running CommandPrompt from a Windows Service

Question

I have a Windows Service that will create a Process object and fire the command prompt with a specific command. The problem I am having is that apparently the command prompt is trying to open a window and I am getting the following error: Error: Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation. Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application. (System.InvalidOperationException) Can anyone help me to make this fire in the background using a windows service or do I have to go another way?

krishna prasad · Answer

Hai here is the code.Try this..- string commandLine = notepad.exe; ProcessStartInfo PSI = new ProcessStartInfo(cmd.exe); PSI.RedirectStandardInput = true; PSI.RedirectStandardOutput = true; PSI.RedirectStandardError = true; PSI.UseShellExecute = false; PSI.CreateNoWindow = false; Process p = Process.Start(PSI); System.IO.StreamWriter SW = p.StandardInput; System.IO.StreamReader SR = p.StandardOutput; SW.WriteLine(commandLine); SW.Close(); Here replace the command line string with the process u want to run or aanything u want to do..Here i have opened a notepad file.. Hope this helps....Fell free to ask.. ---------------------------------------------------------------------------------------------- If my answer helped u don't forget to mark it as correct answer

Tracy Baird · Answer

I have installed the service and it runs up and to the point when it tries to fire the command prompt using this code: Process process = new Process(); process.StartInfo.FileName = cmd.exe; process.StartInfo.RedirectStandardOutput = true; process.StartInfo.UseShellExecute = false; process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden; process.StartInfo.Arguments = @/C blahblah.exe; process.Start(); string results = process.StandardOutput.ReadToEnd(); That is where i get the error message.

krishna prasad · Answer

Hai u need to first install the service u have written and then only make it run.. Here is an article which shows step by step to create a windows service. http://aspalliance.com/1316_Working_with_Windows_Service_Using_Visual_Studio_2005.all Hope it helps. ----------------------------------------------------------------------------------------------- If my answer helped u don't forget to mark it as correct answer