Installer.BeforeInstall 事件

在安装程序集合中每个安装程序的 Install 方法运行前发生。

**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 BeforeInstall As InstallEventHandler
用法
Dim instance As Installer
Dim handler As InstallEventHandler

AddHandler instance.BeforeInstall, handler

public event InstallEventHandler BeforeInstall

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

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

/** @event */
public void remove_BeforeInstall (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 BeforeInstall 事件。它由 OnBeforeInstall 方法引发。

' MyInstaller is derived from the class 'Installer'.
Sub New()
   MyBase.New()
   AddHandler BeforeInstall, AddressOf BeforeInstallEventHandler
End Sub 'New

Private Sub BeforeInstallEventHandler(sender As Object, e As InstallEventArgs)
   ' Add steps to perform any actions before the install process.
   Console.WriteLine("Code for BeforeInstallEventHandler")
End Sub 'BeforeInstallEventHandler

// MyInstaller is derived from the class 'Installer'.
MyInstaller() : base()
{
   BeforeInstall += new InstallEventHandler(BeforeInstallEventHandler);
}
private void BeforeInstallEventHandler(object sender, InstallEventArgs e)
{
   // Add steps to perform any actions before the install process.
   Console.WriteLine("Code for BeforeInstallEventHandler"); 
}

   // MyInstaller is derived from the class 'Installer'.
private:
   MyInstaller()
   {
      BeforeInstall += gcnew InstallEventHandler( this, &MyInstaller::BeforeInstallEventHandler );
   }

   void BeforeInstallEventHandler( Object^ sender, InstallEventArgs^ e )
   {
      // Add steps to perform any actions before the install process.
      Console::WriteLine( "Code for BeforeInstallEventHandler" );
   }

// MyInstaller is derived from the class 'Installer'.
MyInstaller()
{
    this.add_BeforeInstall(
        new InstallEventHandler(BeforeInstallEventHandler));
} //MyInstaller

private void BeforeInstallEventHandler(Object sender, InstallEventArgs e)
{
    // Add steps to perform any actions before the install process.
    Console.WriteLine("Code for BeforeInstallEventHandler");
} //BeforeInstallEventHandler

.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
Installer.AfterInstall 事件
OnAfterInstall
OnBeforeInstall