Question

我试图制作一个流程.Net DLL;使用sample代码，我能够创建一个进程外COM DLL。但是，我在实施事件处理时遇到了一些问题。

根据代码，组件公开以下事件：

Public Event FloatPropertyChanging(ByVal NewValue As Single, ByRef Cancel As Boolean)

在VB.Net Form应用程序中处理该事件会引发异常。以下是详细信息：

Dim tempObj As New VBServicedComponent.SimpleObject()

AddHandler tempObj.FloatPropertyChanging, AddressOf FloatPropertyChangingEventHandler // **Throws Exception!!!**
tempObj.FloatProperty = 4

例外详细信息：

System.Reflection.TargetInvocationException:-
Exception has been thrown by the target of an invocation

堆栈追踪：

at System.RuntimeMethodHandle.SerializationInvoke（IRuntimeMethodInfo方法，Object target，SerializationInfo info，StreamingContext＆amp; context）在System.Runtime.Serialization.ObjectManager.CompleteISerializableObject（Object obj，SerializationInfo info，StreamingContext context）在System.Runtime.Serialization.ObjectManager.FixupSpecialObject（ObjectHolder holder）在System.Runtime.Serialization.ObjectManager.DoFixups（）在System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize（HeaderHandler handler，__BinaryParser serParser，Boolean fCheck，Boolean isCrossAppDomain，IMethodCallMessage methodCallMessage）在System.EnterpriseServices.ComponentSerializer.UnmarshalFromBuffer（Byte [] b，Object tp）在System.EnterpriseServices.ComponentServices.ConvertToMessage（String s，Object tp）在System.EnterpriseServices.ServicedComponent.RemoteDispatchHelper（String s，Boolean＆amp; failed）在System.EnterpriseServices.ServicedComponent.System.EnterpriseServices.IRemoteDispatch.RemoteDispatchNotAutoDone（String s）在System.EnterpriseServices.IRemoteDispatch.RemoteDispatchNotAutoDone（String s）在System.EnterpriseServices.RemoteServicedComponentProxy.Invoke（IMessage reqMsg）在System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke（MessageData＆amp; msgData，Int32 type）在VBServicedComponent.SimpleObject.add_FloatPropertyChanging（FloatPropertyChangingEventHandler obj）在D：\ Meridia \ MeridiaAPI \ COMPlusServices \ TestApp \ Module1.vb中的TestApp.modMain.Main（）：第34行

内部例外：

Could not load file or assembly 'TestApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.":"TestApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

堆栈追踪：

at System.Reflection.RuntimeAssembly._nLoad（AssemblyName fileName，String codeBase，Evidence assemblySecurity，RuntimeAssembly locationHint，StackCrawlMark＆amp; stackMark，IntPtr pPrivHostBinder，Boolean throwOnFileNotFound，Boolean forIntrospection，Boolean suppressSecurityChecks）在System.Reflection.RuntimeAssembly.InternalLoadAssemblyName（AssemblyName assemblyRef，Evidence assemblySecurity，RuntimeAssembly reqAssembly，StackCrawlMark＆amp; stackMark，IntPtr pPrivHostBinder，Boolean throwOnFileNotFound，Boolean forIntrospection，Boolean suppressSecurityChecks）在System.Reflection.RuntimeAssembly.InternalLoad（String assemblyString，Evidence assemblySecurity，StackCrawlMark＆amp; stackMark，IntPtr pPrivHostBinder，Boolean forIntrospection）在System.Reflection.RuntimeAssembly.InternalLoad（String assemblyString，Evidence assemblySecurity，StackCrawlMark＆amp; stackMark，Boolean forIntrospection）在System.Reflection.Assembly.Load（String assemblyString） at System.Runtime.Serialization.FormatterServices.LoadAssemblyFromString（String assemblyName）在System.Reflection.MemberInfoSerializationHolder..ctor（SerializationInfo info，StreamingContext context）

在处理事件时，TestApp结束时是否有任何遗漏？如果是，那么处理此类事件的正确方法是什么？

提前致谢。

带事件处理的.Net服务组件

0 个答案: