/// <summary> /// 判断用用户名是否存在 /// </summary> /// <param name="loginName">登录名</param> /// <returns></returns> public static Operator GetOperatorByLoginName(string loginName) { Operator op = null; foreach (Operator item in operators) { if (item.LoginName == loginName) { op = item; } } if (op != null) { return(op); } else { op = null; op = Provider.GetOperatorByLoginName(loginName); if (op != null) { operators.Add(op); return(op); } else { return(null); } } }