Question

How to hide cmd window while running a batch file?

I use the following code to run batch file

process = new Process();
process.StartInfo.FileName = batchFilePath;
process.Start();

Answer 1

If proc.StartInfo.UseShellExecute is false, then you are launching the process and can use:

proc.StartInfo.CreateNoWindow = true;

If proc.StartInfo.UseShellExecute is true, then the OS is launching the process and you have to provide a “hint” to the process via:

proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

However the called application may ignore this latter request.

If using UseShellExecute = false, you might want to consider redirecting standard output/error, to capture any logging produced:

proc.StartInfo.UseShellExecute = false;
proc.StartInfo.RedirectStandardOutput = true;
proc.OutputDataReceived += new DataReceivedEventHandler(ProcessOutputHandler);
proc.StartInfo.RedirectStandardError = true;
proc.ErrorDataReceived += new DataReceivedEventHandler(ProcessOutputHandler);

And have a function like

private void ProcessOutputHandler(object sendingProcess, DataReceivedEventArgs outLine)
{
   if (!String.IsNullOrEmpty(outLine.Data)) // use the output outLine.Data somehow;
}

There’s a good page covering CreateNoWindow this on an MSDN blog.

There is also a bug in Windows which may throw a dialog and defeat CreateNoWindow if you are passing a username/password. For details

http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=98476
http://support.microsoft.com/?kbid=818858