Question

我试图创建一个远程对象并获得错误，即使它看起来好像一切都井然有序，所以我决定直接从Microsoft（http://msdn.microsoft.com/）简化并运行一段代码示例EN-US /库/ system.marshalbyrefobject.aspx）。

当我运行此代码时，我在调用CreateInstanceAndUnwrap（）时得到一个TypeLoadException。但是，我只是在我的笔记本电脑上尝试过，它工作正常。任何人都有任何线索，为什么它可以在笔记本电脑上工作，但不是桌面？我刚刚在每个应用程序上创建了一个控制台应用程序并复制/粘贴了下面的代码，所以我不明白这两者之间会有什么不同。

using System;
using System.Reflection;

public class Worker : MarshalByRefObject
{
    public void PrintDomain() 
    { 
        Console.WriteLine("Object is executing in AppDomain \"{0}\"",
            AppDomain.CurrentDomain.FriendlyName); 
    }
}

class Example
{
    public static void Main()
    {
        // Create an ordinary instance in the current AppDomain
        Worker localWorker = new Worker();
        localWorker.PrintDomain();

        // Create a new application domain, create an instance 
        // of Worker in the application domain, and execute code 
        // there.
        AppDomain ad = AppDomain.CreateDomain("New domain");
        Worker remoteWorker = (Worker) ad.CreateInstanceAndUnwrap(
            Assembly.GetExecutingAssembly().FullName,
            "Worker");
        remoteWorker.PrintDomain();
    }
}

编辑：所以，我只是尝试使用本地域中的Activator创建该类型的实例，甚至这给了我一个错误，说它无法加载文件或程序集'System.RuntimeType'或其中一个依赖。看到这是.Net Framework的内部类型，即使我想，也无法让它部署，我现在非常困惑。

编辑：没有InnerException，但这里是Stack：

   at System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type)
   at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)
   at System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark)
   at System.Activator.CreateInstance(String assemblyName, String typeName)
   at System.AppDomain.CreateInstance(String assemblyName, String typeName)
   at System.AppDomain.CreateInstance(String assemblyName, String typeName)
   at ConsoleApplication1.Example.Main(String[] args) in D:\Projects\Remoting\ConsoleApplication1\Program.cs:line 28
   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

哦，例外是：

{"Could not load type 'Worker' from assembly 'ConsoleApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.":"Worker"}

另外，我尝试运行这行代码：

var w = Activator.CreateInstance(typeof(Worker).GetType().FullName, "Worker");

并得到一个FileNotFoundException：

Could not load file or assembly 'System.RuntimeType' or one of its dependencies.  The system cannot find the file specified.

Answer 1

在您的初始代码中，您尝试实例化一个不完整的类型名称，并且该代码不应该在任何地方工作，除非Worker没有名称空间。它应该是：

var workerType = typeof(Worker);
Worker remoteWorker = (Worker) ad.CreateInstanceAndUnwrap(
            // Where Worker is defined (probably the same as current assembly in you case)
            workerType.Assembly.FullName,
            // Worker's *fully-qualified* typename, including the namespace 
            workerType.FullName);

您的本地激活码错误地调用typeof(Worker).GetType().FullName而不是typeof(Worker).FullName。

typeof(Anything).GetType()将始终返回System.RuntimeType

为什么这个简单的远程处理示例适用于我的笔记本电脑而不是我的桌面？

1 个答案: