protected override string Save() { using (PriemEntities context = new PriemEntities()) { int?KCPCel; int j; if (int.TryParse(tbKCPCel.Text.Trim(), out j)) { KCPCel = j; } else { KCPCel = null; } context.Entry_UpdateCEl(GuidId, KCPCel); } return("true"); }