C# 无法从自定义域中打开COM实例
我正在尝试从自定义域在COM组件内部进行调用。 问题是,当我尝试打开ObjectHandle时,会抛出序列化异常 但是如果我使用当前的AppDomain创建实例,它会工作 异常消息:C# 无法从自定义域中打开COM实例,c#,.net,com,appdomain,C#,.net,Com,Appdomain,我正在尝试从自定义域在COM组件内部进行调用。 问题是,当我尝试打开ObjectHandle时,会抛出序列化异常 但是如果我使用当前的AppDomain创建实例,它会工作 异常消息: An unhandled exception of type 'System.Runtime.Serialization.SerializationException' occurred in ConsoleApp1.exe Additional information: Type 'MyAddin.Main' i
An unhandled exception of type 'System.Runtime.Serialization.SerializationException' occurred in ConsoleApp1.exe
Additional information: Type 'MyAddin.Main' in assembly 'MyAddin, Version=2019.0.1.5, Culture=neutral, PublicKeyToken=null' is not marked as serializable.
我的代码是:
using System;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
string addinPath = "C:\\sources\\MyAddin\\bin\\x64\\Debug\\MyAddin.dll";
string addinFolder = "C:\\sources\\MyAddin\\bin\\x64\\Debug\\";
string addinConfigPath = "C:\\sources\\MyAddin\\bin\\x64\\Debug\\MyAddin.dll.config";
System.AppDomainSetup setup = new System.AppDomainSetup();
setup.ApplicationBase = addinFolder;
setup.ConfigurationFile = addinConfigPath;
setup.ApplicationName = "MyAddin.dll";
string strClsid = "{2616ad89-f4d1-4dc7-9d9d-a5de101b9085}"; // CLSID of my COM addin
System.AppDomain customDomain = System.AppDomain.CreateDomain(strClsid, null, setup);
// The type of domain is System.Runtime.Remoting.Proxies.__TransparentProxy}
// The type of custom domain is
System.Type addinComType = System.Type.GetTypeFromCLSID(System.Guid.Parse(strClsid));
System.Runtime.Remoting.ObjectHandle addinInstanceObjectHandle = customDomain.CreateComInstanceFrom(addinPath, addinComType.FullName);
System.Object addinInstance = addinInstanceObjectHandle.Unwrap(); //Throw the Serialization exception when create COM instance from customDomain
// But working if I did System.AppDomain.CurrentDomain.CreateComInstanceFrom
System.Reflection.MethodBase myMethod = addinInstance.GetType().GetMethod("connectToEwAPI");
System.Object[] parameters = { null };
myMethod.Invoke(addinInstance, parameters);
}
}
}
所以我做了些蠢事?
你知道我错过了什么吗
提前谢谢你的帮助
编辑 我尝试了更基本的组装。 因此,我有一个C#程序集,只包含以下代码
namespace ClassLibrary2
{
public class Class1
{
public Class1()
{
}
public string MyMethod() => "OK";
}
}
我的exe代码只是
static void Main(string[] args)
{
string basePath = @"C:\source\MyAddin\ConsoleApp1\ClassLibrary2\bin\Debug";
string dllName = @"ClassLibrary2";
string typeName = "ClassLibrary2.Class1";
string dllFullpath = $"{basePath}\\{dllName}.dll";
try
{
ObjectHandle objectHandle = AppDomain.CurrentDomain.CreateInstanceFrom(dllFullpath, typeName);
Object addinObject = objectHandle.Unwrap();
var myAddinMethod = addinObject.GetType().GetMethod("MyMethod");
string result = myAddinMethod.Invoke(addinObject, null) as string; // Working
AppDomainSetup setup = new AppDomainSetup()
{
ApplicationBase = basePath,
ApplicationName = dllName,
ConfigurationFile = dllName + ".dll.config",
PrivateBinPath = basePath
};
AppDomain customDomain = AppDomain.CreateDomain("MyDomain", null, setup);
ObjectHandle objectHandleFromCustomDomain = customDomain.CreateInstanceFrom(dllFullpath, typeName);
Object addinObjectFromCustomDomain = objectHandleFromCustomDomain.Unwrap(); // Exception thrown
var myAddinMethodFromCustomDomain = addinObjectFromCustomDomain.GetType().GetMethod("MyMethod");
string resultFromCustomDomain = myAddinMethodFromCustomDomain.Invoke(myAddinMethodFromCustomDomain, null) as string;
}
catch(Exception e)
{
var t = e.Message; // Exception thrown: 'System.Runtime.Serialization.SerializationException' by objectHandleFromCustomDomain.Unwrap()
}
}
如您所见,它使用的是默认域,而不是自定义域
你有什么想法吗?如果你想跨
AppDomain
边界访问对象,你需要做两件事之一:
- 使类可序列化,例如通过添加
属性。在这种情况下,对象的副本被序列化并通过[Serializable]
边界传递。您调用的任何membe都将位于副本上,并且不会影响原始对象AppDomain
- 使类派生自。在这种情况下,对对象的引用将跨AppDomain边界封送,您调用的任何成员都将影响其原始AppDomain中的对象
…因为我已经从COM接口派生了
-为什么不?不能从>1个基类派生,但可以从任意多个接口派生。您的示例类class
不是从任何东西派生出来的;您是否尝试将此派生自MarshalByRefObject
?对不起,我弄错了,我完全理解您所说的。因此,我尝试了[Serializable]
和MarshallByRefObject
,但仍然存在相同的序列化异常…````[ComVisible(true)][Guid(“16c8ab2e-04b2-456-ade1-f4f69c213393”)[Serializable]公共类Class1:MarshalByRefObject,MyAPI.IAddIn{````@David,您的类应该继承自MarshalByRefObject,或者可以序列化(这意味着它将按值进行封送),但不是两者都有。在您的情况下,MarshallByRefObject
是合适的。在这种情况下,确切的异常消息是什么?消息仍然是相同的System.Runtime.Serialization.SerializationException:在程序集“ClassLibrary2,Version=1.0.0,Culture=neutral,PublicKeyToken=null”中键入“ClassLibrary2.Class1”alizable.a System.Runtime.Remoting.ObjectHandle.Unwrap()a ConsoleApp1.Program.Main(字符串[]args)dans C:\ConsoleApp1\ConsoleApp1\Program.cs:ligne 39