In C#, I am trying to run a command line program that gets input from stdin and then it returns the output to stdout . I need to keep cmd.exe running (using /k) and in a for loop, send in text and then wait for the output before sending the next text. This works if I don't redirect stdout but not after I redirect it. Initially I got data back from stdout (although much later) and now that is no longer working other than the initial call to start the program. This link says "Alternately, you can avoid the deadlock condition by creating two threads and reading the output of each stream on a separate thread." Would that fix my issue and if so, how would I do that?
The code is set up as follows:
StringBuilde sb = new StringBuilder();
Process process = new Process();
process.StartInfo.RedirectStandardError = true;
process.StartInfo.WorkingDirectory = workingdirectory;
process.StartInfo.UseShellExecute = false;
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.Arguments = "/k";
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardInput = true;
process.EnableRaisingEvents = true;
process.OutputDataReceived += (sender, args) => AppendData(args.Data); //this appends the output to a stringbuilder
process.ErrorDataReceived += (sender, args) => AppendError(args.Data);
process.Start();
//sw is a streamwriter
sw= process.StandardInput;
//now call the command line code
sw.WriteLine(" some.exe some.arg ");
process.BeginOutputReadLine();
foreach(DataRow row in dtMydata.Rows)
{
mytext=row["Text"].toString();
sw.WriteLine(mytext);
sw.WriteLine(Environment.NewLine); //This redirects the text to the program,
}
