3

我试图创建一个远程对象并得到错误，即使看起来一切都井井有条，所以我决定简化并直接从 Microsoft 运行一段示例代码 (http://msdn.microsoft.com/en-us /library/system.marshalbyrefobject.aspx)。

当我运行此代码时，当它调用 CreateInstanceAndUnwrap() 时，我得到一个 TypeLoadException。但是，我只是在我的笔记本电脑上尝试过，它运行良好。任何人都知道为什么它可以在笔记本电脑上工作而不是台式机？我刚刚在每个上创建了一个控制台应用程序并复制/粘贴了下面的代码，所以我不明白两者之间有什么不同。

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，我只是尝试在本地域中使用 Activator 创建类型的实例，甚至这给了我一个错误，说它无法加载文件或程序集“System.RuntimeType”或其依赖项之一。看到这是 .Net Framework 的内部类型，即使我愿意，我也无法阻止它部署，我现在很困惑。

编辑：没有 InnerException，但这里是堆栈：

   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，例外情况如下：

{"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.
4

1 回答 1

8

在您的初始代码中，您试图实例化一个不完整的类型名，除非 Worker 没有命名空间，否则该代码不应在任何地方工作。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()总会回来的System.RuntimeType

于 2013-01-19T13:05:52.617 回答