Question

主AppDomain有一些子AppDomain。在子AppDomain中可能是UnhandledException。如何在子AppDomain中通过UnhandledException卸载子AppDomain。

Answer 1

这可以通过try ... finally ...完成，而无需注册UnhandledException事件处理程序：

using System;
using System.Reflection;

interface IFoo
{
  void DoGood();
  void DoBad();
}

class Foo : MarshalByRefObject, IFoo
{
  public void DoGood() { Console.WriteLine("I'm good (" + AppDomain.CurrentDomain.FriendlyName + ")"); }
  public void DoBad() { throw new Exception("I'm bad (" + AppDomain.CurrentDomain.FriendlyName + ")"); }
}

class Program
{
  public static void Main()
  {
    try
    {
      AppDomain domain = AppDomain.CreateDomain("FooDomain");
      try
      {
        string assemblyName = Assembly.GetExecutingAssembly().FullName; // may be different assembly
        string typeName = "Foo";
        IFoo foo = (IFoo)domain.CreateInstanceAndUnwrap(assemblyName, typeName); 
        foo.DoGood();
        foo.DoBad();
      }
      finally
      {
        AppDomain.Unload(domain);
      }
    }
    catch (Exception e)
    {
      Console.WriteLine("Error: " + e.Message);
    }
  }
}

输出结果为：

I'm good (FooDomain)
Error: I'm bad (FooDomain)

如何通过UnhandledException卸载AppDomain

1 个答案: