C#字符串比较由于其中包含特殊字符的字符串而失败 [英] C# String comparison fails for string having special character in it

问题描述

我有一个字符串列表，其中包含一些带有特殊字符(例如-，[，]，(，)的字符串).

I have a list of string that contains few strings with some special characters like -, [, ], (, ).

我正在将字符串传递给需要解析以上列表和方法的方法.查找是否找到完全匹配的内容.

I am passing a string to a method where I need to parse the above list & find if the exact match is found or not.

为此，我编写了以下代码，但是当字符串中出现特殊字符时，就无法进行比较.

For this I have written the below code, but when ever the special characters are present in the string, its not able to compare.

foreach (var item in myList)
{
    if (myInput.Trim().ToUpper() == item.Trim().ToUpper() ) //Here myInput is "In - Com [SP]"
    {
        count++;
    }

}

但是，如果我通过前面的@符号比较静态字符串，则比较工作正常.例如:

But if I compare a static string by a preceding @ symbol, then the compare is working fine. For Example :

if (item == @"In - Com [SP]")
{
    count++;
}

有人可以帮助我如何将其合并为动态字符串列表吗?注意:我们不能将@与字符串变量连接.

Can anyone please help me how to incorporate this for a dynamic list of strings? NB : We cant concatenate @ with a string variable.

使用Regex存在任何方式吗?

Any ways exist by using Regex?

推荐答案

如果要计数，只需 Count()借助 Linq 即可；要测试字符串是否相等，请使用 String.Equals :

If you want to count, just Count() with a help of Linq; to test if strings are equal use String.Equals:

System.Linq;
...
// do not do Trim() repeatedly
String testValue = myInput.Trim();

int count = myList
  .Count(item => String.Equals(item.Trim(), 
                               testValue,
                               StringComparison.OrdinalIgnoreCase));

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