这个初始化方法之间的区别是什么？ [英] What is the difference between this initialization methods?

问题描述

大家好
这两codeS之间的区别是什么？

Hi all
What is the difference between this two codes?

class SomeClass   
{   

   SomeType val = new SomeType();   

}   

和

class SomeClass  
{      
   SomeType val;   

   SomeClass()   
   {   
       val = new SomeType();   
   }   

}   

哪种方法preFERD？

Which method is preferd?

推荐答案

目前的几乎的他们之间没有区别。场的分配将在这两种情况下在构造内发生。有一个在如何happpens相对于基类的构造函数，虽然有差别。看看下面的code：

There is almost not difference between them. The assignment of the field will happen within the constructor in both cases. There is a difference in how this happpens in relation to base class constructors though. Take the following code:

class Base
{
    public Base()
    {

    }
}

class One : Base
{
    string test = "text";
}

class Two : Base
{
    string test;
    public Two()
    {
        test = "text";
    }
}

在这种情况下，基类的构造函数将被调用的在的领域分配中的类一，而在分配类两个。

In this case the base class constructor will be invoked after the field assignment in the class One, but before the assignment in class Two.

这篇关于这个初始化方法之间的区别是什么？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！