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Classe InstallEventArgs

Fornisce i dati per i seguenti eventi: BeforeInstall, AfterInstall, Committing, Committed, BeforeRollback, AfterRollback, BeforeUninstall, AfterUninstall.

Spazio dei nomi: System.Configuration.Install
Assembly: System.Configuration.Install (in system.configuration.install.dll)

public class InstallEventArgs : EventArgs
public class InstallEventArgs extends EventArgs
public class InstallEventArgs extends EventArgs

InstallEventArgs contiene un oggetto IDictionary che contiene a sua volta le informazioni relative allo stato corrente dell'installazione. I gestori eventi BeforeInstall, AfterInstall, Committing, Committed, BeforeRollback, AfterRollback, BeforeUninstall e AfterUninstall utilizzano queste informazioni.

Nell'esempio riportato di seguito vengono illustrati i costruttori InstallEventArgs e la proprietà SavedState della classe InstallEventArgs.

Sono presenti due nuovi eventi denominati BeforeCommit e AfterCommit. I gestori degli eventi vengono richiamati dai metodi protetti denominati rispettivamente OnBeforeCommit e OnAfterCommit. Gli eventi vengono generati quando si chiama il metodo Commit.


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

[RunInstaller(true)]
public class MyInstaller : Installer
{
   // Simple events to handle before and after commit handlers.
   public event InstallEventHandler BeforeCommit;
   public event InstallEventHandler AfterCommit;
   
   public MyInstaller()
   {
      // Add handlers to the events.
      BeforeCommit += new InstallEventHandler(BeforeCommitHandler);
      AfterCommit += new InstallEventHandler(AfterCommitHandler);
   }

   public override void Install(IDictionary savedState)
   {
      base.Install(savedState);
      Console.WriteLine("Install ...\n");
   }

   public override void Commit(IDictionary savedState)
   {
      Console.WriteLine("Before Committing ...\n");
      // Call the 'OnBeforeCommit' protected method.
      OnBeforeCommit(savedState);
      base.Commit(savedState);
      Console.WriteLine("Committing ...\n");
      // Call the 'OnAfterCommit' protected method.
      OnAfterCommit(savedState);
      Console.WriteLine("After Committing ...\n");
   }

   public override void Rollback(IDictionary savedState)
   {
      base.Rollback(savedState);
      Console.WriteLine("RollBack ...\n");
   }

   public override void Uninstall(IDictionary savedState)
   {
      base.Uninstall(savedState);
      Console.WriteLine("UnInstall ...\n");
   }
   
   // Protected method that invoke the handlers associated with the 'BeforeCommit' event.
   protected virtual void OnBeforeCommit(IDictionary savedState)
   {
      if(BeforeCommit != null)
         BeforeCommit(this, new InstallEventArgs(savedState)); 
   }

   // Protected method that invoke the handlers associated with the 'AfterCommit' event.
   protected virtual void OnAfterCommit(IDictionary savedState)
   {
      if(AfterCommit != null)
         AfterCommit(this, new InstallEventArgs());
   }

   // A simple event handler to exemplify the example.
   private void BeforeCommitHandler(Object sender, InstallEventArgs e)
   {
      Console.WriteLine("BeforeCommitHandler event handler has been called\n");
      Console.WriteLine("The count of saved state objects are : {0}\n",
         e.SavedState.Count);
   }

   // A simple event handler to exemplify the example.
   private void AfterCommitHandler(Object sender, InstallEventArgs e)
   {
      Console.WriteLine("AfterCommitHandler event handler has been called\n");
   }
}

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

/** @attribute RunInstaller(true)
 */
public class MyInstaller extends Installer
{
    // Simple events to handle before and after commit handlers.
    public InstallEventHandler beforeCommit = null;
    public InstallEventHandler afterCommit = null;


    /** @event 
     */
    public void add_beforeCommitHandler(InstallEventHandler p)
    {
        beforeCommit = 
            (InstallEventHandler)System.Delegate.Combine(beforeCommit, p);
    }

    /** @event 
     */
    public void remove_beforeCommitHandler(InstallEventHandler p)
    {
        beforeCommit = 
            (InstallEventHandler)System.Delegate.Remove(beforeCommit, p);
    }

    /** @event 
     */
    public void add_afterCommitHandler(InstallEventHandler p)
    {
        afterCommit = 
            (InstallEventHandler)System.Delegate.Combine(afterCommit, p);
    }

    /** @event 
     */
    public void remove_afterCommitHandler(InstallEventHandler p)
    {
        afterCommit = 
            (InstallEventHandler)System.Delegate.Remove(afterCommit, p);
    }

    public MyInstaller()
    {
        // Add handlers to the events.
        add_beforeCommitHandler(new InstallEventHandler(BeforeCommitHandler));
        add_afterCommitHandler(new InstallEventHandler(AfterCommitHandler));
    } //MyInstaller

    public void Install(IDictionary savedState)
    {
        super.Install(savedState);
        Console.WriteLine("Install ...\n");
    } //Install

    public void Commit(IDictionary savedState)
    {
        Console.WriteLine("Before Committing ...\n");

        // Call the 'OnBeforeCommit' protected method.
        OnBeforeCommit(savedState);
        super.Commit(savedState);
        Console.WriteLine("Committing ...\n");

        // Call the 'OnAfterCommit' protected method.
        OnAfterCommit(savedState);
        Console.WriteLine("After Committing ...\n");
    } //Commit

    public void Rollback(IDictionary savedState)
    {
        super.Rollback(savedState);
        Console.WriteLine("RollBack ...\n");
    } //Rollback

    public void Uninstall(IDictionary savedState)
    {
        super.Uninstall(savedState);
        Console.WriteLine("UnInstall ...\n");
    } //Uninstall

    // Protected method that invoke the handlers associated 
    // with the 'BeforeCommit' event.
    protected void OnBeforeCommit(IDictionary savedState)
    {
        if (beforeCommit != null) {
            beforeCommit.Invoke(this, new InstallEventArgs(savedState));
        }
    } //OnBeforeCommit

    // Protected method that invoke the handlers associated 
    // with the 'AfterCommit' event.
    protected void OnAfterCommit(IDictionary savedState)
    {
        if (afterCommit != null) {
            afterCommit.Invoke(this, new InstallEventArgs());
        }
    } //OnAfterCommit

    // A simple event handler to exemplify the example.
    private void BeforeCommitHandler(Object sender, InstallEventArgs e)
    {
        Console.WriteLine("BeforeCommitHandler event "
            +"handler has been called\n");
        Console.WriteLine("The count of saved state objects are : {0}\n",
            System.Convert.ToString(e.get_SavedState().get_Count()));
    } //BeforeCommitHandler

    // A simple event handler to exemplify the example.
    private void AfterCommitHandler(Object sender, InstallEventArgs e)
    {
        Console.WriteLine("AfterCommitHandler event handler has been called\n");
    } //AfterCommitHandler
} //MyInstaller

System.Object
   System.EventArgs
    System.Configuration.Install.InstallEventArgs

I membri statici pubblici (Shared in Visual Basic) di questo tipo sono validi per le operazioni multithreading. I membri di istanza non sono garantiti come thread safe.

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 non supporta tutte le versioni di ciascuna piattaforma. Per un elenco delle versioni supportate, vedere Requisiti di sistema.

.NET Framework

Supportato in: 2.0 1.1 1.0

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