陈叙远的世界

最近由于工作需要，写了一个windows服务程序，有许多经验，我会陆续写出来。
请原谅我从安装谈起，因为我一直有一个误区：只要从System.ServiceProcess.ServiceBase继承一个类并编译好就可以用.net提供的命令行程序InstallUtil.exe安装了。经过尝试，发现如果仅仅做了这样的一个类是无法用InstallUtil.exe安装的，在安装时会输出下面的信息：

D:\>installutil windowsservice2.exe Microsoft (R) .NET Framework Installation utility Version 1.1.4322.573 Copyright (C) Microsoft Corporation 1998-2002. All rights reserved. Running a transacted installation. Beginning the Install phase of the installation. See the contents of the log file for the d:\windowsservice2.exe assembly's progr ess. The file is located at d:\windowsservice2.InstallLog. Installing assembly 'd:\windowsservice2.exe'. Affected parameters are: assemblypath = d:\windowsservice2.exe logfile = d:\windowsservice2.InstallLog No public installers with the RunInstallerAttribute.Yes attribute could be found in the d:\windowsservice2.exe assembly. The Install phase completed successfully, and the Commit phase is beginning. See the contents of the log file for the d:\windowsservice2.exe assembly's progr ess. The file is located at d:\windowsservice2.InstallLog. Committing assembly 'd:\windowsservice2.exe'. Affected parameters are: assemblypath = d:\windowsservice2.exe logfile = d:\windowsservice2.InstallLog No public installers with the RunInstallerAttribute.Yes attribute could be found in the d:\windowsservice2.exe assembly. Remove InstallState file because there are no installers. The Commit phase completed successfully. The transacted install has completed.
这是因为installUtil.exe会用反射的方法去查找所有把RunInstallerAttribute设置为true的System.Configuration.Install.Installer类型，并执行上面的Install方法，当找不到的时候，安装就失败了。
所以我们必须要写一个从Installer类继承的类来满足installUtil.exe的要求。