在 C# 中定义 set 访问器时如何避免堆栈溢出错误

问题描述

stackoverflow 的人.我是 c# 的新手，这是我第一次无法找到我的一个基本问题的答案.谁能帮帮我?！我正在尝试为公共实例字段定义集合逻辑.

People of stackoverflow. I am new to c# and this is the first time I have not been able to find an answer to one of my elementary questions. Who can help me?!I am trying to define set logic for a public instance field.

运行完美，

公共字符串标题{get;设置;}

public string Headline {get; set;}

这会导致堆栈溢出

公共字符串标题
{得到{返回标题；}放{标题=价值；}}

public string Headline
{ get { return Headline; } set { Headline = value; } }

推荐答案

你在递归调用getter和setter(无限调用自己)，不可避免地导致堆栈溢出.

You're calling the getter and setter recursively (calling themselves infinitely), inevitably causing a stack overflow.

这就是你的意思:

private string headline;
public string Headline
{
    get { return headline; }
    set { headline = value; }
}

请注意，如果您不打算引入任何进一步的 get/set 逻辑，则这是不必要的，因为这正是您的第一个示例在幕后所做的.

Note that this is unnecessary if you don't plan to introduce any further get/set logic, as this is exactly what your first example does behind the scenes.

在学习 c# 中的属性时，最好不要将它们视为数据，而是将其视为具有以下签名的一对方法:

When learning about properties in c#, it helps to think of them not as data, but as a pair of methods with the following signatures:

public string get_Headline() { ... }
public void set_Headline(string value) { ... }

事实上，这正是编译器定义它们的方式.

In fact, this is exactly how the compiler defines them.

现在很容易看出您的初始代码会递归调用 set_Headline.

Now it's easy to see that your initial code would call set_Headline recursively.

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