Installer.AfterRollback 事件

在回滚 Installers 属性中所有安装程序的安装后发生。

**命名空间:**System.Configuration.Install
**程序集:**System.Configuration.Install（在 system.configuration.install.dll 中）

语法

声明
Public Event AfterRollback As InstallEventHandler
用法
Dim instance As Installer
Dim handler As InstallEventHandler

AddHandler instance.AfterRollback, handler

public event InstallEventHandler AfterRollback

public:
event InstallEventHandler^ AfterRollback {
    void add (InstallEventHandler^ value);
    void remove (InstallEventHandler^ value);
}

/** @event */
public void add_AfterRollback (InstallEventHandler value)

/** @event */
public void remove_AfterRollback (InstallEventHandler value)

JScript 支持使用事件，但不支持进行新的声明。

示例

下面的示例说明 AfterRollback 事件。它重写 Install 方法，并显式引发 ArgumentException，以便调用 Rollback 方法。当完成 Rollback 后，发生 AfterRollback 事件，并显示一则消息。

Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Configuration.Install

' Set 'RunInstaller' attribute to true.
<RunInstaller(True)>  _
Public Class MyInstallerClass
   Inherits Installer

   Public Sub New()
       MyBase.New() 
      ' Attach the 'AfterRollback' event.
      AddHandler Me.AfterRollback, AddressOf MyInstaller_AfterRollBack
   End Sub 'New

   ' Event handler for 'AfterRollback' event.
   Private Sub MyInstaller_AfterRollBack(sender As Object, e As InstallEventArgs)
      Console.WriteLine("")
      Console.WriteLine("AfterRollBack Event occured.")
      Console.WriteLine("")
   End Sub 'MyInstaller_AfterRollBack

   ' Override the 'Install' method.
   Public Overrides Sub Install(savedState As IDictionary)
      MyBase.Install(savedState)
      ' Explicitly throw an exception so that roll back is called.
      Throw New ArgumentException("Arg Exception")
   End Sub 'Install

   ' Override the 'Commit' method.
   Public Overrides Sub Commit(savedState As IDictionary)
      MyBase.Commit(savedState)
   End Sub 'Commit

   ' Override the 'Rollback' method.
   Public Overrides Sub Rollback(savedState As IDictionary)
      MyBase.Rollback(savedState)
   End Sub 'Rollback

   Public Shared Sub Main()
      Console.WriteLine("Usage : installutil.exe Installer_AfterRollback.exe ")
   End Sub 'Main

End Class 'MyInstallerClass

using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration.Install;

// Set 'RunInstaller' attribute to true.
[RunInstaller(true)]
public class MyInstallerClass: Installer
{

   public MyInstallerClass() :base()
   {
      // Attach the 'AfterRollback' event.
      this.AfterRollback += new InstallEventHandler(MyInstaller_AfterRollBack);
   }
   // Event handler for 'AfterRollback' event.
   private void MyInstaller_AfterRollBack(object sender, InstallEventArgs e)
   {
      Console.WriteLine("AfterRollBack Event occured.");
   }

   // Override the 'Install' method.
   public override void Install(IDictionary savedState)
   {
      base.Install(savedState);
      // Explicitly throw an exception so that roll back is called.
      throw new ArgumentException("Arg Exception");
   }
   // Override the 'Commit' method.
   public override void Commit(IDictionary savedState)
   {
      base.Commit(savedState);
   }
   // Override the 'Rollback' method.
   public override void Rollback(IDictionary savedState)
   {
      base.Rollback(savedState);
   }
   public static void Main()
   {
      Console.WriteLine("Usage : installutil.exe Installer_AfterRollback.exe ");
   }
}

#using <System.dll>
#using <System.Configuration.Install.dll>

using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::Configuration::Install;

// Set 'RunInstaller' attribute to true.

[RunInstaller(true)]
ref class MyInstallerClass: public Installer
{
private:

   // Event handler for 'AfterRollback' event.
   void MyInstaller_AfterRollBack( Object^ sender, InstallEventArgs^ e )
   {
      Console::WriteLine( "AfterRollBack Event occured." );
   }


public:
   MyInstallerClass()
   {
      
      // Attach the 'AfterRollback' event.
      this->AfterRollback += gcnew InstallEventHandler( this, &MyInstallerClass::MyInstaller_AfterRollBack );
   }


   // Override the 'Install' method.
   virtual void Install( IDictionary^ savedState ) override
   {
      Installer::Install( savedState );
      
      // Explicitly throw an exception so that roll back is called.
      throw gcnew ArgumentException( "Arg Exception" );
   }


   // Override the 'Commit' method.
   virtual void Commit( IDictionary^ savedState ) override
   {
      Installer::Commit( savedState );
   }


   // Override the 'Rollback' method.
   virtual void Rollback( IDictionary^ savedState ) override
   {
      Installer::Rollback( savedState );
   }

};

int main()
{
   Console::WriteLine( "Usage : installutil.exe Installer_AfterRollback.exe " );
}

import System.*;
import System.Collections.*;
import System.ComponentModel.*;
import System.Configuration.Install.*;

// Set 'RunInstaller' attribute to true.
/** @attribute RunInstaller(true)
 */
public class MyInstallerClass extends Installer
{
    public MyInstallerClass()
    {
        // Attach the 'AfterRollback' event.
        this.add_AfterRollback(
            new InstallEventHandler(MyInstaller_AfterRollBack));
    } //MyInstallerClass

    // Event handler for 'AfterRollback' event.
    private void MyInstaller_AfterRollBack(Object sender, InstallEventArgs e)
    {
        Console.WriteLine("AfterRollBack Event occured.");
    } //MyInstaller_AfterRollBack

    // Override the 'Install' method.
    public void Install(IDictionary savedState)
    {
        super.Install(savedState);

        // Explicitly throw an exception so that roll back is called.
        throw new ArgumentException("Arg Exception");
    } //Install

    // Override the 'Commit' method.
    public void Commit(IDictionary savedState)
    {
        super.Commit(savedState);
    } //Commit

    // Override the 'Rollback' method.
    public void Rollback(IDictionary savedState)
    {
        super.Rollback(savedState);
    } //Rollback

    public static void main(String[] args)
    {
        Console.WriteLine("Usage : installutil.exe"
            +" Installer_AfterRollback.exe ");
    } //main
} //MyInstallerClass

.NET Framework 安全性

• 对直接调用方的完全信任。此成员不能由部分信任的代码使用。有关更多信息，请参见。

平台

Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

Installer 类
Installer 成员
System.Configuration.Install 命名空间
BeforeRollback
OnAfterRollback
OnBeforeRollback