error in running bat file though vb.net

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Hi Everyone,

I am creating and calling a batch file from vb.net to run a java program(java command inside bat file).

The bat file is creating fine....but while running it some kind of weird sign is coming in front of the java command that is stopping system from recognizing java as any type of command.
I wonder what could be that thing!!!

here's code I used:

VB

Imports System
Imports System.IO

Module Module1

    Sub Main()

        Dim str, s1 As String

        s1 = "wednesday"
        str = "java pname """ & s1 & """"

        File.Create("D:\sa\MSG\sms_old\send.bat").Dispose()

        My.Computer.FileSystem.WriteAllText("D:\sa\MSG\sms_old\send.bat", str.Trim(), False)


        Dim processinfo As New ProcessStartInfo()
        processinfo.WorkingDirectory = "D:\sa\MSG\sms_old"
        processinfo.FileName = "send.bat"
        Process.Start(processinfo)

    End Sub

End Module

This should have produced this in command prompt:

D:\sa\MSG\sms_old>java pname "wednesday"

But it is producing something like this:

D:\sa\MSG\sms_old>∩╗┐java pname "wednesday"

Can anyone throw any light on it?

Thanks a lot!!!

Posted 22-Jul-14 20:18pm

planetz

Updated 22-Jul-14 21:14pm

v5

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Comments

OriginalGriff 23-Jul-14 2:40am

This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind.
Perhaps the code you use to run the batch file, and the batch file itself might help?
Use the "Improve question" widget to edit your question and provide better information.

2 solutions

Solution 2

Those weird characters are exactly 3 characters: they provide information on the encoding used in multi-byte encoded text files.
So it looks like ProcessStartInfo expects an ASCII (or other 8bit) encoded file.
System.IO.File.WriteAllText has overlaod which accepts an encoding parameter -

VB

System.IO.File.WriteAllText("D:\sa\MSG\sms_old\send.bat", str.Trim(), System.Text.Encoding.ASCII)

But of course, as OriginalGriff mentioned, you do not need the bat file, just use the command and parameters of the Process / ProcessStartInfo correctly

VB

System.Diagnostics.Process.Start("java", "pname """ & s1 & """)

Posted 22-Jul-14 21:40pm

Bernhard Hiller

Comments

planetz 23-Jul-14 6:18am

thank u for explaining what it meant.....:-)

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OriginalGriff · Accepted Answer · 2014-07-22T21:27:00

I can't see anything too wrong - except the file creation code which is unnecessary and rather odd.
I'd do it like this:

VB

Dim str, s1 As String

s1 = "wednesday"
str = "java pname """ & s1 & """"
File.WriteAllText("D:\sa\MSG\sms_old\send.bat", str.Trim())

Dim processinfo As New ProcessStartInfo()
processinfo.WorkingDirectory = "D:\sa\MSG\sms_old"
processinfo.FileName = "send.bat"
Process.Start(processinfo)

Or even use "java" as the process and the remainder as the arguments to the ProcessInfo object - ignoring a BAT file completely.