C#析構器 deconstuctor
概念
類的deconstructor,叫做析構器或者分解式.作用是把類的對象分解成多個變量並返回.
說明
- 方法名固定為Deconstruct,不能修改
- 可以被重載
- 有一個或多個out參數
- 可以是擴展方法.
舉例
using System;
namespace Test {
class Program {
static void Main (string[] args) {
Person person = new Person ("張三", 23);
// 寫法1
int age1;
string name1;
(name1, age1) = person;
Console.WriteLine ($"{name1}今年{age1}歲!");
// 寫法2
(string name2, int age2) = person;
Console.WriteLine ($"{name2}今年{age2}歲!");
// 寫法3
int age3;
string name3;
person.Deconstruct (out name3, out age3);
Console.WriteLine ($"{name3}今年{age3}歲!");
// 寫法4
person.Deconstruct (out string name4, out int age4);
Console.WriteLine ($"{name4}今年{age4}歲!");
// 寫法5
var (name5, age5) = person;
Console.WriteLine ($"{name5}今年{age5}歲!");
}
}
class Person {
public int Age { get; set; }
private string Name { get; set; }
public Person () {
Age = 1;
Name = "張三";
}
public Person (string name, int age) {
Name = name;
Age = age;
}
public void Deconstruct (out string name, out int age) {
name = Name;
age = Age;
}
}
}