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

You can use the extension method below:

public static string GetStringBetween(this string token, string first, string second)
    {            
        if (!token.Contains(first)) return "";

        var afterFirst = token.Split(new[] { first }, StringSplitOptions.None)[1];

        if (!afterFirst.Contains(second)) return "";

        var result = afterFirst.Split(new[] { second }, StringSplitOptions.None)[0];

        return result;
    }

Usage is:

var token = "super exemple of string key : text I want to keep - end of my string";
var keyValue = token.GetStringBetween("key : ", " - ");

Answer 2

Regex is overkill here.

You could use string.Split with the overload that takes a string[] for the delimiters but that would also be overkill.

Look at Substring and IndexOf - the former to get parts of a string given and index and a length and the second for finding indexed of inner strings/characters.

Answer 3

 string str="super exemple of string key : text I want to keep - end of my string";
        int startIndex = str.IndexOf("key") + "key".Length;
        int endIndex = str.IndexOf("-");
        string newString = str.Substring(startIndex, endIndex - startIndex);

Answer 4

If you are looking for a 1 line solution, this is it:

s.Substring(s.IndexOf("eT") + "eT".Length).Split("97".ToCharArray()).First()

The whole 1 line solution, with System.Linq:

using System;
using System.Linq;

class OneLiner
{
    static void Main()
    {
        string s = "TextHereTisImortant973End"; //Between "eT" and "97"
        Console.WriteLine(s.Substring(s.IndexOf("eT") + "eT".Length)
                           .Split("97".ToCharArray()).First());
    }
}

Answer 5

I think this works:

   static void Main(string[] args)
    {
        String text = "One=1,Two=2,ThreeFour=34";

        Console.WriteLine(betweenStrings(text, "One=", ",")); // 1
        Console.WriteLine(betweenStrings(text, "Two=", ",")); // 2
        Console.WriteLine(betweenStrings(text, "ThreeFour=", "")); // 34

        Console.ReadKey();

    }

    public static String betweenStrings(String text, String start, String end)
    {
        int p1 = text.IndexOf(start) + start.Length;
        int p2 = text.IndexOf(end, p1);

        if (end == "") return (text.Substring(p1));
        else return text.Substring(p1, p2 - p1);                      
    }

Answer 6

var matches = Regex.Matches(input, @"(?<=key :)(.+?)(?=-)");

This returns only the value(s) between "key :" and the following occurance of "-"