Issue with running a bat file programatically from a com interop dll on classic asp

Question

I am facing a predicament with running a bat file using the system.diagnostics.process object. I have the code for running a bat file in a class library which I compiled to a dll. I made the dll com interoperable by registering it using compile time. I signed it using strong key, exported the type library and put the dll into GAC using regasm and gacutil commands. I then created the object of the specific class in the dll that has the method for the bat file execution using the server.createobject method in vbscript. I then called the method for the bat execution. Method gets invoked alright but the cmd prompt is not popping up nor is the bat file being executed. I checked to see if its a problem with the interop dll but the dll worked fine with VB6 code. Can someone help me with this issue? I am not sure if its some permission issue on the IIS server. Or is cmd executions not possible via vbscript on ASP for dlls?

Thanks, Geo.

Does your batch invocation command include cmd.exe? I think, it should be something like cmd.exe /C yourscript.bat. — Andriy M
IIS 6/7 by default the DefaultAppPool runs as NETWORK SERVICE, IIS 7.5 runs as DefaultAppPool. learn.iis.net/page.aspx/624/application-pool-identities — ThatGuyInIT

ThatGuyInIT ThatGuyInIT · Accepted Answer · 2011-07-09T19:56:59

Apparently you may need to run cmd and then just inject input into it:

// Get the full file path
string strFilePath = "c:\\temp\\test.bat";

// Create the ProcessInfo object
System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("cmd.exe");
psi.UseShellExecute = false; 
psi.RedirectStandardOutput = true;
psi.RedirectStandardInput = true;
psi.RedirectStandardError = true;
psi.WorkingDirectory = "c:\\temp\\";

// Start the process
System.Diagnostics.Process proc = System.Diagnostics.Process.Start(psi);

// Open the batch file for reading
System.IO.StreamReader strm = System.IO.File.OpenText(strFilePath);

// Attach the output for reading
System.IO.StreamReader sOut = proc.StandardOutput;

// Attach the in for writing
System.IO.StreamWriter sIn = proc.StandardInput;

// Write each line of the batch file to standard input
while(strm.Peek() != -1) {
  sIn.WriteLine(strm.ReadLine());
}

strm.Close();

// Exit CMD.EXE
string stEchoFmt = "# {0} run successfully. Exiting";

sIn.WriteLine(String.Format(stEchoFmt, strFilePath));
sIn.WriteLine("EXIT");

// Close the process
proc.Close();

// Read the sOut to a string.
string results = sOut.ReadToEnd().Trim();

// Close the io Streams;
sIn.Close(); 
sOut.Close();

http://codebetter.com/brendantompkins/2004/05/13/run-a-bat-file-from-asp-net/

Issue with running a bat file programatically from a com interop dll on classic asp

1 Answers