asked on

VB Code write cmd.exe to file

I have a process that works.

On a button click it (WIth hidden widnow)
Runs cmd.exe
executes a java command
The cmd.exe is using an append to file with > myfile.txt

The process runs...opens a connection to my vendor and starts receiving the inbound data

Now this is an open connection so as long as this runs I will get a continuous stream of telephone data on our network.
(No...I don't work for the NSA...LOL)

I allso have a process.kill() command.

WHat I want is for this to continuously append to the file

BUt it looks like the file isn't written until I kill the process?
Is that the way it works?

I really need it going into the file in an ongoing manner

This is what is running

    Private Sub btnProcessStart_Click(sender As System.Object, e As System.EventArgs) Handles btnProcessStart.Click
        ' New ProcessStartInfo created
        Dim p As New ProcessStartInfo

        ' Specify the location of the binary
        p.FileName = "cmd.exe"
        p.WorkingDirectory = "C:\Program Files (x86)\Java\jre7\bin\"

        ' Use these arguments for the process
        p.Arguments = "/c java -cp m5.jar;m5-data-objects.jar;webservices-rt.jar;log4j-1.2.13.jar > C:\temp\Output3.txt"

        ' Use a hidden window
        p.WindowStyle = ProcessWindowStyle.Hidden

        ' Start the process
        Process.Start(p)

        Dim intResponse As Integer
        intResponse = MsgBox("End?", vbYesNoCancel, "Alert")
        If intResponse = vbYes Then
            For Each jr In Process.GetProcessesByName("Java")
                Try
                    
                    jr.Kill()
                
                Catch
                
                End Try
           
            Next
        End If
    End Sub

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Meir Rivkin

where's the code that writes to the file?
whats data do u wanna write to a file?

ASKER CERTIFIED SOLUTION

Nasir Razzaq

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Larry Brister

ASKER

CodeCruiser

On the StackFlow site...
Which of those solutions should I be using? I see 9 answers

angus_young_acdc

The first one.

And the alteration will be something like this:

            // Start the child process.
            Process p = new Process();
            // Redirect the output stream of the child process.
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.FileName = "YOURBATCHFILE.bat";
            p.Start();
            // Do not wait for the child process to exit before
            // reading to the end of its redirected stream.
            // p.WaitForExit();
            // Read the output stream first and then wait.
            string output = p.StandardOutput.ReadLine();
            string line = string.Empty;
            while ((line = p.StandardOutput.ReadLine()) != null)
            {
                output = line;
            }
            p.WaitForExit();

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angus_young_acdc

Sorry it's for VB!

        Dim p As New Process()
        p.StartInfo.UseShellExecute = False
        p.StartInfo.RedirectStandardOutput = True
        p.StartInfo.FileName = "YOURBATCHFILE.bat"
        p.Start()

        Dim output As String
        Dim line As String

        While ((line = p.StandardOutput.ReadLine()) != Nothing)
            output = line
        End While
        p.WaitForExit()

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SOLUTION

Nasir Razzaq

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Larry Brister

ASKER

CodeCruiser
As always...thanks