Unable to execute Shell command in ASP.NET to print using DOS

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  • Start date Start date
G

Guest

Hi,

I have an ASP.NET application using VB.NET.I am sending a DOS command to a
machine on the network to print a file.
This is achieved using xp_cmdshell


Dim str As String = "xp_cmdshell ""type " & nwkfilepath & " > " &
pPrinterName & " """

and str is executed in the MSSQL Master database which has got permissions
to do it.


Problem Statement
******************
The same functionality could not be achieved using shell or diagnostics
namespace.The user ASP.NET has
already been given admin rights(as this is the user that executes an aspx
page)



Any help would be highly appreciated as this has snowballed into a major
production issue.


Regards

Kartik Ganesan
 
I believe the xp_cmdshell is using the permissions of the user that the SQL
Server itself runs under.

Also, are you getting an error??

Jeff
 
No am not getting any error..In fact
this is the code

Dim aa As Integer
aa = Shell("C:\XYZ\ABC.bat", AppWinStyle.MaximizedFocus)

and when i run in debug mode I get a value for aa..which is the process id.

ABC.bat contains the following lines

type C:\abc\myfile.KAR > \\mynetworkmachine\zebra234

where \\mynetworkmachine\zebra234 has been provided network share..

I mean ...this works
type C:\abc\myfile.KAR > \\mynetworkmachine\zebra234

when i execute this through dos.

Thanks in Anticipation

Kartik
 
Yes, a permissions issue most likely

Jeff
kartik said:
No am not getting any error..In fact
this is the code

Dim aa As Integer
aa = Shell("C:\XYZ\ABC.bat", AppWinStyle.MaximizedFocus)

and when i run in debug mode I get a value for aa..which is the process id.

ABC.bat contains the following lines

type C:\abc\myfile.KAR > \\mynetworkmachine\zebra234

where \\mynetworkmachine\zebra234 has been provided network share..

I mean ...this works
type C:\abc\myfile.KAR > \\mynetworkmachine\zebra234

when i execute this through dos.

Thanks in Anticipation

Kartik
Click to expand...
 
Actually no.I can execute file creations commands...more likely a
network issue.The following code from
http://www.thescarms.com/dotNet/Process.asp executes perfectly
fine.But when I execute my code it fails with exitcode = -1.

Sample Code from http://www.thescarms.com/dotNet/Process.asp
*****************************

Dim myProcess As Process = New Process()
Dim s As String
Dim outfile As String = Application.StartupPath & "\Output.txt"
'
' Get the System path.
'
Dim sysFolder As String =
System.Environment.GetFolderPath(Environment.SpecialFolder.System)
'
' Createe the command line.
'
myProcess.StartInfo.FileName = "cmd.exe"
myProcess.StartInfo.Arguments = "/C cd " & sysFolder & _
" && dir *.com >> " & Chr(34) & outfile & Chr(34) & " && exit"
'
' Start the process in a hidden window.
'
myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
myProcess.StartInfo.CreateNoWindow = True
myProcess.Start()
'
' Kill the process if it doesn't finish in one minute.
'
myProcess.WaitForExit(1000)
If Not myProcess.HasExited Then
myProcess.Kill()
End If
'
' Show the results.
'
MessageBox.Show("The 'dir' command window was " & _
"closed at: " & myProcess.ExitTime & "." &
System.Environment.NewLine & _
"Exit Code: " & myProcess.ExitCode)

myProcess.Close()



****************************



My Code
*******************************************************************************

Dim myProcess As Process = New Process()
Dim s As String
Dim outfile As String = "\\cafe500\zebra234"
'
' Get the System path.
'
Dim sysFolder As String =
System.Environment.GetFolderPath(Environment.SpecialFolder.System)
'
' Createe the command line.
'
myProcess.StartInfo.FileName = "cmd.exe"
'myProcess.StartInfo.Arguments = "/C cd " & sysFolder & " &&
dir *.com >> " & Chr(34) & outfile & Chr(34) & " && exit"
myProcess.StartInfo.Arguments = "/C type C:\\239301U2.KAR >
\\xyz\zebra234"
'
' Start the process in a hidden window.
'
myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
myProcess.StartInfo.CreateNoWindow = True
myProcess.Start()
'
' Kill the process if it doesn't finish in one minute.
'
myProcess.WaitForExit(1000)
If Not myProcess.HasExited Then
myProcess.Kill()
End If
'
' Show the results.
'
Response.Write("The 'dir' command window was " & _
"closed at: " & myProcess.ExitTime & "." &
System.Environment.NewLine & _
"Exit Code: " & myProcess.ExitCode)

myProcess.Close()



*******************************************************************************


I donno why it fails ..any help would be highly appreciated.


Kartik
 
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