c# - 处理 AssemblyResolve 事件后仍然出现 FileNotFound 异常

Question

我已经处理了 AssemblyResolve 事件，但我仍然收到 FileNotFoundException。我已经在类型初始值设定项中订阅了事件，并在 Main 方法中调用了 Assembly.LoadFrom 方法:

class Program
{
    static Program()
    {
        AppDomain.CurrentDomain.AssemblyResolve+=new ResolveEventHandler(DeployAssemblyHandler);
    }

    static void Main(string[] args)
    {      
        try
        {
            System.Reflection.Assembly asm=Assembly.LoadFrom("AxInterop.SHDocVw.dll");            
        }
        catch(Exception)
        {
        }
    }

    public static System.Reflection.Assembly DeployAssemblyHandler(object sender,ResolveEventArgs args)
    {            
        Assembly asm = null;
        string asmName = new AssemblyName(args.Name).Name;

        string deployAssemblyDirPath = ""; // Common.AppUtil.InstallDir + AppUtil.DeployedAssemblyDir;

        string[] deployDirectories = Directory.GetDirectories(deployAssemblyDirPath);            

        foreach(string deploy in deployDirectories)
        {
            try
            {
                asm = Assembly.LoadFrom(deploy + "\\" + asmName);
                break;
            }
            catch (Exception ex) { }
        }                   
        return asm;
    }
}

Answer 1

我遇到了类似的问题并以使用新的 AppDomain 和(重要!)设置 PrivateBinPath 结束属性(property)。另一个 AppDomain 的好处是，如果您不再需要它，您可以卸载该程序集。 (我的)示例代码是:

  public class ProxyDomain : MarshalByRefObject
  {
      public bool TestAssembly(string assemblyPath)
      {
         Assembly testDLL = Assembly.LoadFile(assemblyPath);
         //do whatever you need 

         return true;
      }
   }

 AppDomainSetup ads = new AppDomainSetup();
 ads.PrivateBinPath = Path.GetDirectoryName("C:\\some.dll");
 AppDomain ad2 = AppDomain.CreateDomain("AD2", null, ads);
 ProxyDomain proxy = (ProxyDomain)ad2.CreateInstanceAndUnwrap(typeof(ProxyDomain).Assembly.FullName, typeof(ProxyDomain).FullName);
 bool isTdll = proxy.TestAssembly("C:\\some.dll");
 AppDomain.Unload(ad2);

编辑:根据您的评论，您只是在寻找错误的事件处理程序。在您的情况下，您应该使用 AppDomain.UnhandledException事件，因为 AssemblyResolve Event 有不同的用途。