Calling R.exe from command prompt using C# not working
Hi
I am facing problem to execute R package via Command prompt using C#.
Following are code snippet:
///Starting Information for process like its path, use system shell i.e. control process by system etc.
ProcessStartInfo psi = new ProcessStartInfo(@"C:\WINDOWS\system32\cmd.exe");
// its states that system shell will not be used to control the process instead program will handle the process
psi.UseShellExecute = false;
psi.ErrorDialog = false;
// Do not show command prompt window separately
psi.CreateNoWindow = true;
psi.WindowStyle = ProcessWindowStyle.Hidden;
//redirect all standard inout to program
psi.RedirectStandardError = true;
psi.RedirectStandardInput = true;
psi.RedirectStandardOutput = true;
//create the process with above infor and start it
Process plinkProcess = new Process();
plinkProcess.StartInfo = psi;
plinkProcess.Start();
//link the streams to standard inout of process
StreamWriter inputWriter = plinkProcess.StandardInput;
StreamReader outputReader = plinkProcess.StandardOutput;
StreamReader errorReader = plinkProcess.StandardError;
//send command to cmd prompt and wait for command to execute with thread sleep
inputWriter.WriteLine("C:"); ---->this command executes
inputWriter.WriteLine("cd\\");---->this command executes
inputWriter.WriteLine(@"cd C:\Program Files\R\R-3.0.1\bin\i386");---->this command executes
inputWriter.WriteLine(@"R.exe"); ---->this command is not working
inputWriter.WriteLine(@"2+2"); ---->this command is not working
inputWriter.WriteLine(@"mydata <- read.csv('http://www.ats.ucla.edu/stat/data/binary.csv')");---->this command is not working
inputWriter.WriteLine(@"head(mydata)");---->this command is not working
Thread.Sleep(2000);
// flush the input stream before sending exit command to end process for any unwanted characters
inputWriter.Flush();
inputWriter.WriteLine("exit\r\n");
// read till end the stream into string
strOutput = outputReader.ReadToEnd();
Console.WriteLine(strOutput);
Console.ReadKey();
Please help what I am doing wrong here.
Thanks,
Tariq Khan