在C＃中：添加引号字符串中的一个逗号分隔的字符串列表 [英] In C#: Add Quotes around string in a comma delimited list of strings

问题描述

这可能有一个简单的答案，但我不能有足够的咖啡弄明白我自己的：

如果我有一个逗号分隔的字符串，如

 字符串列表=弗雷德，山姆，迈克，莎拉 
  

该如何获得每个元素和它周围添加引号，并坚持它放回在这样的字符串：

 字符串newList ='弗雷德'，'萨姆'，'迈克'，'莎拉'; 
  

我假设在每一个迭代是一个开始，但我得到了后难住了。

一个解决方案，它是丑陋的：

  INT数= 0; 
串newList =; 
的foreach（在list.Split（字符串项新的char [] {'，'}））
 {
如果（数大于0）
 {
 newList = newList +，+'+项目+'; 
} 
，否则
 {
 newList ='+项目+'; 
} 
号++; 
} 
  

解决方案

 字符串s =A，B，C; 
字符串替换='+ s.Replace（，，，）+'; 
  

感谢您的意见，我已经错过了外部报价。

当然..如果来源是一个空字符串，你会希望它周围多余的引号或不？而如果输入的是一堆空格...的？我的意思是，给予100％的完整的解决方案，我可能会问的单元测试列表，但我希望我的直觉回答了你的核心问题。

的更新的：基于LINQ的替代也被建议（使用的String.Format，因此没有额外的好处不用担心前/后引号）：

 字符串列表=弗雷德，山姆，迈克，莎拉 
串newList =的string.join（，，list.Split（，）选择（X =方式>。的String.Format（{0}，x）的）了ToList（）） ; 
  

This probably has a simple answer, but I must not have had enough coffee to figure it out on my own:

If I had a comma delimited string such as:

string list = "Fred,Sam,Mike,Sarah";

How would get each element and add quotes around it and stick it back in a string like this:

string newList = "'Fred','Sam','Mike','Sarah'";

I'm assuming iterating over each one would be a start, but I got stumped after that.

One solution that is ugly:

int number = 0;
string newList = "";
foreach (string item in list.Split(new char[] {','}))
{
    if (number > 0)
    {
        newList = newList + "," + "'" + item + "'";
    }
    else
    {
        newList = "'" + item + "'";
    }
    number++;
}

解决方案

string s = "A,B,C";
string replaced = "'"+s.Replace(",", "','")+"'";

Thanks for the comments, I had missed the external quotes.

Of course.. if the source was an empty string, would you want the extra quotes around it or not ? And what if the input was a bunch of whitespaces... ? I mean, to give a 100% complete solution I'd probably ask for a list of unit tests but I hope my gut instinct answered your core question.

Update: A LINQ-based alternative has also been suggested (with the added benefit of using String.Format and therefore not having to worry about leading/trailing quotes):

string list = "Fred,Sam,Mike,Sarah";
string newList = string.Join(",", list.Split(',').Select(x => string.Format("'{0}'", x)).ToList());

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