CODEWITHSUNDEEP
c#escaping
Jack
Jack

Reputation: 23

how to convert char @"\" to Escape String \ by C#

I have grabbed some data from a website.A string which is named as urlresult in the data is "http:\/\/www.cnopyright.com.cn\/index.php?com=com_noticeQuery&method=wareList&optionid=1221&obligee=\u5317\u4eac\u6c83\u534e\u521b\u65b0\u79d1\u6280\u6709\u9650\u516c\u53f8&softwareType=1".

what I want to do is to get rid of the first three char @'\' in the string urlresult above . I have tried the function below:

public string ConvertDataToUrl(string urlresult )
{

   var url= urlresult.Split('?')[0].Replace(@"\", "") + "?" + urlresult .Split('?')[1];


  return url

}

It returns "http://www.cnopyright.com.cn/index.php?com=com_noticeQuery&method=wareList&optionid=1221&obligee=\\u5317\\u4eac\\u6c83\\u534e\\u521b\\u65b0\\u79d1\\u6280\\u6709\\u9650\\u516c\\u53f8&softwareType=1" which is incorrect.

The correct result is "http://www.cnopyright.com.cn/index.php?com=com_noticeQuery&method=wareList&optionid=1221&obligee=北京沃华创新科技有限公司&softwareType=1"

I have tried many ways,but it hasn't worked.I have no idea how to get the correct result.

Upvotes: 1

Views: 4947

Answers (2)

BlueMonkMN
BlueMonkMN

Reputation: 25601

I think you may be misled by the debugger because there's no reason that extra "\" characters should get inserted by the code you provided. Often times the debugger will show extra "\" in a quoted string so that you can tell which "\" characters are really there versus which are there to represent other special characters. I would suggest writing the string out with Debug.WriteLine or putting it in a log file. I don't think the information you provided in the question is correct.

As proof of this, I compiled and ran this code:

static void Main(string[] args)
{
   var url = @"http:\/\/www.cnopyright.com.cn\/index.php?com=com_noticeQuery&method=wareList&optionid=1221&obligee=\u5317\u4eac\u6c83\u534e\u521b\u65b0\u79d1\u6280\u6709\u9650\u516c\u53f8&softwareType=1";
   Console.WriteLine("{0}{1}{2}", url, Environment.NewLine, 
      url.Split('?')[0].Replace(@"\", "") + "?" + url.Split('?')[1]);
}

The output is:

http:\/\/www.cnopyright.com.cn\/index.php?com=com_noticeQuery&method=wareList&optionid=1221&obligee=\u5317\u4eac\u6c83\u534e\u521b\u65b0\u79d1\u6280\u6709\u9650\u516c\u53f8&softwareType=1
http://www.cnopyright.com.cn/index.php?com=com_noticeQuery&method=wareList&optionid=1221&obligee=\u5317\u4eac\u6c83\u534e\u521b\u65b0\u79d1\u6280\u6709\u9650\u516c\u53f8&softwareType=1

Upvotes: 3

Kvam
Kvam

Reputation: 2218

You can use the System.Text.RegularExpressions.Regex.Unescape method:

var input = @"\u5317\u4eac\u6c83\u534e\u521b\u65b0\u79d1\u6280\u6709\u9650\u516c\u53f8";
string escapedText = System.Text.RegularExpressions.Regex.Unescape(input);

Upvotes: 1

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