Question

我有一些代码，它应该用空字符替换Windows换行符（\r\n）。

但是，它似乎没有替换任何东西，就好像我在应用正则表达式后查看字符串一样，换行符仍然存在。

    private void SetLocationsAddressOrGPSLocation(Location location, string locationString)
    {
        //Regex check for the characters a-z|A-Z.
        //Remove any \r\n characters (Windows Newline characters)
        locationString = Regex.Replace(locationString, @"[\\r\\n]", "");
        int test = Regex.Matches(locationString, @"[\\r\\n]").Count;    //Curiously, this outputs 0
        int characterCount = Regex.Matches(locationString,@"[a-zA-Z]").Count;
        //If there were characters, set the location's address to the locationString
        if (characterCount > 0)
        {
            location.address = locationString;
        }
        //Otherwise, set the location's coordinates to the locationString. 
        else
        {
            location.coordinates = locationString;
        }
    }   //End void SetLocationsAddressOrGPSLocation()

Answer 1

您使用的是逐字字符串文字，因此\\被视为文字\。因此，您的正则表达式实际上与\，r和n匹配。使用

locationString = Regex.Replace(locationString, @"[\r\n]+", "");

此[\r\n]+模式将确保您删除每个\r和\n符号，如果您的新行字符混合使用，则无需担心文件。（有时，我在文本文件中有\n和\r\n个结尾。）

正则表达式替换Windows换行符

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