Question

所以我的问题围绕着保存记忆。

本质上，我需要将一个程序集加载到主/当前域以外的单独应用程序域中，检查该程序集中的类型，然后在完成后卸载新域。

目前我的解决方案如下：

AppDomain NewDomain = AppDomain.CreateDomain("newdomain");

foreach(string path in dllPaths) //string list of dll paths
{
    byte[] dllBytes = File.ReadAllBytes(dll);
    NewDomain.Load(dllBytes); //offending line
}

DoStuffWithNewDomain();
AppDomain.Unload(NewDomain);

NewDomain.Load行似乎将程序集加载到新域中，但也加载到程序的当前域中。

我使用此链接作为参考 - http://www.csharp411.com/how-to-load-a-net-assembly-into-a-separate-appdomain-so-you-can-unload-it/

非常感谢：）

Answer 1

如前所述，从字节加载程序集只能在当前应用程序域中进行。

以下是使用应用域http://msdn.microsoft.com/en-us/library/system.appdomain.docallback%28v=vs.110%29.aspx上的DoCallBack方法进行上下文切换以使目标应用域成为当前域的一种方法。

加载程序集后，您可以使用相同的方法检查新应用程序域的程序集和类型，并在卸载之前根据需要创建实例。

class Program
{
    static void Main(string[] args)
    {
        AppDomain newDomain = AppDomain.CreateDomain("NewDomain");
        List<string> dllPaths = new List<string>() { @"c:\dev\taglib-sharp.dll" };

        foreach (string dll in dllPaths)
        {
            AppDomainAsmLoader asmLoad = new AppDomainAsmLoader(File.ReadAllBytes(dll));
            newDomain.DoCallBack(new CrossAppDomainDelegate(asmLoad.LoadAsm));
        }

        newDomain.DoCallBack(new CrossAppDomainDelegate(DoWorkWithAppDomain));

        AppDomain.Unload(newDomain);
        Console.ReadKey();
    }

    public static void DoWorkWithAppDomain()
    {
        Assembly[] asms = AppDomain.CurrentDomain.GetAssemblies();
        foreach (Assembly asm in asms)
        {
            Type[] types = asm.GetTypes();
            foreach (Type type in types)
            {
                Console.WriteLine("Found the type: {0}", type.FullName);
            }
        }
    }

    [Serializable]
    public class AppDomainAsmLoader
    {
        private byte[] AsmData;  

        public AppDomainAsmLoader(byte[] data)
        {
            AsmData = data;
        }         

        public void LoadAsm()
        {
            Assembly asm = Assembly.Load(AsmData);
        }

    }
}

Answer 2

正如Erik建议的那样，您需要使用CreateInstanceAndWrap。这是我在VB中做的一个例子......

Private Function GetCoupler() As IBatchCoupler
        Dim CouplerProxy As IBatchCoupler = Nothing
        Try
            Dim DomainSetupInfo As AppDomainSetup = New AppDomainSetup()
            DomainSetupInfo.ConfigurationFile = Path.Combine(mFilePath, "web.config")
            DomainSetupInfo.ApplicationBase = Path.Combine(mFilePath, "bin")
            DomainSetupInfo.ShadowCopyFiles = "true"

Dim domain As AppDomain = AppDomain.CreateDomain("CoolDomain", AppDomain.CurrentDomain.Evidence, DomainSetupInfo)

            'Create remote object in new appDomain via the coupler interface
            'to avoid loading the design library into the calling application's primary appDomain
            CouplerProxy = domain.CreateInstanceFromAndUnwrap(Path.Combine(DomainSetupInfo.ApplicationBase, "Design.dll"), "BigApplication.Design.BatchCoupler")

        Catch ex As Exception

            ThisLogger.Error(ex)
        End Try
        Return CouplerProxy
    End Function

将程序集加载到新的应用程序域而不是CurrentDomain

2 个答案: