相互更新的属性 [英] Properties that update each other

问题描述

所以，在一些 C# 代码中，我有一些类似于这两个属性的东西:

So, in some C# code, I have something similar to the two properties:

private string _foo;
private string _bar;

public Foo
{
   get;
   set {
      _foo = value;
      Bar = _foo.Substring(3, 5);
   }
}

public Bar
{
   get;
   set {
      _bar = value;
      Foo = "XXX" + _bar;
   }
}

问题:C# 属性是否会受到循环引用/更新的影响，就像这个例子会导致的那样?

Question: Are C# properties subject to circular references/updates, like this example would seem to cause?

推荐答案

可以通过直接更新隐藏字段来避免死循环，像这样:

You can avoid the infinite loop by updating the hidden field directly, like this:

private string _foo;
private string _bar;

public string Foo
{
   get { return _foo; }
   set {
      _foo = value;
      _bar = _foo.Substring(3, 5);
   }
}

public string Bar
{
   get { return _bar; }
   set {
      _bar = value;
      _foo = "XXX" + _bar;
   }
}

这将绕过其他属性的 setter，从而消除循环.

This will bypass the other property's setter, which eliminates the loop.

但是...这通常会导致以后的维护问题.就我个人而言，我会尝试寻找替代设计.

But... this generally causes maintenance headaches later on. Personally, I'd try to find an alternative design.

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