4

I'm having a little trouble passing some data between two .NET appdomains and I'm hoping someone on here can help me.

Basically what I have is a main application (Main) which loads assembly A and B into it's main domain, then when I run a plugin(C) Main calls a create domain method on B which creates a new domain and loads C and a instance of B into it, so that C can only access B and not the others.

B contains a pointer to the IDispatch of Main but only it seems to get it after it is loaded into the new domain with C. What I am trying to do is send a copy of the pointer from the new domain instance of B and send it to A which is still running in the default domain.

Just for the record I control A,B and C but not Main

Sorry if this is a bit hard to understand I tried my best to explain it.

Code:

In A:

public class Tunnel : MarshalByRefObject
{
    public void SetPointer(int dispID)
    {
        IntPtr pointer = new IntPtr(dispID);
    }
}

In B:

//Call by Main after loading plug in but after A.dll is loaded.
public void CreateDomain()
{
  AppDomain maindomain= AppDomain.CurrentDomain;
  tunnel = (Tunnel)maindomain.CreateInstanceAndUnwrap(typeof(Tunnel).FullName,
                                                      typeof(Tunnel).FullName);

   AppDomain domain = base.CreateDomain(friendlyName, securityInfo, appDomainInfo);
   //Load assembly C (plug in) in domain.
   // C uses B so it loads a new instance of B into the domain also at the same time.

  // If I do this here it creates new instance of A but I need to use the one in
  // the main domain.
  //tunnel = (Tunnel)domain.CreateInstanceAndUnwrap(typeof(Tunnel).FullName,
                                                    typeof(Tunnel).FullName);
  tunnel.SetPointer(//Send data from B loaded in new domain.)

}

So at the end it looks something like this:

Default Domain:

  • Main.dll
  • A.dll
  • B.dll

Plug in Domain:

  • B.dll
  • C.dll
4

3 回答 3

8

在您上面的代码中，您正在调用

AppDomain.CurrentDomain.CreateInstanceAndUnwrap(...)

这只是在当前域中创建对象的一种迂回方式，就像您刚刚调用构造函数一样。您需要在远程域上调用该方法，即。

AppDomain domain = AppDomain.Create(...)
Tunnel tunnel = (Tunnel)domain.CreateInstanceAndUnwrap(...)

如果您随后调用将在远程对象上运行的 tunnel.SetPointer(...)。

于 2009-11-20T04:26:49.673 回答
0

所以我猜：

class B : MarshallByRef

这样，您只需在 A 类的域中创建对象：

AppDomain domain = ...
B inst = (B) domain.CreateInstanceAndUnwrap(typeof(B).Assembly.FullName, typeof(B).FullName);
inst.DoPlugin("C");

DoPlugin() 方法将动态加载类型“C”并调用任何合适的方法。

于 2009-11-19T23:57:36.840 回答
0

在创建“子”域（尤其是在单元测试库下运行）时，您可能必须跨搜索路径和证据进行复制：

var dom = AppDomain.CreateDomain("NewDomain",
    AppDomain.CurrentDomain.Evidence, AppDomain.CurrentDomain.BaseDirectory,
    AppDomain.CurrentDomain.RelativeSearchPath, false);
try
{
    var tunnel = (MyMarshallByRef)dom.CreateInstanceAndUnwrap(
        typeof(MyMarshallByRef).Assembly.FullName,
        typeof(MyMarshallByRef).FullName);

    tunnel.DoStuff("data");
}
finally
{
    AppDomain.Unload(dom);
}

另请注意，该DoStuff方法的任何参数以及它返回的任何类型都必须被标记[Serializable]

于 2014-02-28T10:43:16.783 回答