TeamGB TeamGB - 1 month ago 22
Vb.net Question

Run CMD Silently

I'm trying to run CMD silently, but each time I get an error. Could someone please tell me where I'm going wrong?

Dim myProcess As Process
myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
myProcess.StartInfo.CreateNoWindow = True
myProcess.StartInfo.FileName = ("cmd.exe" & CmdStr)
myProcess.Start()


CmdStr is already a string to do certain things that I want in the application.

Answer

I suppose your cmdStr is a string with parameters for CMD.
If so you need to use the Arguments property of StartInfo.
You get a Null Exception on the myProcess variable because it is never instatiated with new. You could create a ProcessStartInfo var to use with the static Process.Start method and set the UseShellExecute to False

Dim startInfo As New ProcessStartInfo("CMD.EXE")
startInfo.WindowStyle = ProcessWindowStyle.Minimized
startInfo.WindowStyle = ProcessWindowStyle.Hidden     
startInfo.CreateNoWindow = True 
startInfo.UseShellExecute = False
startInfo.Arguments = CmdStr
Process.Start(startInfo)  

or edit your code to add

myProcess = new Process() 

before using the var myProcess

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