我正在尝试了解 Castle 的 DynamicProxy,而我想做的是在运行时更改生成代理的目标。
像这样的东西...
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Castle.DynamicProxy;
namespace ConsoleApplication16
{
class Program
{
static void Main(string[] args)
{
IFoo foo = new Foo("Foo 1");
IFoo foo2 = new Foo("Foo 2");
foo.DoSomething("Hello!");
ProxyGenerator generator = new ProxyGenerator();
IFoo proxiedFoo = generator.CreateInterfaceProxyWithTarget<IFoo>(foo);
proxiedFoo.DoSomething("Hello proxied!");
(proxiedFoo as IChangeProxyTarget).ChangeProxyTarget(foo2); // cast results in null reference
proxiedFoo.DoSomething("Hello!");
}
}
}
我认为生成的代理会实现IChangeProxyTarget
,但对接口的强制转换会导致空引用。
如何在运行时更改生成的代理的目标?
更新如答案中所述,我尝试使用CreateInterfaceProxyWithTargetInterface
,但仍然无法转换为 IChangeProxyTarget 来更改目标。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Castle.DynamicProxy;
namespace ConsoleApplication16
{
class Program
{
static void Main(string[] args)
{
IFoo foo = new Foo("Foo 1");
IFoo foo2 = new Foo("Foo 2");
foo.DoSomething("Hello!");
ProxyGenerator generator = new ProxyGenerator();
IFoo proxiedFoo = generator.CreateInterfaceProxyWithTargetInterface<IFoo>(foo);
proxiedFoo.DoSomething("Hello proxied!");
IChangeProxyTarget changeProxyTarget = proxiedFoo as IChangeProxyTarget;
if (changeProxyTarget == null) // always null...
{
Console.WriteLine("Failed");
return;
}
changeProxyTarget.ChangeProxyTarget(foo2);
proxiedFoo.DoSomething("Hello!");
}
}
}