为什么属性集抛出异常计算器？ [英] Why does Property Set throw StackOverflow exception?

问题描述

我知道Java和通常会放在getter / setter方法​​。我感兴趣的是在C＃中使用以下code这样做，但它抛出一个异常计算器。我在做什么错了？

调用code

  c.firstName =A;
 

属性code

 公共字符串的firstName;
{
    得到
    {
        返回的firstName;
    }
    组
    {
        的firstName =价值;
    }
}
 

解决方案

这是因为你在递归调用的属性 - 在设置你重新设置该属性，它继续的循环往复的，直到你吹堆栈。

您需要的私人支持字段保存的价值，例如

 私人字符串的firstName;公共字符串名字
{
    得到
    {
        返回this.firstName;
    }
    组
    {
        this.firstName =价值;
    }
}
 

另外，如果你正在使用C＃3.0中，你可以使用自动属性，它会创建一个隐藏的后备字段，例如

 公共字符串名字{获得;组; }
 

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?

Calling Code

c.firstName = "a";

Property Code

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

解决方案

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.

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;
    }
}

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; }

这篇关于为什么属性集抛出异常计算器？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！