayer.EF.Training tr = new Training(); tr.TrainingID = tid; tr.StartDate = Convert.ToDateTime(txtSD.Text); tr.EndDate = Convert.ToDateTime(txtED.Text); //var n = ; tr.DomainID = Convert.ToByte(ddlDomain.SelectedItem.Value); tr.Title = txtName.Text; tr.Credits = byte.Parse(txtCredits.Text); tr.Status = 1; mtr.Update(tr); Server.TransferRequest("~/Admin/EFManageTraining.aspx"); }