道具和完整财产有什么区别? [英] What is the difference between prop and a full property?

问题描述

下面的两段代码之间有什么区别吗?还是顶部只是底部的简短形式?

Is there any difference between the two pieces of code below? Or is the top just a short form of the bottom one?

public string Name { get; set; }

和

private string _Name;
public string Name
{
    get { return _Name; }
    set { _Name = value; }
}

推荐答案

唯一的区别(除了您必须在类构造函数中使用默认名称"进行初始化的事实以外)是 _Name 将在类本身内可见.该类可能会在内部引用 _Name 而不是 Name ，这一切都会正常工作，稍后您将在中添加一些逻辑名称，因为在类中使用的是 _Name ，所以不会被调用.

The only difference (other than the fact you would have to do the initialization with "Default Name" in your class constructor) is that _Name will be visible within the class itself. There's a risk that the class will internally reference _Name rather than Name, everything will work fine, and at some later point in time you'll add some logic to Name that will not be called because you're using _Name within the class.

示例:

private string _Name = "Default Name";
public string Name
{
   get { return _Name.Left(42); }  // Changed the getter
   set { _Name = value; }
}

void MyOtherMethod()
{
   string foo = _Name; // Referencing the private field accidentally instead of the public property.
   // Do something with foo
}

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