Installer.BeforeRollback Event
.NET Framework 2.0
Occurs before the installers in the Installers property are rolled back.
Namespace: System.Configuration.Install
Assembly: System.Configuration.Install (in system.configuration.install.dll)
Assembly: System.Configuration.Install (in system.configuration.install.dll)
'Declaration Public Event BeforeRollback As InstallEventHandler 'Usage Dim instance As Installer Dim handler As InstallEventHandler AddHandler instance.BeforeRollback, handler
/** @event */ public void add_BeforeRollback (InstallEventHandler value) /** @event */ public void remove_BeforeRollback (InstallEventHandler value)
JScript supports the use of events, but not the declaration of new ones.
The following example demonstrates the BeforeRollback event. It overrides the Install method and explicitly throws an ArgumentException so that the Rollback method is called. When the Rollback is complete, the BeforeRollback event occurs and a message is displayed.
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 'BeforeRollback' event. AddHandler Me.BeforeRollback, AddressOf MyInstaller_BeforeRollBack ' Attach the 'AfterRollback' event. AddHandler Me.AfterRollback, AddressOf MyInstaller_AfterRollback End Sub 'New ' Event handler for 'BeforeRollback' event. Private Sub MyInstaller_BeforeRollBack(sender As Object, e As InstallEventArgs) Console.WriteLine("") Console.WriteLine("BeforeRollback Event occured.") Console.WriteLine("") End Sub 'MyInstaller_BeforeRollBack ' 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_BeforeRollback.exe ") End Sub 'Main End Class 'MyInstallerClass
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 'BeforeRollback' event.
this.add_BeforeRollback(
new InstallEventHandler(MyInstaller_BeforeRollBack));
// Attach the 'AfterRollback' event.
this.add_AfterRollback(
new InstallEventHandler(MyInstaller_AfterRollback));
//MyInstallerClass
// Event handler for 'BeforeRollback' event.
private void MyInstaller_BeforeRollBack(Object sender, InstallEventArgs e)
{
Console.WriteLine("");
Console.WriteLine("BeforeRollback Event occured.");
Console.WriteLine("");
//MyInstaller_BeforeRollBack
// Event handler for 'AfterRollback' event.
private void MyInstaller_AfterRollback(Object sender, InstallEventArgs e)
{
Console.WriteLine("");
Console.WriteLine("AfterRollback Event occured.");
Console.WriteLine("");
//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_BeforeRollback.exe ");
//main
//MyInstallerClass
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
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
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