My command:
c:\temp\abc.exe c:\temp\abc.ini >> c:\temp\log.log
This works fine when executed by the command prompt.
But from VB.NET, it doesn't work (the log file was created but blank, the log file should contain log processes of abc.exe, abc.exe was not executed also).
Dim p as Process = new Process()
Dim pi as ProcessStartInfo = new ProcessStartInfo()
pi.Arguments = "/C c:\temp\abc.exe c:\temp\abc.ini >> c:\temp\log.log "
pi.FileName = "cmd.exe"
p.StartInfo = pi
p.Start()
p.WaitForExit()
Why?
Update: While waiting for an explanation, this is my workaround.
Dim p as Process = new Process()
Dim pi as ProcessStartInfo = new ProcessStartInfo()
pi.Arguments = "c:\temp\abc.ini"
pi.FileName = "c:\temp\abc.exe"
p.StartInfo = pi
p.Start()
Dim output as String = p.StandardOutput.ReadToEnd()
p.WaitForExit()
WriteLog("c:\temp\log.log", output)
Related
I know that the 2 commands I need to run are:
pkgmgr /iu:"TelnetClient"
Telnet Towel.blinkenlights.nl
I would like it to keep cmd open after running Telnet Towel.blinkenlights.nl.
This is what I have tried:
Dim start As New Process()
start.StartInfo.FileName = "cmd.exe"
start.StartInfo.Arguments = "/c pkgmgr /iu:" & """" & "TelnetClient" & """"
start.StartInfo.CreateNoWindow = True
start.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
start.StartInfo.UseShellExecute = False
start.Start()
System.WaitForExit()
Dim playSW As New Process()
playSW.StartInfo.FileName = "cmd.exe"
playSW.StartInfo.Arguments = "/k Telnet Towel.blinkenlights.nl"
playSW.Start()
playSW.WaitForExit()
You can use the Process's WaitForExit command to ensure a process is completed:
Dim start As New Process()
start.StartInfo.FileName = "cmd.exe"
start.StartInfo.Arguments = "/c pkgmgr /iu:" & """" & "TelnetClient" & """"
start.StartInfo.CreateNoWindow = True
start.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
start.StartInfo.UseShellExecute = False
start.Start()
start.WaitForExit()
Dim playSW As New Process()
playSW.StartInfo.FileName = "cmd.exe"
playSW.StartInfo.Arguments = "/c Telnet Towel.blinkenlights.nl"
playSW.Start()
playSW.WaitForExit()
Reference: https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.process.waitforexit?view=netframework-4.7.2
Hey i am programming in Visual Basic (VB.NET) and i am trying to run cmd commands without showing the cmd screen on the computer, I have the following code but i cant get it to hide it.. :(
Code:
Dim CMD As New Process
CMD.StartInfo.FileName = "cmd.exe"
CMD.StartInfo.UseShellExecute = False
CMD.StartInfo.RedirectStandardInput = True
CMD.StartInfo.RedirectStandardOutput = True
CMD.StartInfo.CreateNoWindow = True
CMD.Start()
Dim SW As System.IO.StreamWriter = CMD.StandardInput
Dim SR As System.IO.StreamReader = CMD.StandardOutput
SW.WriteLine("exit")
Process.Start("Cmd.exe", "/C systeminfo > C:\Users\" & Environment.UserName & "\Pictures\hello.txt")
Thread.Sleep(5000)
Ugly code aside, you can basically do it like this:
Dim CMD As New Process
CMD.StartInfo.FileName = "cmd.exe"
CMD.StartInfo.UseShellExecute = False
CMD.StartInfo.RedirectStandardInput = True
CMD.StartInfo.RedirectStandardOutput = True
CMD.StartInfo.CreateNoWindow = True
CMD.Start()
Dim SW As System.IO.StreamWriter = CMD.StandardInput
Dim SR As System.IO.StreamReader = CMD.StandardOutput
SW.WriteLine("exit")
Dim p2 As New Process
p2.StartInfo.FileName = "Cmd.exe"
p2.StartInfo.Arguments = "/C systeminfo > C:\Users\" & Environment.UserName & "\Pictures\hello.txt"
p2.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
p2.Start()
Thread.Sleep(5000)
Process.Start is a static method with a limited set of parameters for modifying its behavior.
So where you give the name of the .exe and the parameters via the static method
Process.Start("Cmd.exe", "/C systeminfo > C:\Users\" & Environment.UserName & "\Pictures\hello.txt")
, is similar to:
Dim p2 As New Process
p2.StartInfo.FileName = "Cmd.exe"
p2.StartInfo.Arguments = "/C systeminfo > C:\Users\" & Environment.UserName & "\Pictures\hello.txt",
p2.Start()
But by doing it like that you have many more options available, including the option to set the WindowStyle to hidden:
p2.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
I want to stop a windows service in a different service.
When I run the below code in a desktop app, it works correctly but same code doesn't work in a Windows Service app.
Is somebody has any idea?
PS: I tried to use SC stop instead of net stop but the result is exactly the same.
Dim p As Process = New Process()
Dim pi As ProcessStartInfo = New ProcessStartInfo()
pi.Arguments = " " + "/K" + " " + "net stop MyService"
pi.CreateNoWindow = True
pi.UseShellExecute = True
pi.FileName = "cmd.exe"
pi.Verb = "runas"
p.StartInfo = pi
p.Start()
I'm encountering an issue with the Process.start() method in VB.Net.
I'm trying to execute an ipconfig /all and set a variable with the StandardOutput.ReadToEnd() method.
It works well if I execute the application locally, but when I place the EXE on a network share, my variable is not set with the result of the command.
It seems it cannot retrieve the output of the command.
Can you please help me?
Thank you in advance.
Here is my code:
Dim p As New Process
Dim psi As New ProcessStartInfo
psi.FileName = "cmd.exe"
psi.Arguments = "/c ipconfig /all"
psi.UseShellExecute = False
psi.RedirectStandardOutput = True
p.StartInfo = psi
p.Start()
Dim output As String = p.StandardOutput.ReadToEnd
p.WaitForExit()
MsgBox(output)
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.
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.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