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Installer.BeforeRollback Event

Occurs before the installers in the Installers property are rolled back.

Namespace:  System.Configuration.Install
Assembly:  System.Configuration.Install (in System.Configuration.Install.dll)
public event InstallEventHandler BeforeRollback

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.


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 'BeforeRollback' event.
      this.BeforeRollback += new InstallEventHandler(MyInstaller_BeforeRollBack);
      // Attach the 'AfterRollback' event.
      this.AfterRollback += new InstallEventHandler(MyInstaller_AfterRollback);
   }
   // Event handler for 'BeforeRollback' event.
   private void MyInstaller_BeforeRollBack(object sender, InstallEventArgs e)
   {
      Console.WriteLine("");
      Console.WriteLine("BeforeRollback Event occured.");
      Console.WriteLine("");        
   }
   // Event handler for 'AfterRollback' event.
   private void MyInstaller_AfterRollback(object sender, InstallEventArgs e)
   {
      Console.WriteLine("");
      Console.WriteLine("AfterRollback Event occured.");
      Console.WriteLine("");        
   }
   // 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_BeforeRollback.exe ");      
   }
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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