asked on

process object locking up files

when i have the .createnowindow=True, whenever the copy command is done, it never releases the copied file. I try to delete d:\test.txt when done, and it says being used by another process.

when i put the createnowindow=False it does not do this, but i get a shell pop up window where can see copy going on.
Isn't there a property to keep the createnowindow=True, but hide the window itself?

Dim cmdFile As New Process
With cmdFile.StartInfo
.FileName = "cmd.exe"
.arguments ="/c copy c:\test.txt d:\test.txt"
.CreateNoWindow = True
.UseShellExecute = True
End With
cmdFile.Start()
cmdFile.WaitForExit(-1)
cmdFile.Dispose()

Wayne Taylor (webtubbs)

If you are only copying files, it is better to use something like this....

System.IO.File.Copy("C:\text.txt", "D:\test.txt", True)

Regards,

Wayne

rkneal

ASKER

sorry, i should have said in last post, that we are really running a very detailed windows volume shadow copy, so the above filename is really a .bat file that gets run by the process command. It is copying about 1G of data over a network from a proprietary system. As stated above if i put the .createOnWindow=True it does not lock up the files, but i can see the window pop up.

Mohamed Zedan

Did you try calling the batch file only without cmd.exe it should work and do what you want
also use xcopy better.

Process.Start("xcopy", "c:\test.txt d:\test.txt")

Mohamed Zedan

And try it with .createwindow = false it should be ok ...

ASKER CERTIFIED SOLUTION

Mohamed Zedan

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

rkneal

ASKER

we can't use xcopy, it does not allow to copy open files.
if you look at the windows volume copy service, it allows you to copy open files so this is the mechanism we use to do this.

But, your answer above is allowing me to control the window state of the command window, so it works!

thanks
Bob

Mohamed Zedan

Glad it helped :)

rkneal

ASKER

followup comment, i had to still make the .useshellexecute = true to make this not lock up the files, :)

Dim cmdfile As New ProcessStartInfo
With cmdfile
.FileName = rFileStr
'.RedirectStandardOutput = True
.CreateNoWindow = True
.UseShellExecute = True
cmdfile.WindowStyle = ProcessWindowStyle.Hidden
End With

Process.Start(cmdfile)
Process.Start(cmdfile).WaitForExit(1000)
Process.Start(cmdfile).Dispose()

rkneal

ASKER

thanks again!, at least not one can see the window popping up with your solution to control the processWindowStyle property.

Mohamed Zedan

These lines cause you to call the copy three times

Process.Start(cmdfile)
Process.Start(cmdfile).WaitForExit(1000)
Process.Start(cmdfile).Dispose()

instead do this....

dim p as process = new process
p.start(cmdFile)
p.waitforexit(1000)
p.dispose

Mohamed Zedan

you're welcome again .... :) but see the comment above ^^^

rkneal

ASKER

i see! thanks

rkneal

ASKER

just a last comment, i downloaded a free program called unlocker. This allowed me to see who was locking the files. Ends up being the vb.net app was not locking them, but McAfee antivirus!! This unlocker program allows you to see that, then tell it to unlock it. Pretty cool for free

Thanks for help.