Kister/Csharp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

添加Lesson19

Browse Source
This commit is contained in:
Kister Hakusan
2025-09-14 16:31:09 +08:00
parent c16355e935
commit 372d55923a
5 changed files with 408 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
C#核心/C#核心.sln
+12
View File
@@ -39,6 +39,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson18_多态-抽象类
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson18_多态-抽象类和抽象方法练习", "Lesson18_多态-抽象类和抽象方法练习\Lesson18_多态-抽象类和抽象方法练习.csproj", "{7004726B-5B33-4B2A-ADDB-EF22DA593630}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson19_多态-接口", "Lesson19_多态-接口\Lesson19_多态-接口.csproj", "{FC39DDE9-AC80-40A2-9CCA-DC06510A8881}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson19_多态-接口练习", "Lesson19_多态-接口练习\Lesson19_多态-接口练习.csproj", "{D511EDF3-7769-45BB-8304-3081918FA633}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@@ -117,6 +121,14 @@ Global
{7004726B-5B33-4B2A-ADDB-EF22DA593630}.Debug|Any CPU.Build.0 = Debug|Any CPU
{7004726B-5B33-4B2A-ADDB-EF22DA593630}.Release|Any CPU.ActiveCfg = Release|Any CPU
{7004726B-5B33-4B2A-ADDB-EF22DA593630}.Release|Any CPU.Build.0 = Release|Any CPU
{FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Debug|Any CPU.Build.0 = Debug|Any CPU
{FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Release|Any CPU.ActiveCfg = Release|Any CPU
{FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Release|Any CPU.Build.0 = Release|Any CPU
{D511EDF3-7769-45BB-8304-3081918FA633}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{D511EDF3-7769-45BB-8304-3081918FA633}.Debug|Any CPU.Build.0 = Debug|Any CPU
{D511EDF3-7769-45BB-8304-3081918FA633}.Release|Any CPU.ActiveCfg = Release|Any CPU
{D511EDF3-7769-45BB-8304-3081918FA633}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
C#核心/Lesson19_多态-接口/Lesson19_多态-接口.csproj
+11
View File
@@ -0,0 +1,11 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<RootNamespace>Lesson19_多态_接口</RootNamespace>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
</Project>
C#核心/Lesson19_多态-接口/Program.cs
+189
View File
@@ -0,0 +1,189 @@
namespace Lesson19_多态_接口
{
#region 知识点一 接口的概念
//接口是行为的抽象规范
//他也是一种自定义类型
//关键字 interface
//接口声明的规范
//1.不包含成员变量
//2.只包含方法、属性、索引器、事件
//3.成员不能被实现
//4.成员可以不用写访问修饰符，不能是私有的
//5.接口不能继承类，但是可以继承另一个接口
//接口的使用规范
//1.类可以继承多个接口
//2.类继承接口后，必须实现接口中所有成员
//特点：
//1.他和类的声明类似
//2.接口是用来继承的
//3.接口不能被实例化，但是可以作为容器存储对象
#endregion
#region 知识点二 接口的声明
//接口的关键字：interface
//语法：
//interface 接口名
//{
//}
//一句话记忆：接口是抽象行为的基类
//接口命名规范 帕斯卡前面加个I
interface IFly
{
//int a;不能包含成员变量
void Fly();//可以加public和protect，不能加private这样违反了上面使用规范知识点的2
string Name
{
get;
set;
}
int this[int index]
{
get;
set;
}
event Action doSomthing;//先不学事件声明
}
#endregion
#region 知识点三 接口的使用
class Animal
{
}
//接口用来继承
//1.类可以继承1个类，n个接口
//2.继承了接口后 必须实现其中的内容 并且必须是public的
class Human : Animal, IFly
{
public int this[int index]
{
get
{
return 0;
}
set
{
this[index] = value;
}
}
public string Name
{
get;
set;
}
public event Action doSomthing;
//3.实现的接口函数，可以通过加virtual再在子类中重写
//4.接口也遵循里氏替换原则
public virtual void Fly()
{
Console.WriteLine("人飞");
}
}
#endregion
#region 知识点四 接口可以继承接口
//接口继承接口时 不需要实现
//待类继承接口后 类自己去实现所有内容
interface IWalk
{
void Walk();
}
interface IMove : IFly,IWalk
{
void Move();
}
class Test : IMove
{
public int this[int index] { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
public string Name { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
public event Action doSomthing;
public void Fly()
{
throw new NotImplementedException();
}
public void Move()
{
throw new NotImplementedException();
}
public void Walk()
{
