C# 中一些类关系的判定方法

1. IsAssignableFrom实例方法判断一个类或者接口是否继承自另一个指定的类或者接口。

public interface IAnimal { }

public interface IDog : IAnimal { }

public class Dog : IDog { }

public class Cate : IAnimal { }

public class Parrot { }

var iAnimalType = typeof(IAnimal);

var iDogType = typeof(IDog);

var dogType = typeof(Dog);

var cateType = typeof(Cate);

var parrotType = typeof(Parrot);

Console.WriteLine(iAnimalType.IsAssignableFrom(iDogType)

    ? $"{iDogType.Name} was inherited from {iAnimalType.Name}"

    : $"{iDogType.Name} was not inherited from {iAnimalType.Name}");

Console.WriteLine(iAnimalType.IsAssignableFrom(dogType)

    ? $"{dogType.Name} was inherited from {iAnimalType.Name}"

    : $"{dogType.Name} was not inherited from {iAnimalType.Name}");

Console.WriteLine(iDogType.IsAssignableFrom(dogType)

    ? $"{dogType.Name} was inherited from {iDogType.Name}"

    : $"{dogType.Name} was not inherited from {iDogType.Name}");

Console.WriteLine(iAnimalType.IsAssignableFrom(cateType)

    ? $"{cateType.Name} was inherited from {iAnimalType.Name}"

    : $"{cateType.Name} was not inherited from {iAnimalType.Name}");

Console.WriteLine(iAnimalType.IsAssignableFrom(parrotType)

    ? $"{parrotType.Name} inherited from {iAnimalType.Name}"

    : $"{parrotType.Name} not inherited from {iAnimalType.Name}");

Console.ReadKey();

输出结果：

IDog was inherited from IAnimal
Dog was inherited from IAnimal
Dog was inherited from IDog
Cate was inherited from IAnimal
Parrot not inherited from IAnimal

2.IsInstanceOfType 判断某个对象是否继承自指定的类或者接口

Dog d=new Dog();

var result=typeof(IDog).IsInstanceOfType(d);

Console.WriteLine(result? $"Dog was inherited from IDog": $"Dog was not inherited from IDog");

Console.ReadKey();

输出结果：

Dog was inherited from IDog

3.IsSubclassOf 判断一个对象的类型是否继承自指定的类，不能用于接口的判断，这能用于判定类的关系

public interface IAnimal { }

public interface IDog : IAnimal { }

public class Dog : IDog { }

public class Husky : Dog { }

public class Cate : IAnimal { }

public class Parrot { }

Husky husky = new Husky();

var result = husky.GetType().IsSubclassOf(typeof(Dog));

Console.WriteLine(result ? $"Husky was inherited from Dog" : $"Husky was not inherited from Dog");

输出结果：

Husky was inherited from Dog

这个方法不能用于接口，如果穿接口进去永远返回的都是false

Dog dog = new Dog();

var dogResult = dog.GetType().IsSubclassOf(typeof(IDog));

Console.WriteLine(dogResult);

结果：

false

巴特西

C# 中一些类关系的判定方法

1. IsAssignableFrom实例方法判断一个类或者接口是否继承自另一个指定的类或者接口。

2.IsInstanceOfType 判断某个对象是否继承自指定的类或者接口

3.IsSubclassOf 判断一个对象的类型是否继承自指定的类，不能用于接口的判断，这能用于判定类的关系

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巴特西

C# 中一些类关系的判定方法

1. IsAssignableFrom实例方法 判断一个类或者接口是否继承自另一个指定的类或者接口。

2.IsInstanceOfType 判断某个对象是否继承自指定的类或者接口

3.IsSubclassOf 判断一个对象的类型是否继承自指定的类，不能用于接口的判断，这能用于判定类的关系

最新文章

热门文章

1. IsAssignableFrom实例方法判断一个类或者接口是否继承自另一个指定的类或者接口。