我想从C ++ / CLI加载两个程序集;程序集A取决于程序集B,两者都是VB.Net项目(3.5)。我希望它们从一个字节数组加载,所以我使用Assembly :: Load(),但是当我尝试从程序集A实例化一个类时,框架忽略了先前加载的程序集B并尝试再次加载它,这会失败,因为它不在搜索路径中。程序集的“名称”是相同的,所以我不知道它为什么会失败。出于测试目的,我的程序直接从编译的图像加载字节,但实际代码将以不同方式加载。这是我的测试代码:
#include "stdafx.h"
using namespace System;
using namespace System::Windows::Forms;
using namespace System::IO;
using namespace System::Reflection;
[STAThreadAttribute]
int main(array<System::String ^> ^args)
{
array<unsigned char>^ bytes;
FileStream^ f;
f = gcnew FileStream(L"c:\\...\\AssemblyB.dll", FileMode::Open);
bytes = gcnew array<unsigned char>((int)f->Length);
f->Read( bytes, 0, (int) f->Length );
f->Close();
f = nullptr;
Assembly^ assemblyb = Assembly::Load(bytes);
f = gcnew FileStream(L"c:\\...\\AssemblyA.dll", FileMode::Open);
bytes = gcnew array<unsigned char>((int)f->Length);
f->Read( bytes, 0, (int) f->Length );
f->Close();
f = nullptr;
Assembly^ assemblya = Assembly::Load(bytes);
bytes = nullptr;
// Here I get the file not found exception!
Object^ mf = assemblya->CreateInstance(L"AssemblyA.MainForm");
// This line is not reached unless I copy assemblyb.dll to my app's folder:
mf->GetType()->InvokeMember(L"ShowDialog",BindingFlags::Default | BindingFlags::InvokeMethod,
mf->GetType()->DefaultBinder, mf, nullptr );
return 0;
}
错误是:
无法加载文件或程序集“ AssemblyB,Version = 1.0.3650.39903,Culture = neutral,PublicKeyToken = null ”或其中一个依赖项。系统找不到指定的文件。
当我检查assemblyb-&gt; FullName时,它确切地说' AssemblyB,Version = 1.0.3650.39903,Culture = neutral,PublicKeyToken = null '。
当然,如果我将AssemblyB.dll复制到我的测试程序的文件夹中,代码就可以了,但这不是我想要的。
有什么想法吗?
(顺便说一句,我的第二步将尝试使AssemblyA使用我的C ++ / CLI exe将公开的类。)
答案 0 :(得分:6)
// This class is just for holding a managed static variable for assemblyB
ref class Resolver {
public:
static Assembly^ assemblyB;
};
// This is the delegate for resolving assemblies
Assembly^ ResolveHandler(Object^ Sender, ResolveEventArgs^ args)
{
// Warning: this should check the args for the assembly name!
return Resolver::assemblyB;
}
.
.
.
[STAThreadAttribute]
int main(array<System::String ^> ^args)
{
// Set up the handler for the AssemblyResolve event
AppDomain::CurrentDomain->AssemblyResolve += gcnew ResolveEventHandler( ResolveHandler );
.
.
.
// Load assemblyb into the static variable available to the resolver delegate
Resolver::assemblyb = Assembly::Load(bytes);
.
.
.
我希望有人觉得这很有用。 :)