Installer.BeforeRollback Evento

Definizione

Spazio dei nomi:

System.Configuration.Install

Assembly:

System.Configuration.Install.dll

Si verifica prima del rollback dei programmi di installazione contenuti nella proprietà Installers.

C#

public event System.Configuration.Install.InstallEventHandler BeforeRollback;

Tipo evento

InstallEventHandler

Esempio

Nell'esempio seguente viene illustrato l'evento BeforeRollback . Esegue l'override del Install metodo e genera in modo esplicito un oggetto ArgumentException in modo che venga chiamato il Rollback metodo . Al termine, l'evento RollbackBeforeRollback si verifica e viene visualizzato un messaggio.

C#

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 occurred.");
      Console.WriteLine("");
   }
   // Event handler for 'AfterRollback' event.
   private void MyInstaller_AfterRollback(object sender, InstallEventArgs e)
   {
      Console.WriteLine("");
      Console.WriteLine("AfterRollback Event occurred.");
      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 ");
   }
}

Si applica a

Vedi anche

• AfterRollback
• OnAfterRollback(IDictionary)
• OnBeforeRollback(IDictionary)