Get string between two strings in a string

Question

I have a string like:

\"super exemple of string key : text I want to keep - end of my string\"

I want to just keep the string which is betw

Answer 1

I used the code snippet from Vijay Singh Rana which basically does the job. But it causes problems if the firstString does already contain the lastString. What I wanted was extracting a access_token from a JSON Response (no JSON Parser loaded). My firstString was \"access_token\": \" and my lastString was \". I ended up with a little modification

string Between(string str, string firstString, string lastString)
{    
    int pos1 = str.IndexOf(firstString) + firstString.Length;
    int pos2 = str.Substring(pos1).IndexOf(lastString);
    return str.Substring(pos1, pos2);
}

Answer 2

Something like this perhaps

private static string Between(string text, string from, string to)
{
    return text[(text.IndexOf(from)+from.Length)..text.IndexOf(to, text.IndexOf(from))];
}

Answer 3

Here is the way how i can do that

   public string Between(string STR , string FirstString, string LastString)
    {       
        string FinalString;     
        int Pos1 = STR.IndexOf(FirstString) + FirstString.Length;
        int Pos2 = STR.IndexOf(LastString);
        FinalString = STR.Substring(Pos1, Pos2 - Pos1);
        return FinalString;
    }

Answer 4

In C# 8.0 and above, you can use the range operator .. as in

var s = "header-THE_TARGET_STRING.7z";
var from = s.IndexOf("-") + "-".Length;
var to = s.IndexOf(".7z");
var versionString = s[from..to];  // THE_TARGET_STRING

See documentation for details.

Answer 5

You can do it without regex

 input.Split(new string[] {"key :"},StringSplitOptions.None)[1]
      .Split('-')[0]
      .Trim();

Answer 6

Perhaps, a good way is just to cut out a substring:

String St = "super exemple of string key : text I want to keep - end of my string";

int pFrom = St.IndexOf("key : ") + "key : ".Length;
int pTo = St.LastIndexOf(" - ");

String result = St.Substring(pFrom, pTo - pFrom);