添加到内部List< string>在新的实例中. [英] Adding to internal List<string> in a new instance.

问题描述

想创建一个List< string>来保存错误消息，但是可以在控制台应用程序的不同类中添加到此消息中.我有一个调用实用程序类的业务层，该实用程序类中引发的错误需要添加 进入错误列表.

Would like to create a List<string> to hold error messages but have the ability to add to this in different classes in my Console application.  I have a business layer that calls a utility class, errors raised in the utility class need to be added to the errors list. 

这可能吗，还有更好的方法吗?

Is this possible and also is there a better way? 

这是一个平凡的例子，展示了我想要达到的目标.

This is a trivialised example to show what I want to acheive. 

谢谢

推荐答案

你好您可以通过使Utils类或错误变为静态来实现此目的.  单例模式是实现此目的的常用方法:

You can achieve this by making the Utils class or the errors static.  The singleton pattern is a common way to achieve this:

using System;

public class Utils
{
   private static Utils instance;

   private Utils() {}

   public static Utils Instance
   {
      get 
      {
         if (instance == null)
         {
            instance = new Utils();
         }
         return instance;
      }
   }

   private List<string> _errors = new List<string>();
   public void AddError(string error)
   {
      // TODO: add a lock in case this is multithreaded
      _errors.Add(error);
   }
}

希望这会有所帮助！

Hope this helps!

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