为默认 AppDomain 设置卷影复制的正确方法是什么 [英] What is the right way to set shadow copying for the default AppDomain

问题描述

关于我可以让默认的 AppDomain 使用某些程序集的卷影副本吗?，它描述了一个有效的激活解决方案在特定目录的默认 AppDomain 中进行卷影复制.

Relating to Can I make the default AppDomain use shadow copies of certain assemblies?, it describes a working solution to activate shadow copying within the default AppDomain for a specific directory.

基本上它说使用这些简单的方法:

Basically it says to use these simple methods:

AppDomain.CurrentDomain.SetShadowCopyPath(aDirectory);
AppDomain.CurrentDomain.SetShadowCopyFiles();

但是因为这里使用的方法被标记为过时，我想知道现在完成相同任务的正确方法是什么.警告消息提示:

But because the methods used here are marked as obsolete I was wondering what is now the correct way to accomplish the same. The warning message hints to:

请调查 AppDomainSetup.ShadowCopyDirectories 的使用情况

Please investigate the use of AppDomainSetup.ShadowCopyDirectories instead

AppDomain 有一个名为 SetupInformation 的这种类型的成员，它可能会带您进入这个简单的实现

An AppDomain has a member of this type called SetupInformation which might bring you to this straightforward implementation

AppDomain.CurrentDomain.SetupInformation.ShadowCopyDirectories = aDirectory;
AppDomain.CurrentDomain.SetupInformation.ShadowCopyFiles = "true";

不幸的是，这没有效果.那么问题来了，有没有办法改变当前appdomain的AppDomainSetup来激活卷影复制?

Unfortunately this has no effect. So the question is, is there a way to alter the AppDomainSetup of the current appdomain to activate shadow copying ?

推荐答案

据我所知，这些方法仅适用于 .NET Framework 1.1 版.对于所有更高版本，您无法在主 AppDomain 上启用卷影复制.您需要创建一个新的 AppDomain 并进行适当的设置.一个简单的方法是创建一个加载器应用程序，只需:

As far as I know these methods only work on .NET Framework version 1.1. For all later versions you cannot enable shadow-copying on the main AppDomain. You need to create a new AppDomain and set-it up appropriately. A simple approach is to create a loader application that simply:

• 创建一个启用了卷影复制的新 AppDomain.为此，您必须使用 AppDomain.CreateDomain 的重载之一采用 AppDomainSetup 参数.
• 使用AppDomain.ExecuteAssembly<执行您的主应用程序/a> 方法.

• Creates a new AppDomain with shadow-copy enabled. For this you will have to use one of the overloads of AppDomain.CreateDomain that take an AppDomainSetup parameter.
• Executes your main application using the AppDomain.ExecuteAssembly method.

可以在 应用程序的影子复制 CodeProject 文章中找到一个好的起点.以下程序取自文章，稍作修改(未指定缓存路径:

A good starting point can be found in the Shadow Copying of Applications CodeProject article. The following program is taken from the article with a slight modification (the cache path is not specified:

using System;
using System.IO;

namespace Loader
{
    static class Program
    {
        [LoaderOptimization(LoaderOptimization.MultiDomainHost)]
        [STAThread]
        static void Main()
        {
            /* Enable shadow copying */

            // Get the startup path. Both assemblies (Loader and
            // MyApplication) reside in the same directory:
            string startupPath = Path.GetDirectoryName(
                System.Reflection.Assembly
                .GetExecutingAssembly().Location);

            string configFile = Path.Combine(
                startupPath,
                "MyApplication.exe.config");
            string assembly = Path.Combine(
                startupPath,
                "MyApplication.exe");

            // Create the setup for the new domain:
            AppDomainSetup setup = new AppDomainSetup();
            setup.ApplicationName = "MyApplication";
            setup.ShadowCopyFiles = "true"; // note: it isn't a bool
            setup.ConfigurationFile = configFile;

            // Create the application domain. The evidence of this
            // running assembly is used for the new domain:
            AppDomain domain = AppDomain.CreateDomain(
                "MyApplication",
                AppDomain.CurrentDomain.Evidence,
                setup);

            // Start MyApplication by executing the assembly:
            domain.ExecuteAssembly(assembly);

            // After the MyApplication has finished clean up:
            AppDomain.Unload(domain);
        }
    }
}

你必须:

• 将 MyApplication.exe 替换为可执行程序集的名称.
• 将 MyApplication 替换为应用程序名称.
• 将 MyApplication.exe.config 替换为您的应用程序配置文件的名称.如果您没有，则无需设置.

• Replace MyApplication.exe with the name of your executable assembly.
• Replace MyApplication with the name of apllication.
• Replace MyApplication.exe.config with the name of you application's configuration file. If you do not have one then you do not need to set this.

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