how to convert text file into CSV file using c#

Question

I have an input file with fixed columns lengths and I need the file converted to csv using c# code. The current code transforms to csv but the entire row data is not seperated by columns in csv instead stores complete row data values in single cell in each row in converted csv file.

Input text file:-

#Configuration: Tests
#Station                All                      1st                     2nd
#             Sat1   Sat2  Sat3           Sat1  Sat2  Sat3             Sat1  Sat2  Sat3
AA         92.88    95.14    93.16    98.31    98.98   100.00    91.31    94.17    93.16
BB         94.57    95.42    93.12    98.21    98.98    99.46    92.88    94.45    92.62
CC         93.26    95.00    92.99    98.49    99.26   100.00    91.85    94.30    92.99

The values should be stored in the similar way in csv file by text values seperated bycolumns.

            string sourcefile;
            string destfile;

            sourcefile=@"C:\\Temp\\NALabc.txt";
            destfile=@"C:\\Tempp\\NAL.csv";
            
            int i, j;       
            StreamWriter csvfile;
            string[] lines, cells;
            lines = File.ReadAllLines(sourcefile);
            csvfile = new StreamWriter(destfile);
            for (i = 0; i < lines.Length; i++)
            {
                cells = lines[i].Split(new Char[] { '\t', ';' });
                for (j = 0; j < cells.Length; j++)
                    csvfile.Write(cells[j] + "\t");
                csvfile.WriteLine();
            }
            csvfile.Close();

Answer 1

I think

csvfile.Write(cells[j] + "\t");

Should instead be

csvfile.Write(cells[j] + ",");

Even with this fix you'll end up with an extra comma at the end of your line. string.Join() may work better for you.