C#编程中与结构中的构造方法有关的错误吗?！！！ [英] Error related to Constructor Method in Structure in C# programming?!!!

问题描述

大家好
这是我的结构示例，我无法理解是否发生了错误！

Hi all
this is my example of Structure and i can''t understand Error happened!

struct Book
    {
        // Property
        public string Author { get; set; }
        public string Title { get; set; }
        private int copyright;
        public int Copyright
        {
            set
            {
                if (value < 2000)
                    Console.WriteLine("\n this copyright is not valid");
                else
                    this.copyright = value;
            }
            get { return this.copyright; }
        }
        // Constructors
        public Book(string a, string t, int c)
        {
            Author = a; // Error happened!
            Title = t;
            Copyright = c;
        }
    }

错误:在将控制权返回给调用者之前，必须完全分配自动实现的属性".Book.Author"的后备字段.考虑从构造函数初始值设定项调用默认构造函数.

Error: Backing field for automatically implemented property ''.Book.Author'' must be fully assigned before control is returned to the caller. Consider calling the default constructor from a constructor initializer.

推荐答案

看看该线程，它解释了问题和解决方法.

http: //stackstackflow.com/questions/1449871/what-is-happening-here-how-i-call-the-default-constructor-when-there-is-non [

Have a look at this thread, which explains the issues and a fix.

http://stackoverflow.com/questions/1449871/what-is-happening-here-how-can-i-call-the-default-constructor-when-there-is-non[^]

某种程度上，struct中的自动属性确实存在一些问题.

代替

Hi,

Somehow, automatic properties in struct do have some issue.

Instead of

public string Author { get; set; }

使用以下

use following

private int _Author ; 
public int Author 
{         
get { return _Author ; }         
set { _Author = value; }     
} 

请参阅 http://social.msdn.microsoft.com/Forums /en/vcsharpexpress2008prerelease/thread/31904232-e43b-455d-bd6a-c04c92c334ce [

See http://social.msdn.microsoft.com/Forums/en/vcsharpexpress2008prerelease/thread/31904232-e43b-455d-bd6a-c04c92c334ce[^] for more details.

Hope that helps, If it does, mark the answer as solution/upvote.

Thanks
Milind

问题是您的copyright字段:

The problem is your copyright field:

public Book(string a, string t, int c)
    {
    copyright = c;
    Author = a;
    Title = t;
    Copyright = c;
    }

将对其进行修复！

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