为什么 Property Set 会抛出 StackOverflow 异常? [英] Why does Property Set throw StackOverflow exception?

问题描述

我知道 java 并且通常会使用 getter/setter 方法.我有兴趣使用以下代码在 C# 中执行此操作，但它会引发 StackOverflow 异常.我做错了什么?

I know java and would normally put in getter/setter methods. I am interested in doing it in C# with the following code, but it throws a StackOverflow exception. What am I doing wrong?

调用代码

c.firstName = "a";

属性代码

public String firstName;
{
    get
    {
        return firstName;
    }
    set
    {
        firstName = value;
    }
}

推荐答案

这是因为您正在递归调用该属性 - 在 set 中您再次设置该属性，继续ad无限，直到你把堆栈炸毁.

It's because you're recursively calling the property - in the set you are setting the property again, which continues ad infinitum until you blow the stack.

您需要一个私有支持字段来保存值，例如

You need a private backing field to hold the value, e.g.

private string firstName;

public string FirstName
{
    get
    {
        return this.firstName;
    }
    set
    {
        this.firstName = value;
    }
}

或者，如果您使用的是 C# 3.0，您可以使用自动属性，它会为您创建一个隐藏的支持字段，例如

Alternatively, if you're using C# 3.0, you could use an auto-property, which creates a hidden backing field for you, e.g.

public string FirstName { get; set; }

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