VB.Net Tutorial/Windows/Windows Service

Материал из VB Эксперт
Перейти к: навигация, поиск

Backup service

<source lang="vbnet">Imports System.Diagnostics Imports System.ServiceProcess Imports System.IO Public Class Service1

   Inherits System.ServiceProcess.ServiceBase
  1. Region " Component Designer generated code "
   Public Sub New()
       MyBase.New()
       " This call is required by the Component Designer.
       InitializeComponent()
       " Add any initialization after the InitializeComponent() call
   End Sub
   "UserService overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   " The main entry point for the process
   <MTAThread()> _
   Shared Sub Main()
       Dim ServicesToRun() As System.ServiceProcess.ServiceBase
       " More than one NT Service may run within the same process. To add
       " another service to this process, change the following line to
       " create a second service object. For example,
       "
       "   ServicesToRun = New System.ServiceProcess.ServiceBase () {New Service1, New MySecondUserService}
       "
       ServicesToRun = New System.ServiceProcess.ServiceBase() {New Service1()}
       System.ServiceProcess.ServiceBase.Run(ServicesToRun)
   End Sub
   "Required by the Component Designer
   Private components As System.ruponentModel.IContainer
   " NOTE: The following procedure is required by the Component Designer
   " It can be modified using the Component Designer.  
   " Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       "
       "Service1
       "
       Me.CanPauseAndContinue = True
       Me.CanShutdown = True
       Me.ServiceName = "BackupService"
   End Sub
  1. End Region
   Private WithEvents FileWatch As FileSystemWatcher
   Protected Sub OnChanged(ByVal From As Object, ByVal e As FileSystemEventArgs) Handles FileWatch.Changed
       Dim Log As New EventLog("Application")
       Log.Source = "BackupService"
       Log.WriteEntry("File " & e.Name & " changed at " & DateTime.Now)
       Log.WriteEntry("File " & e.FullPath & " changed at " & DateTime.Now)
       Log.Close()
       File.Copy(e.FullPath, "C:\Data\Backup\" & e.Name)
   End Sub
   Protected Sub OnCreated(ByVal From As Object, ByVal e As FileSystemEventArgs) Handles FileWatch.Created
       Dim Log As New EventLog("Application")
       Log.Source = "BackupService"
       Log.WriteEntry("File " & e.Name & " created at " & DateTime.Now)
       Log.WriteEntry("File " & e.FullPath & " created at " & DateTime.Now)
       Log.Close()
       File.Copy(e.FullPath, "C:\Data\Backup\" & e.Name)
   End Sub
   Protected Overrides Sub OnStart(ByVal args() As String)
       Try
           Directory.CreateDirectory("C:\Data")
           Directory.CreateDirectory("C:\Data\Backup")
           FileWatch = New FileSystemWatcher("C:\Data")
           FileWatch.Filter = "*.*"
           FileWatch.IncludeSubdirectories = True
           FileWatch.EnableRaisingEvents = True
           Dim Log As New EventLog("Application")
           Log.Source = "BackupService"
           Log.WriteEntry("Service started at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnPause(ByVal args() As String)
       Try
           FileWatch.EnableRaisingEvents = False
           Dim Log As New EventLog("Application")
           Log.Source = "BackupService"
           Log.WriteEntry("Service paused at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnContinue(ByVal args() As String)
       Try
           FileWatch.EnableRaisingEvents = True
           Dim Log As New EventLog("Application")
           Log.Source = "BackupService"
           Log.WriteEntry("Service continued at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnShutdown(ByVal args() As String)
       Try
           FileWatch.EnableRaisingEvents = False
           Dim Log As New EventLog("Application")
           Log.Source = "BackupService"
           Log.WriteEntry("Service shutdown at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Overrides Sub OnStop()
       Try
           FileWatch.EnableRaisingEvents = False
           Dim Log As New EventLog("Application")
           Log.Source = "BackupService"
           Log.WriteEntry("Service stopped at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub

End Class</source>

Inherits System.ServiceProcess.ServiceBase to create a service

<source lang="vbnet">Imports System.ServiceProcess Imports System.Timers Imports System.IO Imports System.Threading Imports System.Web.Mail Imports System.Diagnostics Public Class Service1

