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New Message on BDOTNET
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From: Mahesh ChandraMouli
Message 2 in Discussion
Hi Vipul, Take an example, If your application uses classes that inherit from
System.EnterpriseServices.ServicedComponent these classes must be registered with
COM+. ServicedComponents can register automatically the first time they run but this
works only if the process running them has administrative privileges. ASP.NET does
not run with Administrative privileges (unless you set it to run as SYSTEM) so when
ServicedComponents try to register they will fail with an Access Denied exception.
The setup project can be configured to execute custom actions as a part of the install
or uninstall of your application. All you need to do is to create a class as a part
of your assembly that inherits from System.Configuration.Install.Installer and add a
custom install action to your project. To add an installer class to your serviced
component assembly: 1. Right click on your serviced component project 2.
Select Add / New Item� this will display the Add New Item dialog 3. In the
Categories pane select Code 4. In the Templates pane select Installer Class
Installer Class
In the newly created installer class, you will need to override the Install and
Uninstall methods. You can use the System.EnterpriseServices.RegistrationHelper class
to handle registration and un-registration during install and un-install. Install
At installation time the registration helper class will return the ApplicationID of
the newly created COM+ application. The Install class passes an IDictionary interface
that you can use to save state captured during installation. You will need to save
the Assembly name and the AppID to use later during un-install. Tip: If an exception
occurs during installation, the installer will display the exception text which may
leave users confused. A best practice is to capture the exception text to a log file
and display a user friendly exception message instead. public override void
Install(System.Collections.IDictionary stateSaver) { try {
string AppID = null; string TypeLib = null; // Get the
location of the current assembly string Assembly =
GetType().Assembly.Location; // Install the application
RegistrationHelper rh = new RegistrationHelper (); rh.InstallAssembly (Assembly, ref
AppID, ref TypeLib, InstallationFlags.FindOrCreateTargetApplication); //
Save the state - you will need this for the uninstall stateSaver.Add
("AppID", AppID); stateSaver.Add ("Assembly", Assembly); }
catch(Exception ex) { #if DEBUG Debug.WriteLine (ex); #endif
StreamWriter sw = File.AppendText ("InstallError.log"); sw.WriteLine
("Uninstall Error: {0}", ex.Message); // If the installer catches the
exception it will display // an error message. Show a friendly error
message throw new ApplicationException( "Error installing the middle
tier", ex); } } Checkout this sample also
http://www.c-sharpcorner.com/Code/2003/Dec/CustomInstallMG.asp Regards Mahesh
ChandraMouli Microsoft .NET MVP|MCAD
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