[RESOLVED] [2005] Command Prompt

[tylerm]

I'm trying to run a file called mkisofs.exe via command prompt like so:

    Private Sub CMDAutomate()
        Dim myProcess As New Process
        Dim StartInfo As New System.Diagnostics.ProcessStartInfo
        StartInfo.FileName = "cmd"
        StartInfo.RedirectStandardInput = True
        StartInfo.RedirectStandardOutput = True
        StartInfo.UseShellExecute = False
        StartInfo.CreateNoWindow = True
        myProcess.StartInfo = StartInfo
        myProcess.Start()
        Dim SR As System.IO.StreamReader = myProcess.StandardOutput
        Dim SW As System.IO.StreamWriter = myProcess.StandardInput
        SW.WriteLine(Convert.ToChar(34) & "C:\record\mkisofs.exe" & Convert.ToChar(34) & " -J -joliet-long -jcharset " & Convert.ToChar(34) & "iso8859-1" & Convert.ToChar(34) & " -l -r -V " & Convert.ToChar(34) & txtLabel.Text & Convert.ToChar(34) & " -o " & Convert.ToChar(34) & "C:\TEST.iso" & Convert.ToChar(34) & " " & Convert.ToChar(34) & "D:\" & Convert.ToChar(34))
        SW.WriteLine("exit")
        Results = SR.ReadToEnd
        MsgBox(Results)
        SW.Close()
        SR.Close()
    End Sub

mkisofs.exe takes a long time to complete it's task, but for some reason that code exits out seconds after starting. I've tested the command to run mkisofs and it works, so it's gotta be something with code.


My second question is how to constantly get updates from the command prompt, eg: Run mkisofs.exe via command prompt, get every new line (MKISOFS.exe creates a new line saying:
10%
20%
30% complete, blah blah blah

So I can update my app's progress bar.

[Negative0]

First of all, I don't think you need to launch the command prompt. I think you can start the process and redirect the standard input to your application and you will get the same effect.

Second, I think instead of doing a readtoend, you need to continually read the stream readers output and process the percentages. Doing a ReadToEnd will probably read whatever is currently in the stream and then be done, while the process is still actually working.

[tylerm]

My problem with starting the exe directly is I get this message:

StandardOut has not been redirected or the process hasn't started yet.

[joe1985]

Here is some code I slapped together

 
Dim p As New Process
Dim zztop As New ProcessStartInfo

        zztop.CreateNoWindow = True
        zztop.Arguments = "yahoo.com"
        zztop.FileName = "nslookup"
        zztop.RedirectStandardOutput = True
        zztop.UseShellExecute = False

        p.StartInfo = zztop
        p.Start()

        Dim stream1 As String = p.StandardOutput.ReadToEnd
        RichTextBox1.Text = stream1

I think that will head you in the write direction at least, and you can probably figure out the rest.

- Joe

[tylerm]

Sweet, it worked. Now I just need to read the text as it's created.

[joe1985]

Sorry for giving you a fish but.....

    Do Until p.StandardOutput.EndOfStream = True
            Console.WriteLine(p.StandardOutput.ReadLine())
        Loop

- Joe

[tylerm]

I noticed an issue so far, with my method and yours, with mkisofs.exe, if you run with Output = True and ShellExec = False, it ends at around 2,000kb usage (Task manager).

Meaning, it doesn't create or do anything if RedirectOutput = True and UseShellExec = False