C # Windows Services

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• Append a running Windows Service

Compile a Windows ServiceProgram, Regularly extract records from the database to send emails.

Test environment: Visual Studio 2005 SP1, Windows Server 2003 sp2

1. Create a project

Open vs2005,Create a "Windows Service"Project.

2. Add Timer

Expand the "toolbox" and double-click "timer" under the "component" tab. Then, a timer component is added, change "name" to "timemail", "enabled" to "false", and "interval" to "60000 ".

Next, we will do some repair work. I don't know if I have not found a place for the vs2005 bug. This problem does not exist in vs2003: the "timer" just added under "component" should come from "system. timers namespace ", also only" system. timers. timer "can work normally in the Windows service program, but now this timer belongs to" system. windows. forms. timer. So you have to make some modifications. Open the ". Designer. cs" file and modify it as follows:

# Region Generated by the component designerCode //... /// <Summary> /// Required methods supported by the designer-do not /// Use the code editor to modify the content of this method. /// </Summary> Private Void Initializecomponent (){ This . Components = New System. componentmodel. Container (); // This. timemail = new system. Windows. Forms. Timer (this. components); original This . Timemail = New System. Timers. Timer (); // Change This . Timemail. Interval = 60000 ; This . Servicename = " Service1 " ; } # Endregion // Private system. Windows. Forms. Timer timemail; original Private System. Timers. Timer timemail; // Change

3. Add a configuration file

Each time the service calls the configuration file, it obtains some basic parameters, so that some changes can directly modify the configuration file without having to modify the code. The new serviceconfig. xml file is stored in the project "bin \ debug:

<? XML version = "1.0" encoding = "UTF-8" ?> < Serviceconfig > < Serviceitem Name = "Sendemail" Enable = "True" Elapsed = "60000" Connectionstring = "Your database connection ..." SMTP = "SMTP address" Account = "Your email account ..." Password = "Your password ..." > </ Serviceitem > </ Serviceconfig >

4. The following is the implementation code

Using System; Using System. Collections. Generic; Using System. componentmodel; Using System. Data; Using System. diagnostics; Using System. serviceprocess; Using System. text; Using System. xml; // Operation configuration file Using System. IO; // Write logs Using System. Threading; // Thread used Namespace Clientwindowsservice { Public Partial Class Clientservice: servicebase { Public Clientservice () {initializecomponent ();}
Protected Override Void Onstart ( String [] ARGs ){ // Service Startup This . Timemail. Enabled = True ; This . Tsendemail ();}
Protected Override Void Onstop (){ // Service stopped This . Timemail. Enabled = False ;}
Private Void Timemail_elapsed ( Object Sender, system. Timers. elapsedeventargs e ){ // Timer This . Tsendemail ();}
// Enable new process to send emails Private Void Tsendemail () {thread t = New Thread ( New Threadstart (sendemail); T. Start ();}
// Email sending Function Private Void Sendemail () {xmldocument Doc = New Xmldocument (); // Add system. Windows. Forms reference to get the execution directory String Configfile = System. Windows. Forms. application. startuppath. tostring () + " \ Serviceconfig. xml " ; Doc. Load (@ configfile); xmlelement Root = Doc. documentelement; Foreach (Xmlnode Node In Root ){ // If the service is enabled in the configuration file If (Node. attributes [ " Name " ]. Value = " Sendemail " && Node. attributes [ " Enable " ]. Value = " True " ){ Try { // Read the database and send emails. } Catch (Exception error ){ // Write Error Log Using (Streamwriter SW = New Streamwriter (system. Windows. Forms. application. startuppath. tostring () + @" " + Datetime. Now. tostring ( " Yyyy-mm-dd " ) + " . Txt " , True , System. Text. encoding. utf8) {Sw. writeline (datetime. Now. tostring () + " : " ); Sw. writeline (error. tostring (); Sw. writeline ( " --------------------------------------------- " ); Sw. Close ();}}}} // End foreach }
} // End Class } // End namespace

V. Deployment services

In design mode, right-click --> add installer --> set the account of serviceprocessinstaller1 to LocalSystem

Set starttype of serviceinstaller1 to automatic

Compile

Run: % SystemRoot % \ microsoft.net \ framework \ v2.0.50727 \ installutil.exe D: \ project directory \ bin \ debug \ executable file name. .exe in command mode. Each time you need to modify the Windows service, this requires you to uninstall and reinstall the service. However, it is a good habit to ensure that the service management console is closed before you uninstall the service. If this is not the case, you may encounter problems when uninstalling and re-installing Windows Services. If you only uninstall the service, you can run the installutil command to log out of the service. However, you need to add a/u command to the end.
Debug Windows Services

From another perspective, debugging Windows Services is totally different from a common application. More steps are required to debug Windows Services. Services cannot be debugged as long as they are simply executed in the development environment as you do for common applications. The service must be installed and started first. We have done this in the previous section. To facilitate code tracing and debugging, once the service is started, you must use Visual Studio to append the running process (attach ). Remember, any modifications made to your Windows service must be uninstalled and reinstalled.

Append a running Windows Service

To debug the program, some operating instructions for the Windows Service are attached. These operations assume that you have installed the Windows service and it is running.

1. use Visual Studio to load this project 2. click "debug" menu 3. click process menu 4. make sure that the system process is selected. in the list of available processes, locate the process on your Executable File Name and click it 6. click the additional button. 7. click OK 8. click CLOSE 9. set a breakpoint in the timer1_elapsed method and wait for it to execute

6. Download CodeHttp://files.cnblogs.com/linckle/log.rar