Capturing std out from a process

[iforsyth]

Hi.

Running an app with System.Diagnostics.Process process with:

Sample code:

myproc = New System.Diagnostics.Process()
strPgm = "myapp.exe"
strArgs = ""
myproc.StartInfo = New
System.Diagnostics.ProcessStartInfo(strPgm, strArgs)
myproc.Start()
myproc.WaitForExit()
myproc.Close()


At points in the application, I write standard out to a file, i.e.:

Dim objLogFS As FileStream = New
FileStream(System.AppDomain.CurrentDomain.BaseDirectory() & "/Log/" &
Format(Now(), "yyyyMMddhhmmss") & ".txt", FileMode.Create)
Dim objLogStreamWriter As StreamWriter = New
StreamWriter(objLogFS)
Console.SetOut(objLogStreamWriter)
Console.WriteLine(vbCrLf & "***Application Ended At " & Now())

But this only captures output within the main application, not the
standard output that's being generated by the process. How do I get
the output from myproc and write it to a file?

Ian

 

[Herfried K. Wagner [MVP]]

* (e-mail address removed) (iforsyth) scripsit:

Running an app with System.Diagnostics.Process process with: [...]
But this only captures output within the main application, not the
standard output that's being generated by the process. How do I get
the output from myproc and write it to a file?

Does this sample work?

<http://www.mvps.org/dotnet/dotnet/samples/miscsamples/downloads/RedirectConsole.zip>

 

[Peter Huang]

Hi Lan,

Thanks for posting in the community. My name is Peter, and I will be
assisting you on this issue.

First of all, I would like to confirm my understanding of your issue.
From your description, I understand that you wants to capture the spawned
process's standard output.
Have I fully understood you? If there is anything I misunderstood, please
feel free to let me know.

Here I write a sample for you, you may have a try and let me know the
result.
Imports System.Diagnostics
imports System.IO
Module Module1
Sub Main()
Dim myproc As Process
myproc = New System.Diagnostics.Process
Dim strPgm As String = "myapp.exe"
Dim strArgs As String = ""
myproc.StartInfo.FileName = strPgm
myproc.StartInfo.Arguments = strArgs
myproc.StartInfo.UseShellExecute = False
myproc.StartInfo.RedirectStandardOutput = True
myproc.StartInfo.RedirectStandardError = True
myproc.StartInfo.CreateNoWindow = True
myproc.Start()
Dim output As String = myproc.StandardOutput.ReadToEnd()
Dim objLogStreamWriter As StreamWriter = New
StreamWriter("c:\test.txt")
objLogStreamWriter.Write(output)
objLogStreamWriter.Close()
myproc.WaitForExit()
myproc.Close()
Console.WriteLine(output)
End Sub
End Module

Launching a process and displaying its standard output
http://www.codeproject.com/csharp/LaunchProcess.asp

If you have any concern on this issue, please post here.

Best regards,

Peter Huang
Microsoft Online Partner Support

Get Secure! - www.microsoft.com/security
This posting is provided "AS IS" with no warranties, and confers no rights.

 

[Peter Huang]

Hi Lan,

Did Herfried and my suggestion help you?
If you have any conern on this issue, please post here.

Best regards,

Peter Huang
Microsoft Online Partner Support

Get Secure! - www.microsoft.com/security
This posting is provided "AS IS" with no warranties, and confers no rights.