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();
}
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());
}
}
