C#获取变量名的扩展方法

        /// <summary>
        /// 获取变量名称(字符串)
        /// 警告不能在匿名方法里写其它否则报错
        /// </summary>
        /// <param name="var_name">要获取变量名的变量</param>
        /// <returns>变量名</returns>
        public static string GetVarName<T>(this T var_name)
        {
            System.Linq.Expressions.Expression<Func<T, T>> exp = GetExpression<T>(q => var_name);
            return ((System.Linq.Expressions.MemberExpression)exp.Body).Member.Name;
        }

        /// <summary>
        /// 获取对应的数据结构
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="exp"></param>
        /// <returns></returns>
        private static System.Linq.Expressions.Expression<Func<T, T>> GetExpression<T>(System.Linq.Expressions.Expression<Func<T, T>> exp)
        {
            return exp;
        }