NET引擎服务开发与不能捕获的异常

NET开发ServiceBase系统引擎服务，在服务的运行过程中捕获NETFRAMEWORK不能捕获的异常

 

在制作引擎服务的过程中，可能遇到Try Catch 之外的异常导致服务停止，所以同时需要处理这种异常，保证引擎的正常运行。

 

服务：

1. 在Main组件中继承System.ServiceProcess.ServiceBase类，并重写OnStart方法启动服务。

2. 在CMDInstall组件中继承System.Configuration.Install.Installer类，并重写OnAfterInstall方法，以使在CMD命令中可以使用install安装服务。

不能捕获的异常：

在TestEngineException类的析构函数中制作一个错误的运算，抛出异常。

 

启动函数：Program类中调用ServiceBase.Run() 启动服务。

 

完整代码：

 

using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Linq; using System.Text; using System.ServiceProcess; namespace EnginTest { public partial class Main : ServiceBase { public Main() { InitializeComponent(); } static void UnhandledExceptionEventHandler(object sender, UnhandledExceptionEventArgs e) { WriteLog("不能捕获的异常【" + DateTime.Now.ToString() + "】：" + e.ExceptionObject.ToString()); } protected override void OnStart(string[] args) { Start(); } protected override void OnStop() { } public void Start() { // System.Windows.Forms.MessageBox.Show("111111111"); AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(UnhandledExceptionEventHandler); try { TestEngineException testRaiseException = new TestEngineException(); } catch (Exception ex) { WriteLog("能捕获的异常【" + DateTime.Now.ToString() + "】：" + ex.Message); } } private static void WriteLog(string strError) { try { using (System.IO.FileStream fs = new System.IO.FileStream(@"c:/testengine.log", System.IO.FileMode.Append, System.IO.FileAccess.Write)) { using (System.IO.StreamWriter sw = new System.IO.StreamWriter(fs, System.Text.Encoding.UTF8)) { sw.WriteLine(strError + "/n"); } } } catch (Exception) { } } public class TestEngineException { public TestEngineException() { int i = 0; int j = 1 / i; } ~TestEngineException() { int i = 0; int j = 1 / i; } } } }

Main.Designer.cs类的InitializeComponent() 中可以调用 this.ServiceName = "EngineTest" 设置服务名称;

 

using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Linq; using System.Text; using Microsoft.Win32; using System.ServiceProcess; using System.Configuration.Install; using System.Collections; namespace EnginTest { [RunInstaller(true)] public class SvcInstaller : Installer { private static readonly string SVC_NAME = "EngineTest"; private static readonly string SVC_DESC = "This is the engine of the EngineTest "; public SvcInstaller() { Installers.Clear(); ServiceInstaller serviceInstaller = new ServiceInstaller(); serviceInstaller.StartType = ServiceStartMode.Automatic; serviceInstaller.ServiceName = SVC_NAME; serviceInstaller.DisplayName = SVC_NAME; serviceInstaller.Description = SVC_DESC; Installers.Add(serviceInstaller); ServiceProcessInstaller processInstaller = new ServiceProcessInstaller(); processInstaller.Account = ServiceAccount.LocalSystem; processInstaller.Password = null; processInstaller.Username = null; Installers.Add(processInstaller); } protected override void OnAfterInstall(IDictionary savedState) { RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SYSTEM/CurrentControlSet/Services/" + SVC_NAME , true ); if (key != null) { key.SetValue("Type", ((int)key.GetValue("Type") | 256)); } ServiceController controller = null; ServiceController[] controllers = ServiceController.GetServices(); for (int i = 0; i < controllers.Length; i++) { if (controllers[i].ServiceName == SVC_NAME) { controller = controllers[i]; break; } } if (controller == null) { return; } // if the service is not active, start it if (controller.Status != ServiceControllerStatus.Running) { try { controller.Start(); } catch { }; } } } }

 

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceProcess; namespace EnginTest { static class Program { static void Main() { #if !DEBUG ServiceBase[] ServicesToRun; ServicesToRun = new ServiceBase[] { new Main() }; ServiceBase.Run(ServicesToRun); //ServiceBase.Run(new Main()); #else new Main().Start(); #endif } } }

 

将真实环境中要启动引擎服务的CMD批处理文件拷贝到bin目录，运行intall.bat将启动服务，uninstall.bat停止服务。

intall.bat:

%WinDir%/Microsoft.NET/Framework/v2.0.50727/InstallUtil.exe EngineTest.exe

cmd.exe

uninstall.bat

%WinDir%/Microsoft.NET/Framework/v2.0.50727/InstallUtil.exe /u EngineTest.exe

cmd.exe

 

注：调试模式需要设置Debug模式，发布的状态请设置Release模式。

      调试模式不用运行CMD批处理。