I have a VB.net program in which I call the Shell function. I would like to get the text output that is produced from this code in a file. However, this is not the return value of the executed code so I don't really know how to.
This program is a service but has access to the disk no problem as I already log other information. The whole service has multiple threads so I must also make sure that when the file is written it's not already accessed.
You won't be able to capture the output from Shell.
You will need to change this to a process and you will need to capture the the Standard Output (and possibly Error) streams from the process.
Here is an example:
Dim oProcess As New Process()
Dim oStartInfo As New ProcessStartInfo("ApplicationName.exe", "arguments")
oStartInfo.UseShellExecute = False
oStartInfo.RedirectStandardOutput = True
oProcess.StartInfo = oStartInfo
oProcess.Start()
Dim sOutput As String
Using oStreamReader As System.IO.StreamReader = oProcess.StandardOutput
sOutput = oStreamReader.ReadToEnd()
End Using
Console.WriteLine(sOutput)
To get the standard error:
'Add this next to standard output redirect
oStartInfo.RedirectStandardError = True
'Add this below
Using oStreamReader As System.IO.StreamReader = checkOut.StandardError
sOutput = oStreamReader.ReadToEnd()
End Using
Just pipe the output to a text file?
MyCommand > "c:\file.txt"
Then read the file.
MyCommand > "c:\file.txt 2>&1 if you also want to capture error reports in the file. By default error outputs are not included in the file.
Dim proc As New Process
proc.StartInfo.FileName = "C:\ipconfig.bat"
proc.StartInfo.UseShellExecute = False
proc.StartInfo.RedirectStandardOutput = True
proc.Start()
proc.WaitForExit()
Dim output() As String = proc.StandardOutput.ReadToEnd.Split(CChar(vbLf))
For Each ln As String In output
RichTextBox1.AppendText(ln & vbNewLine)
lstScan.Items.Add(ln & vbNewLine)
Next
======================================================================= create a batch file in two lines as shown below:
echo off
ipconfig
' make sure you save this batch file as ipconfig.bat or whatever name u decide to pick but make sure u put dot bat at the end of it.
