Beispiel #1
0
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("欢迎来到.net高级班vip课程,今天的内容是特性和AOP");
                {
                    Student student = new Student();
                    student.Id   = 123;
                    student.Name = "MrSorry";
                    student.QQ   = 123456;
                    student.Study();
                    string result = student.Answer("Eleven");


                    Manager.Show(student);

                    student.Name = "布墨";
                    student.QQ   = 9999;
                    Manager.Show(student);
                }
                {
                    UserState userState = UserState.Normal;
                    //if (userState == UserState.Normal)
                    //{
                    //    Console.WriteLine("正常状态");
                    //}
                    //else if (userState == UserState.Frozen)
                    //{ }
                    //else
                    //{ }
                    Console.WriteLine(userState.GetRemark());
                    Console.WriteLine(RemarkExtension.GetRemark(userState));
                }
                {
                    Console.WriteLine(UserState.Frozen.GetRemark());
                    Console.WriteLine(UserState.Deleted.GetRemark());
                }
                {
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            Console.Read();
        }
Beispiel #2
0
        static void Main(string[] args)
        {
            // 示例一
            BaseClass    b = new BaseClass();
            DerivedClass d = new DerivedClass();

            // 查看类上的 特性
            // Display custom attributes for each class.
            Console.WriteLine("Attributes on Base Class:");
            object[] attrs = b.GetType().GetCustomAttributes(true);
            foreach (Attribute attr in attrs)
            {
                Console.WriteLine(attr);
            }

            Console.WriteLine("Attributes on Derived Class:");
            attrs = d.GetType().GetCustomAttributes(true);
            foreach (Attribute attr in attrs)
            {
                Console.WriteLine(attr);
            }

            // 示例2
            // 读取添加的特性的信息
            GetAttributeInfoByReflectionTest.Test();

            // 示例3
            // 获取 Student类上的特性
            var type = typeof(Student);

            if (type.IsDefined(typeof(CustomAttribute), true))
            {
                CustomAttribute attribute = type.GetCustomAttribute <CustomAttribute>();

                Console.WriteLine($"{attribute.Description} {attribute.Remark}");
            }
            // 获取属性上的特性
            PropertyInfo propertyInfo = type.GetProperty("Id");

            if (propertyInfo.IsDefined(typeof(CustomAttribute), true))
            {
                CustomAttribute attribute = propertyInfo.GetCustomAttribute <CustomAttribute>();

                Console.WriteLine($"{attribute.Description} {attribute.Remark}");
            }
            // 获取方法上的特性
            MethodInfo methodInfo = type.GetMethod("Answer");

            if (methodInfo.IsDefined(typeof(CustomAttribute), true))
            {
                CustomAttribute attribute = methodInfo.GetCustomAttribute <CustomAttribute>();

                Console.WriteLine($"{attribute.Description} {attribute.Remark}");
            }

            // 获取方法参数上的特性
            ParameterInfo parameterInfo = methodInfo.GetParameters()[0];

            if (parameterInfo.IsDefined(typeof(CustomAttribute), true))
            {
                CustomAttribute attribute = parameterInfo.GetCustomAttribute <CustomAttribute>();

                Console.WriteLine($"{attribute.Description} {attribute.Remark}");
            }

            // 获取返回值 上的 特性
            ParameterInfo returnParameterInfo = methodInfo.ReturnParameter;

            if (returnParameterInfo.IsDefined(typeof(CustomAttribute), true))
            {
                CustomAttribute attribute = returnParameterInfo.GetCustomAttribute <CustomAttribute>();

                Console.WriteLine($"{attribute.Description} {attribute.Remark}");
            }


            // 获取枚举值 前端显示名称
            {
                Console.WriteLine(UserState.Normal.GetRemark());
                Console.WriteLine(UserState.Frozen.GetRemark());
                Console.WriteLine(UserState.Deleted.GetRemark());
                Console.WriteLine(RemarkExtension.GetRemark(UserState.Deleted));
            }

            // 使用 特性 进行 数据合法性校验
            {
                var student1 = new Student()
                {
                    QQ = 5
                };
                var student2 = new Student()
                {
                    QQ = 6
                };
                Console.WriteLine(student1.QQ.Validate());
                Console.WriteLine(student2.QQ.Validate());
            }
        }