不触发依赖项的AssemblyResolve

Question

我现在正与AssenblyResolve事件斗争一段时间。我搜索过堆栈溢出，做了其他谷歌搜索，并尝试了所有我认为相关的内容。下面的链接更接近我的问题(在我看来)：

1. AssemblyResolve is not invoked and FileNotFoundException is thrown during serialization
2. Where to handle AssemblyResolve event in a class library?

我有一个带有to静态方法的Bootstrapper类(为了清楚起见，我将删除我们拥有的线程安全代码：

public static void Initialize()
{
    AppDomain.CurrentDomain.AssemblyResolve += CustomResolve;
}

private static Assembly CustomResolve(object sender, ResolveEventArgs args)
{
    // There is a lot code here but basicall what it does.
    // Is determining which architecture the computer is running on and
    // extract the correct embedded dll (x86 or x64). The code was based
    // on milang on GitHub (https://github.com/milang/P4.net). And it's the same
    // purpose we want to be able to load the x86 or x64 version of the perforce dll
    // but this time with the officially Perforce supported p4api.net.
    // Once the dll is extracted we assign it to the boostrapper
    Bootstrapper._p4dnAssembly = Assembly.LoadFile(targetFileName);

    // Make sure we can satisfy the requested reference with the embedded assembly (now extracted).
    AssemblyName reference = new AssemblyName(args.Name);
    if (AssemblyName.ReferenceMatchesDefinition(reference, Bootstrapper._p4dnAssembly.GetName()))
    {
        return Bootstrapper._p4dnAssembly;
    }
}

如果I有一个带有main方法和静态构造函数的简单类，我就能够使代码工作。静态构造函数只是调用Boostrapper.Initialize()方法。在此之后，我可以使用我的库，它可以正常工作：

public static class Test
{
    static Test()
    {
        Bootstrapper.Initialize();
    }

    public static void Main()
    {
         // Using the library here is working fine. The AssemblyResolve event was
         // fired (confirmed by a breakpoint in Visual Studio)
    }
}

我的问题是，如果至少有一层依赖。基本上，代码保持不变，但这次我的库代码在另一个库中：

public static class Test
{
    static Test()
    {
        Bootstrapper.Initialize();
    }

    public static void Main()
    {
        Class1 myClass = new Class1();

        // The following line is using the code of the extracted library, but
        // The AssemblyResolve event is not fired (or fired before I register the  
        // callback) and therefore the library is not found : result  
        // BadImageFormatException() error could not load libary because one
        myClass.Connect();
    }
}

听起来像是我之前说过的第二种链接，解释我看到的内容，但它不起作用。AssemblyResove回调的Visual断点从未被击中。

知道怎么回事吗？

弗朗西斯

Answer 1

有人回答了，但答案被删除了。所以我不能按答案做标记。基本上，代码不需要在"main“方法之外的事实是有效的。从一个新项目开始，解决这个问题，所以我想我的dll可能有一些问题(可能是x86 dll在x64文件夹中，或者反之亦然)。

static void main(string[] args)
{
    Boostrapper.Initialize();
    RealMain();
}

static void RealMain()
{
    Class1 myClass = new Class1();
    myClass.Connect();
}

Answer 2

我知道这个问题已经有一段时间没有被提出和回答了，但我还是想补充一下我对这个问题的看法(因为我只是在这个问题上浪费了几个小时，也许多亏了这个问题，其他人就不必这么做了)

问题主要在于，应用程序试图解决在该方法开始时执行该方法所需的所有程序集：

static void main(string[] args)
{
    // <-- here the app tries to resolve MyAssembly
    // and as MyAssembly.Class1 is not found, the app crashes

    // this next line is never called:
    AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(ResolveAssembly);

    // class contained in an assemnly that we need to resolve
    MyAssembly.Class1 myClass = new MyAssembly.Class1();
}

这就是为什么上面的事件处理程序会崩溃: ResolveAssembly事件处理程序将永远不会被调用，因为它从未连接过。

这也是为什么下面的解决方案起作用(正如OP发布的那样)：

static void main(string[] args)
{
    Initialize();
    RealMain();
}

static void Initialize()
{
    AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(ResolveAssembly);
}

static void RealMain()
{
   // <-- here the app tries to resolve MyAssembly
   // class contained in an assemnly that we need to resolve      
   MyAssembly.Class1 myClass = new MyAssembly.Class1();
   // and everything is OK
}