   Inherits System.ServiceProcess.ServiceBase
  1. Region " Component Designer generated code "
   Public Sub New()
       MyBase.New()
       " This call is required by the Component Designer.
       InitializeComponent()
       " Add any initialization after the InitializeComponent() call
   End Sub
   "UserService overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   " The main entry point for the process
   <MTAThread()> _
   Shared Sub Main()
       Dim ServicesToRun() As System.ServiceProcess.ServiceBase
       " More than one NT Service may run within the same process. To add
       " another service to this process, change the following line to
       " create a second service object. For example,
       "
       "   ServicesToRun = New System.ServiceProcess.ServiceBase () {New Service1, New MySecondUserService}
       "
       ServicesToRun = New System.ServiceProcess.ServiceBase() {New Service1()}
       System.ServiceProcess.ServiceBase.Run(ServicesToRun)
   End Sub
   "Required by the Component Designer
   Private components As System.ruponentModel.IContainer
   " NOTE: The following procedure is required by the Component Designer
   " It can be modified using the Component Designer.  
   " Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       "
       "Service1
       "
       Me.CanPauseAndContinue = True
       Me.CanShutdown = True
       Me.ServiceName = "BigFileCheck"
   End Sub
  1. End Region
   Private WithEvents Alarm As Timers.Timer = New Timers.Timer(300000) " 5 minutes
   Private BigFileNames As String = ""
   Sub SearchTree(ByVal Dir As String)
       Dim DirObj As New DirectoryInfo(Dir)
       Dim Files As FileInfo() = DirObj.GetFiles("*.*")
       Dim Dirs As DirectoryInfo() = DirObj.GetDirectories("*.*")
       Dim Filename As FileInfo
       For Each Filename In Files
           If Filename.Length >= 1048576 Then
               BigFileNames = Filename.FullName & Chr(13) & Chr(10)
           End If
       Next
       Dim DirectoryName As DirectoryInfo
       For Each DirectoryName In Dirs
           Try
               SearchTree(DirectoryName.FullName)
           Catch E As Exception
           End Try
       Next
   End Sub
   Public Sub CheckBigFiles()
       SearchTree("C:\")
       If (BigFileNames.Length > 0) Then
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "Check big file service"
           Log.WriteEntry("Big file found " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
       End If
   End Sub
   Public Sub OnTimedEvent(ByVal source As Object, ByVal e As ElapsedEventArgs) Handles Alarm.Elapsed
       Dim FileCheck As Thread
       FileCheck = New Thread(AddressOf CheckBigFiles)
       FileCheck.Start()
   End Sub
   Protected Overrides Sub OnStart(ByVal args() As String)
       Alarm.Enabled = True
   End Sub
   Protected Shadows Sub OnPause(ByVal args() As String)
       Alarm.Enabled = False
   End Sub
   Protected Shadows Sub OnContinue(ByVal args() As String)
       Alarm.Enabled = True
   End Sub
   Protected Shadows Sub OnShutdown(ByVal args() As String)
       Alarm.Enabled = False
   End Sub
   Protected Overrides Sub OnStop()
       Alarm.Enabled = False
   End Sub

End Class</source>

Log service

<source lang="vbnet">Imports System.Diagnostics Imports System.ServiceProcess Public Class Service1

   Inherits System.ServiceProcess.ServiceBase
  1. Region " Component Designer generated code "
   Public Sub New()
       MyBase.New()
       " This call is required by the Component Designer.
       InitializeComponent()
       " Add any initialization after the InitializeComponent() call
   End Sub
   "UserService overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   " The main entry point for the process
   <MTAThread()> _
   Shared Sub Main()
       Dim ServicesToRun() As System.ServiceProcess.ServiceBase
       " More than one NT Service may run within the same process. To add
       " another service to this process, change the following line to
       " create a second service object. For example,
       "
       "   ServicesToRun = New System.ServiceProcess.ServiceBase () {New Service1, New MySecondUserService}
       "
       ServicesToRun = New System.ServiceProcess.ServiceBase() {New Service1()}
       System.ServiceProcess.ServiceBase.Run(ServicesToRun)
   End Sub
   "Required by the Component Designer
   Private components As System.ruponentModel.IContainer
   " NOTE: The following procedure is required by the Component Designer
   " It can be modified using the Component Designer.  
   " Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       "
       "Service1
       "
       Me.CanPauseAndContinue = True
       Me.CanShutdown = True
       Me.ServiceName = "LogService"
   End Sub
  1. End Region
   Protected Overrides Sub OnStart(ByVal args() As String)
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "LogService"
           Log.WriteEntry("Service started at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnPause(ByVal args() As String)
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "LogService"
           Log.WriteEntry("Service paused at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnContinue(ByVal args() As String)
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "LogService"
           Log.WriteEntry("Service continued at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnShutdown(ByVal args() As String)
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "LogService"
           Log.WriteEntry("Service shutdown at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Overrides Sub OnStop()
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "LogService"
           Log.WriteEntry("Service stopped at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub

End Class</source>

Service timer

<source lang="vbnet">Imports System.Diagnostics Imports System.ServiceProcess Imports System.Timers Imports System.IO Public Class Service1

