Starting a process in the current command window in .NET

Question

I have this in a VB.NET console application:

Dim p As ProcessStartInfo
p = New ProcessStartInfo(Environment.CurrentDirectory & "\bin\javac.exe",ClassName & ".java")
Dim ps As Process = Process.Start(p)

This does run the java compiler on the file, but it does so in a new window. I want the output from javac to appear in the same console that is running my application. How can I do this? Perhaps there is another method for running commands in the current console? Or maybe I can supress the second console window from opening and redirect its output to the current console?

Answer 1

I don't think that you can run in same console, because it is occupied by your application. If it is just about showing output you can use stream redirection. If you do javac [here go params] >out.txt 2>err.txt you can later load outputs from them when javac finished.

You can even redirect streams to your application by ProcessStartInfo.RedirectStandardOutput and Process.StandardOutput

Answer 2

I don't think you can run in the same console but you can get the output by redirecting the standard out:

Dim si = New ProcessStartInfo(Environment.CurrentDirectory & "\bin\javac.exe",ClassName & ".java")

si.RedirectStandardOutput = True
si.UseShellExecute = False
Dim proc = New Process() 
proc.StartInfo = si
proc.Start()
proc.StandardOutput.ReadToEnd()
proc.WaitForExit()