Get parameters from text file c#

Question

I have a text file that is formatted like so...

[Dimensions]
Height=100
Width=200
Depth=1000

I am trying to write a method that takes the parameter name such as "Height" with the text and returns the value of the parameter but it is currently not working

public int getParameter(data, param) {
        var start = data.IndexOf(param);
        var end = data.IndexOf('\r\n', start);
        return data.Substring(start + param.length + 1, end);
    }

But it always returns partial text on the next line such as

"100\r\nWid"

https://msdn.microsoft.com/en-us/library/dd383503%28v=vs.110%29.aspx — Deblaton Jean-Philippe, Feb 12 '15 at 09:57
Read file line by line. Create collection where keep key as Hight, width, depth and values as values. And search in this preapared collection. — Amit, Feb 12 '15 at 10:07
http://stackoverflow.com/questions/217902/reading-writing-an-ini-file — Mike Nakis, Feb 12 '15 at 10:12

James S · Accepted Answer · 2015-02-12T10:32:58.697

I'd probably use a regular expression for that:

public int getParameter(string data, string param) {
        var expr = "^" + param + @"=(\d+)\r?$";
        var match = Regex.Match(data, expr, 
                                  RegexOptions.Multiline | RegexOptions.IgnoreCase);
         // NB - can remove the option to IgnoreCase if desired
        return match == null || !match.Success ? default(int) : int.Parse(match.Groups[1].Value);
    }

score 0 · Answer 2 · answered Feb 12 '15 at 09:57

0

You are passing wrong value to second parameter for Substring.It's the lenght, not the end index, so it should be:

var startIndex = start + param.length + 1;

return data.Substring(startIndex, end - startIndex);

answered Feb 12 '15 at 09:57

Selman Genç

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score 0 · Answer 3 · edited May 23 '17 at 11:56

0

Looks like you're trying to parse an ini file, for which there are already some options avaiable.

edited May 23 '17 at 11:56

Community

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answered Feb 12 '15 at 09:58

Carra

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score 0 · Answer 4 · answered Feb 12 '15 at 10:34

0

This looks pretty similar to TOML, you might want to do minor changes and use the TOML.NET Package.

I didn't test it, but used TOML in a go project and it worked quite well. Takes some effort from yourself.

answered Feb 12 '15 at 10:34

krizz

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score 0 · Answer 5 · answered Feb 12 '15 at 15:53

That file follows the ini format, so I'll recommend using ini-parser for reading it: https://github.com/rickyah/ini-parser

Is as simple as:

   var parser = new FileIniDataParser();
   IniData parsedData = parser.LoadFile("config.ini");
   int height = Int32.parse(parsedData["Height"])

Disclaimer, I'm the author of the library

Get parameters from text file c#

5 Answers5