read txt file into a tuple

Question

1.00/5 (3 votes)

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Hi,
How can I loop through a file containg values like the ones below, and stored them in a Tuple ?

1.1, 0.1836856, 5.6
3.3, -5.5, 43.44
-0.38162, 6.636666E-08, 3.1
1.01516E-07, 0.3695395, 1.5

thank you

C#

var reader = new StreamReader(File.OpenRead(@"C:\MyFile.txt"));

while (!reader.EndOfStream)
{
    var line = reader.ReadLine();
    var values = line.Split(',');
    
    var val1 = decimal.Parse(values[0], System.Globalization.NumberStyles.Float);
    var val2 = decimal.Parse(values[1], System.Globalization.NumberStyles.Float);
    var val3 = values[2];
    
    Tuple myTuple = Tuple.Create(val1,val2, val3);
}

Posted 17-Oct-15 6:10am

walidm38

Updated 18-Oct-15 0:18am

Maciej Los

v3

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Comments

[no name] 17-Oct-15 12:20pm

Splite a line with "," as separatore should do it...

PIEBALDconsult 17-Oct-15 12:21pm

Why didn't you simply add that to your existing question?
http://www.codeproject.com/Lounge.aspx?fid=1159&select=5143830#xx5143830xx

Kenneth Haugland 17-Oct-15 13:27pm

You can use this:
https://msdn.microsoft.com/en-us/library/microsoft.visualbasic.fileio.textfieldparser(v=vs.110).aspx

walidm38 17-Oct-15 14:50pm

If my txt file contained simlar rows to these:
1.1, 0.1836856, 5.6
3.3, -5.5, 43.44
-0.38162, 6.636666E-08, 3.1
1.01516E-07, 0.3695395, 1.5

How can read the file into a Tuple ?
Thank you

Hide Copy Code
var reader = new StreamReader(File.OpenRead(@"C:\MyFile.txt"));

while (!reader.EndOfStream)
{
var line = reader.ReadLine();
var values = line.Split(',');

var val1 = decimal.Parse(values[0], System.Globalization.NumberStyles.Float);
var val2 = decimal.Parse(values[1], System.Globalization.NumberStyles.Float);
var val3 = values[2];

Tuple<decimal,> myTuple = Tuple.Create<decimal,decimal,string>(val1,val2, val3);

}

Tomas Takac 18-Oct-15 2:47am

You shouldn't post code in comments, update your question instead.

Tomas Takac 18-Oct-15 2:51am

Good start, you need to:
1) create tuples in form [line (string), column2 (double/decimal)]
2) then store these in a list
3) sort the list according column2 value
4) write line value to output file

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Maciej Los · Answer 1 · 2015-10-18T00:38:00

Check this:

C#

string sFile  = @"D:\MyFile.txt";

string[] lines = File.ReadAllLines(sFile);
System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("en-US");

var result = lines.Select
    (
        a=> Tuple.Create(
            double.Parse(a.Split(new string[]{","}, StringSplitOptions.RemoveEmptyEntries)[0], culture),
            double.Parse(a.Split(new string[]{","}, StringSplitOptions.RemoveEmptyEntries)[1], culture)
            double.Parse(a.Split(new string[]{","}, StringSplitOptions.RemoveEmptyEntries)[2], culture)
        )
    )
    .ToList();

Returns List<Tuple<double,double,double>>