Self installing services

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

I have a simple service written in VB.net that can be installed and removed
successfully using srvinst. I'd like to make this file self installing though
(for example, run from the command line with an argument to get it
instantiated in the SCM). I've done this in the past by calling createprocess
WinAPI directly... but I'm guessing there must be a way to do this better in
VB.Net. I began looking at calling the Install method on ServiceInstaller and
ServiceProcessInstaller, but anything I try fails with a crash. From what I
can tell, MS does not expect you to write to these methods as they are to be
called by install programs. Usage and examples are hard to find.

Does anybody know how to call the ServiceInstall and ServiceProcessInstall
methods to install the service successfully?
 
Hello Burga,

If you are trying to install Windows Service created by VB .NET, can't you use InstallUtil to install it? What exactly do you need to accomplish on installation?
 
Burga said:
I have a simple service written in VB.net that can be installed and removed
successfully using srvinst. I'd like to make this file self installing
though
(for example, run from the command line with an argument to get it
instantiated in the SCM). I've done this in the past by calling
createprocess
WinAPI directly... but I'm guessing there must be a way to do this better
in
VB.Net. I began looking at calling the Install method on ServiceInstaller
and
ServiceProcessInstaller, but anything I try fails with a crash. From what
I
can tell, MS does not expect you to write to these methods as they are to
be
called by install programs. Usage and examples are hard to find.

Does anybody know how to call the ServiceInstall and ServiceProcessInstall
methods to install the service successfully?
Click to expand...

Create your service following this walkthrough
http://msdn.microsoft.com/library/d...kthroughcreatingwindowsserviceapplication.asp

You will add an installer class to your service assembly. This installer
class knows how to intall or install your service. Usually the installer
class is invoked by the InstallUtil utility. Here's a description of what
InstallUtil does

Installutil.exe uses reflection to inspect the specified assembly and find
all Installer types with the RunInstallerAttribute set to true. The tool
then executes either the Install Method or the Uninstall Method on each
instance of the Installer type. Installutil.exe performs installation in a
transactional manner; if one of the assemblies fails to install, it rolls
back the installations of all other assemblies. Uninstall is not
transactional.

http://msdn.microsoft.com/library/d.../html/cpconinstallerutilityinstallutilexe.asp


Here's an article on how to write your own code to invoke your installer, so
you don't need installUtil

http://groups.google.com/[email protected]&output=gplain


David
 
Thanks David. I tried making that work, but I get the following exception
when I try to set the context.
An unhandled exception of type 'System.NullReferenceException'
occurred in system.configuration.install.dll

Additional information:
Object reference not set to an instance of an object.

I am working in VB.net, so I had to change the provided code a little from
the c# sample. I experimented a little also, and the following is what I
currently have:

Dim ti As New TransactedInstaller
Dim mi As New ProjectInstaller
Dim cmdline(1) As String

ti.Installers.Add(mi)
cmdline(0) =
System.Reflection.Assembly.GetExecutingAssembly().Location
ti.Context = (New InstallContext("", cmdline))
ti.Install(New Hashtable)

Any idea why I should be getting that exception when setting ti.exception?
This might be really obvious to someone who has done this before...

Thanks!
 
Back
Top