如何在字符串中搜索斜杠字符？ [英] How can search back slash character in string?

问题描述

你好。我有以下方法。这个方法搜索在字符串实例中获取'\'的计数。但它有错误。

Hi there.I have following method.this method search for getting count of '\' in instance of string. but it has error.

/// <summary>
       /// This method returns count of specified character in a string.
       /// </summary>
       /// <param name="stringForProcessing">Determines instance of string class that contains specifiedCharacter</param>
       /// <param name="specifiedCharacter">Determines specified character for searching. </param>
       /// <returns></returns>
       private int GetCountOfOccurance(string stringForProcessing, char specifiedCharacter)
       {
           int result = 0;
           foreach (char letter in stringForProcessing)
           {
               if (letter.Equals(specifiedCharacter))
               {
                   result++;
               }
           }
           return result;
       }

这里我称之为但不允许编译：

this.GetCountOfOccurance（路径，'\'）

请帮帮我。如何搜索'\'

and here i call it but it doesn't allow for compiling:
this.GetCountOfOccurance(path,'\')
Please help me. how can search for '\'

推荐答案

你应该使用转义序列来反斜杠：

http://msdn.microsoft.com/en-us/library/h21280bw.aspx [ ^ ]

You should use the escape sequence for a backslash:
http://msdn.microsoft.com/en-us/library/h21280bw.aspx[^]

this.GetCountOfOccurance(path, '\\');

希望这会有所帮助。

Hope this helps.

两件事：

首先，你需要使用其中两个来逃避反斜杠：

Two things:
First, you need to escape the backslash by using two of them:

this.GetCountOfOccurance(path,'\\');

自反斜杠字符是C＃中的特殊字符，它引入了其他字符，如换行符：'\ n' ，引用：'\''和doublequote：'\''。



其次，有很多方法可以做到这一点：在字符串中计算行数 [ ^ ]涵盖了大量的数据！

Since the backslash character is a "special" in C# which introduces other characters such as newline: '\n', quote: '\'' and doublequote: '\"'.

Secondly, there are a huge number of ways to do this: Counting Lines in a String[^] covers a good number of them!

正确转义反斜杠字符，例如

以下行有效

The backslash character smust be properly escaped, e.g.
the following line is valid

char c = '\\'; // compiles fine

而一行以下的行不是

while the line below one is not

char c = '\'; // COMPILATION ERROR

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