visual studio Version 17.10 add auto backsplash

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visual studio Version 17.10 add auto backsplash

Haviv Elbsz 2,091

Hello All. In my app I have a regex pattern that I accept from the user as a string. if the user enter this string pattern " " " and I check in the debugger I see that visual studio replace it to " \" ". Please how I can fix that.

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Viorel 122.6K

To view the real string, go to Watch or Immediate windows, and enter this expression: s,nq, where s is your string variable.

Haviv Elbsz 2,091 Reputation points

2024-04-27T19:14:27.89+00:00
Hello Viorel and thank you.

To be more clear.

I as a user enter "a"b" as a string pattern in field input.

I as a programmer have this code.

When I run in debug mode and step to GetPattern method that read

the user string pattern and then I hover the cursor on the pattern variable

I see "a"b" as in image 1 instead "a"b" as in image 2

private async void MatchButton_Clicked(object sender, EventArgs e) { GetPattern(); try { Regex.Match("", pattern); } catch { // }
Viorel 122.6K Reputation points

2024-04-27T19:21:12.94+00:00

In Visual Studio, Image 1 displays the value according to C# language rules. Image 2 shows the real content without special characters.
Haviv Elbsz 2,091 Reputation points

2024-04-27T19:22:24.9766667+00:00

Image 1 when cursor hover on pattern variable
Haviv Elbsz 2,091 Reputation points

2024-04-27T19:24:33.0466667+00:00

Image 2 when click the above view and select text visualize
Haviv Elbsz 2,091 Reputation points

2024-04-27T19:33:08.8+00:00

Sory the site remove the \" from "a\"b".

the images show what I see in VS. and also as the code validate the

pattern "a"b" to true witch is not true in regex. Please any hint Thank you

"In Visual Studio, Image 1 displays the value according to C# language rules. Image 2 shows the real content without special characters" <== YES

======= The user enter " " " and the pattern variable contain " \"" this why the regex validation is correct. why the input " become \" ???

Haviv Elbsz 2,091

This is the full code Please what is wrong.

  string? pattern = "";

  private string re_str = @"^\s*""(.*)""\s*.*$";

  //pattern_string is user string input

  private bool GetPattern(String pattern_string)

  {

    StringWriter swArrayToString = new StringWriter();

    string cleanPattern;

    int i;



    pattern = "";

        

    pattern_correct = true;

    string gstr = Regex.Match(pattern_string), re_str).Groups[1].Value;

   

    if(gstr != "") 

    {

     cleanPattern = Regex.Replace(RERichTextBoxLines[i], re_str, gstr);

     swArrayToString.Write(cleanPattern);

    }

    pattern = swArrayToString.ToString();

    if(String.IsNullOrEmpty(pattern))

    {

      return (false);

    }

    swArrayToString.Close();

    return (true);

  }

  private async void MatchButton_Clicked(object sender, EventArgs e)

  {

    GetPattern(user_string_input);

    try

    {

      Regex.Match("", pattern);

    }

    catch

    {

      // pattern not valid

    }

  }

Anna Xiu-MSFT 31,056 Reputation points Microsoft External Staff

2024-04-29T03:20:50.48+00:00

Hello, I will close it as a duplicate ticket:

https://learn.microsoft.com/en-us/answers/questions/1661001/c-regex-pattern-double-quotes-problem

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visual studio Version 17.10 add auto backsplash

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