我正在与AssenblyResolve活动一段时间.我搜索了stackoverflow,并进行了其他谷歌搜索,并尝试所有我认为是相关的.这里的链接越接近我的问题(在我看来)：
> AssemblyResolve is not invoked and FileNotFoundException is thrown during serialization
> Where to handle AssemblyResolve event in a class library?
我有一个Bootstrapper类与静态方法(我将删除我们拥有的线程安全代码,只是为了清楚起见：
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;
}
}
我能够使代码工作,如果我有一个简单的类与一个主要的方法和静态构造函数.静态构造函数只是调用Boostrapper.Initialize()方法.
之后,我可以使用我的图书馆,它按预期工作：
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)
}
}
我遇到的问题是如果至少有一层依赖关系.基本上代码保持不变,但这次我的库的代码在另一个库中：
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();
}
}
听起来像我之前说过的链接的第2条说明了我所看到的东西,但它不起作用. AssemblyResove回调中的Visual Studio断点永远不会被击中.
任何想法发生了什么？
弗朗西斯
解决方法
我知道已经有一段时间了,因为这个问题被提出和回答,但是我想补充一下我的想法(因为我只是浪费了几个小时,也许感谢这个别人不必)
问题基本上是这样一个事实：应用程序正在尝试解决在该方法开始时执行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();
}
这就是为什么上面会崩溃的：ResolveAssembly事件处理程序永远不会被调用,因为它从来没有被挂接.
这也是为什么下面的解决方案工作(由OP发布)：
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
}
