protected bool CheckLogin(string UserName, string PassWord) { bool result = false; SelectCommandBuilder select = new SelectCommandBuilder("UserInfo"); select.SelectColumn("password"); select.SelectColumn("PassWordKey"); select.ConditionsColumn("operator_name", UserName); select.getSelectCommand(); DataTable dt = select.ExecuteDataTable(); string _passWord = dt.Rows[0]["password"].ToString().Trim(); string _key = dt.Rows[0]["PassWordKey"].ToString().Trim(); if (PassWord == ClassDES.Decrypt(_passWord, _key)) { result = true; } return(result); }