Help me parse a text file and extract specific values?

I would recommend using a regular expression for this, something like: open System.Text. RegularExpressions let usernameRegex = new Regex(". *owned by\s+(?.

*)\s+was. *") /// Trys to extract the username from a given line of text. Returns None if the line is malformed // Note: You could also use failwith in the else branch or throw an exception or ... let extractUsername line = let regexMatch = usernameRegex.

Match(line) in if regexMatch. Success then Some regexMatch.Groups. "username".

Value else None // In reality you would like to load this from file using File. ReadAllLines let sampleLines = "Some text some text owned by DESIRED USERNAME was some text some text"; "Some text line not containing the pattern"; "Another line owned by ANOTHER USER was" let extractUsernames lines = lines |> Seq. Map extractUsername |> Seq.

Filter (fun usernameOption -> usernameOption. IsSome) |> Seq. Map (fun usernameOption -> usernameOption.

Value) // You can now save the usernames to a file using // File. WriteAllLines("FileName", extractUsernames(sampleLines)).

Thanx for the awnser . Its part of the solution but I think I can manage to sort de usernames and get the printed pages per user (i think) Regards – Coolzero1974 Jul 4 at 7:50.

You can do something like: let getBetween (a:string) (b:string) (str:string) = str. Split(a.ToCharArray()).1. Split(b.ToCharArray()).0.Trim() let total (a:string seq) = (a |> Seq.

Map Int32. Parse |> Seq. Reduce (+)).ToString() File.

ReadAllLines("inFile") |> Seq. Map (fun l -> (getBetween "owned by" "was" l , getBetween "Pages printed:" ". " l) ) |> Seq.

GroupBy (fun (user,count) -> user) |> Seq. Map (fun (user,counts) -> user + "\t" + (counts |> Seq. Map snd |> total) ) |> (fun s -> File.

WriteAllLines("outFile",s) ).

– Coolzero1974 Jun 16 at 19:29 I have updated my answer, please try that. This will put the user and count in each line and user and count is separated by tab – Ankur Jun 17 at 4:33 thx for tthe code but I got a lot of error System. Formatexeption: inputstring was not in the correct format – Coolzero1974 Jun 17 at 10:12 Seems that parseInt is not working because the string between pages printed\\: and .

Is not an integer – Ankur Jun 17 at 10:30 between those words it's always a number . Like pages printed: 6.No user action is required. It's standard message from log event 10 – Coolzero1974 Jun 17 at 11:38.

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