run exe in console

Juha

15y1.6k

I have an exe that works in command prompt and needs two parameters feeded and enter pushed (to get some calculation results). However I need this to be worked directly from my vb.net application, so that those two parameters are feeded automatically and the results read into vb.

I can make the external exe run with Shell-command and i can feed commands to cmd with SendKeys class so that the external exe makes its calculation properly. But the calculation results appear in the cmd prompt window and I can't make my software read them. Is there any simple solution to this?

2 Replies

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Juha15y ago
Thanks for the reply, you were on the right track. I already found a solution to this:

Dim proc As New Process()
Dim result As String = ""
Dim argString as String = "Whatever"
Dim feed1 as String = "1st feed value"
Dim feed2 as String = "2nd feed value"

proc.StartInfo.FileName = "myexe.exe"
proc.StartInfo.Arguments = argString
proc.StartInfo.CreateNoWindow = True
proc.StartInfo.RedirectStandardInput = True
proc.StartInfo.RedirectStandardOutput = True
proc.StartInfo.UseShellExecute = False
proc.Start()
proc.StandardInput.WriteLine(feed1 & " " & feed2)
proc.StandardInput.Close()

result = proc.StandardOutput.ReadToEnd

I just replaced arguments and those feeded values with proper values. Works perfectly. :)
Vulpes15y ago
I'd have thought that something like this should work:

Dim arg1 As String = "Whatever1"
Dim arg2 As String = "Whatever2"
Dim proc As New System.Diagnostics.Process()
proc.StartInfo.FileName = "myexe.exe"
proc.StartInfo.Arguments = arg1 & " " & arg2
proc.StartInfo.UseShellExecute = False
proc.StartInfo.RedirectStandardOutput = True
proc.Start()
Dim result As String = proc.StandardOutput.ReadToEnd())
proc.WaitForExit()