select text between two numbers from text file using regex u

Question

file name : example.txt
inside text file
33.0.123
loading "apple\folder1\folder2"
loading "bat\folder3\folder4"
unloaded "cat\fold5\fold6"

33.0.122
loading "apple\folder1\folder2"
loading "bat\folder3\folder4"
unloaded "cat\fold5\fold6"

33.0.121
loading "apple\folder1\folder2"
loading "bat\folder3\folder4"
unloaded "cat\fold5\fold6"

i have to select text only from 33.0.123 to 33.0.122 and i want to select only loading part ,discard unloaded part using regex

Vulpes · Answer

Try the following: using System; using System.Text.RegularExpressions; using System.IO; class Program { static void Main() { string text = File.ReadAllText(example.txt); string regExp = @(?s)33\.0\.123.*?loading (.+?).*?loading (.+?).*?33\.0\.122; Match m = Regex.Match(text regExp); Console.WriteLine(m.Groups[1].Value); Console.WriteLine(m.Groups[2].Value); Console.ReadKey(); } } The output should be: apple\folder1\folder2 bat\folder3\folder4

Vulpes · Answer

If you don't want to hard-code the start (and end) points for the search then this should work: using System; using System.Text.RegularExpressions; using System.IO; class Program { static void Main() { string text = File.ReadAllText(example.txt); string start = @33\.0\.123; // or whatever string finish = @33\.0\.121; // or whatever string regExp1 = @(? string regExp2 = @loading (.+?); string regExp3 = (?=.* + finish + ); string regExp = @(?s) + regExp1 + regExp2 + regExp3; MatchCollection mc = Regex.Matches(text regExp); foreach(Match m in mc) { Console.WriteLine(m.Groups[1].Value); } Console.ReadKey(); } } As expected the output this time is: apple\folder1\folder2 bat\folder3\folder4 apple\folder1\folder2 bat\folder3\folder4

suhas setty · Answer

instead of hardcoding 33.0.123 i want to put string name In string output the value 33.0.123 will be stored. i want to use output instead of 33.0.123 and it should check n no of loadings until unloaded is found