throw new NotImplementedException();
}
}
#endregion
#region 知识点五 显示实现接口
//当一个类继承两个接口
//但是接口中存在着同名方法时
//注意：显示实现接口时 不能写访问修饰符
interface IAtk
{
void Atk();
}
interface ISuperAtk
{
void Atk();
}
class Player : ISuperAtk, IAtk
{
void ISuperAtk.Atk()//显示实现接口就是 接口名.方法
{
throw new NotImplementedException();
}
void IAtk.Atk()
{
throw new NotImplementedException();
}
public void Atk()
{
throw new NotImplementedException();
}
}
#endregion
internal class Program
{
static void Main(string[] args)
{
//IFly f = new IFly();不能被实例化
IFly f = new Human();//可以用里氏替换原则
f.Fly();
IMove m = new Test();
IFly f2 = new Test();
IWalk w = new Test();
IAtk ia = new Player();
ISuperAtk isa = new Player();
Player p = new Player();
(p as IAtk).Atk();
(p as ISuperAtk).Atk();
p.Atk();
}
}
// 总结:
// 继承类：是对象间的继承，包括特征行为等等
// 继承接口：是行为间的继承，继承接口的行为规范，按照规范去实现内容
// 由于接口也是遵循里氏替换原则，所以可以用接口容器装对象
// 那么久可以实现 装载各种毫无关系但是却有相同行为的对象
// 注意:
//1. 接口值包含 成员方法、属性、索引器、事件，并且都不实现，都没有访问修饰符
//2. 可以继承多个接口，但是只能继承一个类
//3. 接口可以继承接口，相当于在进行行为合并，待子类继承时再去实现具体的行为
//4. 接口可以被显示实现 主要用于实现不同接口中的同名函数的不同表现
//5. 实现的接口方法 可以加 virtual 关键字 之后子类 再重写
}
C#核心/Lesson19_多态-接口练习/Lesson19_多态-接口练习.csproj
+11
View File
@@ -0,0 +1,11 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<RootNamespace>Lesson19_多态_接口练习</RootNamespace>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
</Project>
C#核心/Lesson19_多态-接口练习/Program.cs
+185
View File
@@ -0,0 +1,185 @@
using Lesson19_多态_接口练习;
namespace Lesson19_多态_接口练习
{
interface ICheck
{
public void Check();
}
class Person : ICheck
{
public void Check()
{
Console.WriteLine("派出所登记");
}
}
class Car
{
public void Check()
{
Console.WriteLine("车管所登记");
}
}
class House
{
public void Check()
{
Console.WriteLine("房管局登记");
}
}
interface IFly
{
public void Fly();
}
interface IWalk
{
public void Walk();
}
interface ISwim
{
public void Swim();
}
class Sparrow : IFly, IWalk
{
public void Fly()
{
Console.WriteLine("麻雀飞");
}
public void Walk()
{
Console.WriteLine("麻雀走");
}
}
class Ostrich : IWalk
{
public void Walk()
{
Console.WriteLine("鸵鸟走");
}
}
class Penguin : IWalk, ISwim
{
public void Walk()
{
Console.WriteLine("企鹅走");
}
public void Swim()
{
Console.WriteLine("企鹅游泳");
}
}
class Parrot : IFly, IWalk
{
public void Fly()
{
Console.WriteLine("鹦鹉飞");
}
public void Walk()
{
Console.WriteLine("走");
}
}
class Helicopter : IFly
{
public void Fly()
{
Console.WriteLine("直升机飞");
}
}
class Swan : IFly, IWalk, ISwim
{
public void Fly()
{
Console.WriteLine("天鹅飞");
}
public void Walk()
{
Console.WriteLine("天鹅走");
}
public void Swim()
{
Console.WriteLine("天鹅游泳");
}
}
interface IUSB
{
void ReadData();
}
class StorageDevice : IUSB
{
public string name;
public StorageDevice(string name)
{
this.name = name;
}
public void ReadData()
{
Console.WriteLine("USB{0}传输数据",name);
}
}
class MP3 : IUSB
{
public void ReadData()
{
Console.WriteLine("MP3传输数据");
}
}
class Computer
{
public IUSB usb1;
}
internal class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
Person p1= new Person();
p1.Check();
Car c1 = new Car();
c1.Check();
House h1 = new House();
h1.Check();
Sparrow s1 = new Sparrow();
s1.Walk();
s1.Fly();
Ostrich o1 = new Ostrich();
o1.Walk();
Penguin p2 = new Penguin();
p2.Swim();
p2.Walk();
Parrot p3 = new Parrot();
p3.Walk();
p3.Fly();
Helicopter h2 = new Helicopter();
h2.Fly();
Swan s3 = new Swan();
s3.Walk();
s3.Fly();
s3.Swim();
StorageDevice hd = new StorageDevice("移动硬盘");
StorageDevice ud = new StorageDevice("U盘");
MP3 mp3 = new MP3();
Computer computer = new Computer();
computer.usb1 = hd;
computer.usb1.ReadData();
computer.usb1 = ud;
computer.usb1.ReadData();
computer.usb1 = mp3;
computer.usb1.ReadData();
}
}
}