在C＃集合堆栈溢出错误/获取 [英] Stack overflow error in C# set/get

问题描述

我是工作在上周五的应用程序的公众意见一部分，当我得到一个堆栈溢出错误，这迷惑了我，所以我想我会寻求帮助。和搜索使用表达式堆栈溢出的网页是有点弄巧成拙！

I was working on a public comments part of an application on Friday when I got a stack overflow error, which confused me so I thought I'd ask for help. And searching the web using the expression 'stack overflow' is a bit self-defeating!

我希望做一个的HTMLEncode场上的SET语句中的类，之前发送的类的实例被添加到数据库：

I wanted to do an HtmlEncode on the set statement of the field in the class, before sending an instance of the class to be added to the database:

public class Feedback
{

    public Feedback() { }

    public string FeedbackComment
    {
        get { return FeedbackComment; }
        set {System.Web.HttpUtility.HtmlEncode(value); }
    }

    // other fields 

    // methods
}

这是造成计算器的错误，我已经通过更改代码修复的错误是这样的：

This was causing StackOverflow errors, I've fixed the error by changing the code to look like this:

public class Feedback
{

    public Feedback() { }

    private string feedbackComment;

    public string FeedbackComment
    {
        get { return feedbackComment; }
        set { feedbackComment = System.Web.HttpUtility.HtmlEncode(value); }
    }

    // other fields 

    // methods
} 

但我只是想为什么第一个GET / SET语句是如此递归他们造成堆栈溢出的解释，但恢复的代码时，看起来更像是C＃2.0的工作？ ？！请尽量温柔

But I just wanted an explanation of why the first get/set statements were so recursive that they caused a stack overflow but when reverting the code to look more like c#2.0 worked? Can this be achieved with the shorter syntax and if so how?

这是我的第一个问题上，所以要实现

This is my first question on SO - please try to be gentle!

推荐答案

第一实施例的吸气剂返回属性本身，而不是一个后备字段。

The getter of the first example is returning the property itself, not a backing field.

// The property name is "FeedbackComment"
public string FeedbackComment
{
    // And here you are returning "FeedbackComment" which is
    // creating the stack overflow
    get { return FeedbackComment; }
}

不幸的是没有办法缩短你有什么，可自动实现的属性（即公共字符串FeedbackComment {获取;设置;} ）必须空getter和setter块是语法正确。没有什么不对您的第二个例子 - 是的，这是一个有点冗长，但很显然，简洁，能够完成任务。

Unfortunately there is no way to shorten what you have, automatically implemented properties (i.e. public String FeedbackComment { get; set; }) must have empty getter and setter blocks to be syntactically correct. There is nothing wrong with your second example - yes, it is a bit verbose but it is clear, concise, and gets the job done.

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