   Inherits System.ServiceProcess.ServiceBase
  1. Region " Component Designer generated code "
   Public Sub New()
       MyBase.New()
       " This call is required by the Component Designer.
       InitializeComponent()
       " Add any initialization after the InitializeComponent() call
   End Sub
   "UserService overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   " The main entry point for the process
   <MTAThread()> _
   Shared Sub Main()
       Dim ServicesToRun() As System.ServiceProcess.ServiceBase
       " More than one NT Service may run within the same process. To add
       " another service to this process, change the following line to
       " create a second service object. For example,
       "
       "   ServicesToRun = New System.ServiceProcess.ServiceBase () {New Service1, New MySecondUserService}
       "
       ServicesToRun = New System.ServiceProcess.ServiceBase () {New Service1}
       System.ServiceProcess.ServiceBase.Run(ServicesToRun)
   End Sub
   "Required by the Component Designer
   Private components As System.ruponentModel.IContainer
   " NOTE: The following procedure is required by the Component Designer
   " It can be modified using the Component Designer.  
   " Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       "
       "Service1
       "
       Me.CanPauseAndContinue = True
       Me.CanShutdown = True
       Me.ServiceName = "ServiceTimer"
   End Sub
  1. End Region
   Private WithEvents Alarm As Timer = New Timer(300000) " 5 minutes
   Public Sub OnTimedEvent(ByVal source As Object, ByVal e As ElapsedEventArgs) Handles Alarm.Elapsed
       Dim DirInfo As DirectoryInfo = New DirectoryInfo("C:\")
       Dim Log As New EventLog("Application")
       Log.Source = "ServiceTimer"
       Log.WriteEntry("Root files at " & Now() & " is " & _
                DirInfo.GetFiles("*.*").Length())
       Log.Close()
   End Sub
   Protected Overrides Sub OnStart(ByVal args() As String)
       Alarm.Enabled = True
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "ServiceTimer"
           Log.WriteEntry("Service started at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnPause(ByVal args() As String)
       Alarm.Enabled = False
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "ServiceTimer"
           Log.WriteEntry("Service paused at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnContinue(ByVal args() As String)
       Alarm.Enabled = True
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "ServiceTimer"
           Log.WriteEntry("Service continued at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnShutdown(ByVal args() As String)
       Alarm.Enabled = False
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "ServiceTimer"
           Log.WriteEntry("Service shutdown at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Overrides Sub OnStop()
       Alarm.Enabled = False
       Try
           Dim Log As New EventLog("Application")
           Log.Source = "ServiceTimer"
           Log.WriteEntry("Service stopped at " & DateTime.Now)
           Log.Close()
       Catch E As Exception
       End Try
   End Sub

End Class</source>

Your first service

<source lang="vbnet">Imports System.Diagnostics Imports System.ServiceProcess Imports System.IO Public Class Service1

   Inherits System.ServiceProcess.ServiceBase
  1. Region " Component Designer generated code "
   Public Sub New()
       MyBase.New()
       " This call is required by the Component Designer.
       InitializeComponent()
       " Add any initialization after the InitializeComponent() call
   End Sub
   "UserService overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   " The main entry point for the process
   <MTAThread()> _
   Shared Sub Main()
       Dim ServicesToRun() As System.ServiceProcess.ServiceBase
       " More than one NT Service may run within the same process. To add
       " another service to this process, change the following line to
       " create a second service object. For example,
       "
       "   ServicesToRun = New System.ServiceProcess.ServiceBase () {New Service1, New MySecondUserService}
       "
       ServicesToRun = New System.ServiceProcess.ServiceBase() {New Service1()}
       System.ServiceProcess.ServiceBase.Run(ServicesToRun)
   End Sub
   "Required by the Component Designer
   Private components As System.ruponentModel.IContainer
   " NOTE: The following procedure is required by the Component Designer
   " It can be modified using the Component Designer.  
   " Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       "
       "Service1
       "
       Me.CanPauseAndContinue = True
       Me.CanShutdown = True
       Me.ServiceName = "DemoService"
   End Sub
  1. End Region
   Private FileSt As StreamWriter
   Protected Overrides Sub OnStart(ByVal args() As String)
       Try
           FileSt = New StreamWriter("C:\DemoEvents.log", True)
           FileSt.WriteLine("Service started at " & DateTime.Now)
           FileSt.Flush()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnPause(ByVal args() As String)
       Try
           FileSt.WriteLine("Service paused at " & DateTime.Now)
           FileSt.Flush()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnContinue(ByVal args() As String)
       Try
           FileSt.WriteLine("Service continued at " & DateTime.Now)
           FileSt.Flush()
       Catch E As Exception
       End Try
   End Sub
   Protected Shadows Sub OnShutdown(ByVal args() As String)
       Try
           FileSt.WriteLine("Service shutdown at " & DateTime.Now)
           FileSt.Close()
       Catch E As Exception
       End Try
   End Sub
   Protected Overrides Sub OnStop()
       Try
           FileSt.WriteLine("Service stopped at " & DateTime.Now)
           FileSt.Close()
       Catch E As Exception
       End Try
   End Sub

End Class</source>