Assembly Loading across AppDomains {2}

最新推荐文章于 2012-01-15 22:29:00 发布

转载最新推荐文章于 2012-01-15 22:29:00 发布 · 82 阅读

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/joe-yang/archive/2009/10/02/1577395.html

本文介绍了一种使用C#实现动态加载程序集到独立AppDomain的方法。通过创建新的AppDomain并加载特定程序集来隔离运行时环境，确保主程序不受影响。文章详细展示了如何配置AppDomain、复制必要的DLL文件，并通过接口实例调用远程方法。

Code
public class Manager {
        //private const string CONFIG_ASSEMBLY_POOL =FilePathConstant.APIGenerationDLLTemp;// @"C:\BlogProjects\AssemblyPool";
        private static readonly string privateBinPath;
        private const string CONFIG_DYNAMIC_ASSEMBLY_PROJECT = "DisconnectedWorker";
        private const string CONFIG_DYNAMIC_ASSEMBLY_FULLY_QUALIFIED_NAME = "DisconnectedWorker.Worker";

        private const string FORMAT_WORKER_DOMAIN_FRIENDLY_NAME = "Dynamic Worker Domain";


        static Manager() {
            privateBinPath = FilePathConstant.APIGenerationDLLTemp;
        }

        private void CopyThirdDllToCurrentDomainFolder() {
            FileHelper.CopyCurrentDomainDlls();
            FileHelper.CopyFeaturetteDLLSToTmpFolder(GameProjectHelper.GetGameProjectLocation());
            FileHelper.CopyCssToRunTimeFolder();
        }

        public void RunAppDomainWorker() {

            CopyThirdDllToCurrentDomainFolder();
            // create display name for appDomain
            string workerName = string.Format(FORMAT_WORKER_DOMAIN_FRIENDLY_NAME);

            // Construct and setup appDomain settings:
            AppDomainSetup ads = new AppDomainSetup();

            ads.ApplicationBase = FilePathConstant.CONFIG_ASSEMBLY_POOL;

            //属性值
            //类型：System..::.String
            //包含目录名称列表的 String，其中每个名称都用分号隔开。
            //专用程序集与应用程序部署在同一目录结构中。如果为 PrivateBinPath 指定的目录不在 ApplicationBase 下，它们将被忽略。
            ads.PrivateBinPath = privateBinPath;
            //ads.PrivateBinPathProbe = "将此属性设置为任何非空字符串可将应用程序的目录路径（即 ApplicationBase）从应用程序的搜索路径中排除，只搜索 PrivateBinPath。";
            ads.DisallowBindingRedirects = false;
            ads.DisallowCodeDownload = true;

            ads.ConfigurationFile = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;

            // Create domain
            AppDomain workerAppDomain = AppDomain.CreateDomain(workerName, null, ads);

            AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
            // do work on proxy
            IWorker workerInstance =
                (IWorker)
                workerAppDomain.CreateInstanceAndUnwrap(CONFIG_DYNAMIC_ASSEMBLY_PROJECT,
                                                        CONFIG_DYNAMIC_ASSEMBLY_FULLY_QUALIFIED_NAME);

            // Execute the task by invoking method on the interface instance
            //workerInstance.DoWork();
            //workerInstance.CopyThirdDllToCurrentDomainFolder();
            workerInstance.GenerateHtmlApi();
            workerInstance.GenerateMetaServerInterfaceXML();
            workerInstance.GenerateGameXML();

            // Unload worker appDomain
            AppDomain.Unload(workerAppDomain);

        }

        System.Reflection.Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args) {
            try {
                Assembly assembly = System.Reflection.Assembly.Load(args.Name);
                if (assembly != null)
                    return assembly;
            }
            catch { // ignore load error
            }

            // *** Try to load by filename - split out the filename of the full assembly name
            // *** and append the base path of the original assembly (ie. look in the same dir)
            // *** NOTE: this doesn't account for special search paths but then that never
            //           worked before either.
            string[] Parts = args.Name.Split(',');
            string File = FilePathConstant.CONFIG_ASSEMBLY_POOL + "\\" + Parts[0].Trim() + ".dll";

            return System.Reflection.Assembly.LoadFrom(File);

        }
    }

如果IWorker workerInstance =
                (IWorker)
                workerAppDomain.CreateInstanceAndUnwrap(CONFIG_DYNAMIC_ASSEMBLY_PROJECT,
                                                        CONFIG_DYNAMIC_ASSEMBLY_FULLY_QUALIFIED_NAME);
强制转换为IWorker失败，则引发事件ResolveEventHandler

转载于:https://www.cnblogs.com/joe-yang/archive/2009/10/02/1577395.html