Issue on writing and executing commands within a .bat file from VB.NET in Grasshopper

I everyone,

I am trying to write commands into a .bat file and then run it inside a VB component. To help solve the issue I use the following simple code:

Private Sub RunScript(ByVal x As Boolean)

Dim content As String
Dim path As String

content = "@ECHO" & vbCr & _
"ECHO Test" & vbCr & _
"PAUSE"

path = "C:\Users\test.bat"

File.WriteAllText(path, content)
If x Then Diagnostics.Process.Start(path)
End Sub

It works fine for writing this on .bat file:

@ECHO
ECHO Test
PAUSE

But when trying to run the .bat, the cmd window opens and closes immediately without running commands. Does anybody has an idea of the issue?

Thanks,

Attachments:

test.jpg, 14 KB

Replies to This Discussion

Permalink Reply by David Rutten on April 23, 2014 at 11:20am

No idea. Do note that vbCr is not a good thing to use. It only encodes the Carriage Return and omits the LineFeed. It's better to use Environment.NewLine, which works no matter what the local conventions are.

Does the bat file work if you double click it in Explorer?

David Rutten

david@mcneel.com

Permalink Reply by Ioan Levi on April 24, 2014 at 3:15am

Okay I changed from "vbCr" to "vbNewline" to do the carriage return and line feed and it works fine!
Without that, the bat file didn' lauched in explorer neither.

Thanks for your advice.

Permalink Reply by David Rutten on April 24, 2014 at 3:41am

I didn't say vbNewLine. Use Environment.NewLine as it's the same between VB and C# and it's platform independent.

David Rutten

david@mcneel.com

Permalink Reply by Danny Boyes on April 23, 2014 at 11:30am

Have you tried the /K approach of launching the file?

cmd /k C:\Users\test.bat

Permalink Reply by Ioan Levi on April 24, 2014 at 3:30am

I didn't thought to use this, when using "vbCr" instead of "vbNewline" it clearly shows that no code is running in cmd which I caught a sight of when the window open and close immediately.

Thanks for the tips, it works fine since I replaced "vbCr" by vbNewline.

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