public bool AddDuty() { bool b = true; tdd.d_name = txtName.Text.Trim(); tdd.d_depict = txtName2.Text; tdd.d_flag = DropDownList1.SelectedValue; if (td.GetModelList("d_name = '" + tdd.d_name + "' and d_flag='" + tdd.d_flag + "'").Count == 0) { int a = td.Add(tdd); tdyy.dy_did = a.ToString(); tdy.Add(tdyy); } else { b = false; } return(b); }