VB.Net Tutorial/Windows/Windows Service
Содержание
Backup service
<source lang="vbnet">Imports System.Diagnostics Imports System.ServiceProcess Imports System.IO Public Class Service1
Inherits System.ServiceProcess.ServiceBase
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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>