C#从另一个的主体调用一个构造函数 [英] C# call one constructor from the body of another

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问题描述

我需要从另一个构造函数中调用另一个构造函数,该怎么做?



基本上

  class foo {
public foo(int x,int y)
{
}

public foo )
{
// ... do something

//调用另一个构造函数
this(x,y); //不工作
foo(x,y); // not
}
}


解决方案



您必须找到一种链接构造函数的方法,如:

  public foo(int x,int y){} 
public foo(string s):this(XFromString(s),YFromString }

或将建筑代码移动到常用设置方法,例如:

  public foo(int x,int y){Setup(x,y); } 
public foo(string s)
{
// do stuff
int x = XFromString(s);
int y = YFromString(s);
Setup(x,y);
}

public void Setup(int x,int y){...}


I need to call one constructor from the body of another one, how to do that?

Basically

class foo {
    public foo (int x, int y)
    {
    }

    public foo (string s)
    {
        // ... do something

        // call another constructor
        this (x, y); // doesn't work
        foo (x, y); // neither
    }
}

解决方案

You can't.

You'll have to find a way to chain the constructors, as in:

public foo (int x, int y) { }
public foo (string s) : this(XFromString(s), YFromString(s)) { ... }

or move your construction code into a common setup method, like this:

public foo (int x, int y) { Setup(x, y); }
public foo (string s)
{
   // do stuff
   int x = XFromString(s);
   int y = YFromString(s);
   Setup(x, y);
}

public void Setup(int x, int y) { ... }

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