Read config file and create a log file

Question

I have a config file called one_two.config.txt containing the path of a log file to be written.

I want to read this line ( 'comdir=C:\Users\One\Desktop' ) and then create a new log file in a given directory. The log file is going to have some data ( Time / Date / ID etc. )

Here is what i have right now :

                   string VarSomeData = ""; // Contains Data that should be written in log.txt

                    for (Int32 i = 0; i < VarDataCount; i++)
                    {                            

                        csp2.DataPacket aPacket;


                        VarData = csp2.GetPacket(out aPacket, i, nComPort);


                        VarSomeData = String.Format("\"{0:ddMMyyyy}\",\"{0:HHmmss}\",\"{1}\",\"{2}\",\"{3}\" \r\n", aPacket.dtTimestamp, VarPersNr, aPacket.strBarData, VarId.TrimStart('0'));


                        string line = "";
                        using (StreamReader sr = new StreamReader("one_two.config.txt"))
                        using (StreamWriter sw = new StreamWriter("log.txt"))
                        {
                            while ((line = sr.ReadLine()) != null)
                            {
                               if((line.StartsWith("comdir="))
                               {
                                 // This is wrong , how should i write it ?
                                 sw.WriteLine(VarSomeData); 
                               }
                            }
                        }
                    }

Right now the log file is being created in same directory as the config file.

Answer 1

This should get you started:

string line;
using (StreamReader file = new StreamReader("one_two.config.txt"))
using (StreamWriter newfile = new StreamWriter("log.txt"))
{
    while ((line = file.ReadLine()) != null)
    {
        newfile.WriteLine(line);
    }
}