如何为WebRuby中设置WebRequest.getResponseAsync的处理程序？

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 )

.

但具有以下错误：

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

.

upd

在

上

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

.

我收到这个错误：

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> 

.

并具有其他过载，但不是任务。

EG：

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可能让您跳过通用类型专业化，即非通用任务，这是您问题的完全键入版本：

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

.