如何在 IronRuby 中为 WebRequest.GetResponseAsync 设置处理程序？

Question

我正在尝试：

request = WebRequest.Create( uri )
responseTask = request.GetResponseAsync
action = Action.new { process_request( sender, e ) }
task = Task.new( action )
responseTask.Wait( TimeSpan.new( -1 ) )
responseTask.ContinueWith( task )

但出现以下错误：

can't convert System::Threading::Tasks::Task into System::Action[System::Threading::Tasks::Task] (TypeError)  

UPD

开启

responseTask = request.GetResponseAsync  
action = Action[Task].new { process_request( sender, e ) }  
responseTask.Wait( TimeSpan.new( -1 ) )  
responseTask.ContinueWith( action )  

我收到此错误：

Found multiple methods for 'ContinueWith': ContinueWith(System::Action[System::Threading::Tasks::Task]), ContinueWith(System::Action[System::Threading::Tasks::Task[System::Net::WebResponse]]) (System::Reflection::AmbiguousMatchException)

Answer 1

ContinueWith 需要一个

Action<Task> 

还有其他重载，但不是针对任务。

例如：

action = Action.new {Console.WriteLine("action")}
task = Task.new( action )
action2 = Action[Task].new{Console.WriteLine("action2")}
task.ContinueWith(action2)
task.Start()
#prints "action" then "action2".

---

IronRuby 可能会让你跳过泛型类型特化 那是非泛型任务，这里是你的问题的完全类型化版本：

 action = Action[Task[WebResponse]].new { process_request( sender, e ) }