Question

我在名为TridentForm的表单上使用IronPython 2.6和WebbrowserControl。这用于显示报告等。

主窗体LaunchForm有一个具有OnClick事件处理程序的按钮。此事件处理程序设置了一些内容，然后启动BackgroundWorker。后台工作程序完成，并在此回调中实例化TridentForm，显示它等等。

现在这很好用，这是一个精简的当前代码：

class LaunchForm(Form):
 def __init__(self):
            #blah blah, InitilizeComponents(), blah
  self.form_splash = None
  self.form_report = None

  self._report_worker = BackgroundWorker()
  self._report_worker.DoWork += self.runReport
  self._report_worker.RunWorkerCompleted += self.runReport_finished

 def runReport_handler(self, sender, args):
  self._report_worker.RunWorkerAsync(job_type)
  log.debug("renReport_handler called on thread %s"%(Thread.CurrentThread.ManagedThreadId))

 def runReport(self, sender, args): #run by a backgroundworker
  #do stuff, doesn't matter

 def runReport_finished(self, sender, args):
  #error checking, etc
  log.debug("reunReport_finished called on thread %s"%(Thread.CurrentThread.ManagedThreadId))

  if not self.form_report:
   log.debug("Creating TridentForm")
          self.form_report = TridentForm()
  log.debug("Getting TridentForm")
  vf = self.form_report

如您所见，self.form_report（TridentForm）在首次创建后重复使用。这样做的原因是日志语句“Creating TridentForm”和“Getting TridentForm”之间的时间长达7秒（看似没什么）。日志不说谎。无论如何，我认为这是IE的ActvieX控件的组件初始化时间。

显然，我不想等待7秒钟。

所以，我决定尝试在runReport_handler结束时创建表单 - 它会让UI冻结一点，但后台线程正在运行，所以没什么大不了的。注意有关线程ID的日志记录 - 我已经确认在同一个线程上调用了runReport_handler和runReport_finished。

所以，我的问题：简单地将该创建移动到runReport_handler的末尾会给我一些有趣的未处理的线程异常：

Traceback (most recent call last):

  File "C:\completely\unrelated\control\subclass\used\on\the\mainform.py", line 33, in OnMouseUp

TypeError: cannot access protected member OnMouseUp without a python subclass of Control

Microsoft.Scripting.ArgumentTypeException: cannot access protected member OnMouseUp without a python subclass of Control

   at IronPython.Runtime.Types.BuiltinFunction.<>c__DisplayClass6.<MakeBuiltinFunctionDelegate>b__0(Object[] callArgs, Boolean& shouldOptimize)

   at IronPython.Runtime.Types.BuiltinFunction.BuiltinMethodCaller`2.Call1(CallSite site, CodeContext context, TFuncType func, T0 arg0)

   at Microsoft.Scripting.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)

   at Microsoft.Scripting.Interpreter.DynamicInstruction`4.Run(InterpretedFrame frame)

   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)

   at Microsoft.Scripting.Interpreter.LightLambda.Run3[T0,T1,T2,TRet](T0 arg0, T1 arg1, T2 arg2)

   at IronPython.Compiler.PythonCallTargets.OriginalCallTarget2(PythonFunction function, Object arg0, Object arg1)

   at IronPython.Runtime.PythonFunction.FunctionCaller`2.Call2(CallSite site, CodeContext context, Object func, T0 arg0, T1 arg1)

   at Microsoft.Scripting.UpdateDelegates.UpdateAndExecute4[T0,T1,T2,T3,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)

   at IronPython.Runtime.PythonFunction.FunctionCaller`2.Default1Call2(CallSite site, CodeContext context, Object func, T0 arg0, T1 arg1)

   at CallSite.Target(Closure , CallSite , CodeContext , Object , Object )

   at Microsoft.Scripting.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)

   at IronPython.NewTypes.System.Windows.Forms.Control_13$14.OnMouseUp(MouseEventArgs )

   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at IronPython.NewTypes.System.Windows.Forms.Control_13$14.WndProc(Message& )

   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

和

Traceback (most recent call last):

  File "C:\TridentForm.py", line 159, in TridentNavigating

TypeError: cannot access protected member OnMouseUp without a python subclass of Control

Microsoft.Scripting.ArgumentTypeException: cannot access protected member OnMouseUp without a python subclass of Control

   at IronPython.Runtime.Types.BuiltinFunction.<>c__DisplayClass6.<MakeBuiltinFunctionDelegate>b__0(Object[] callArgs, Boolean& shouldOptimize)

   at IronPython.Runtime.Types.BuiltinFunction.BuiltinMethodCaller`2.Call1(CallSite site, CodeContext context, TFuncType func, T0 arg0)

   at Microsoft.Scripting.Interpreter.DynamicInstruction`4.Run(InterpretedFrame frame)

   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)

   at Microsoft.Scripting.Interpreter.LightLambda.Run3[T0,T1,T2,TRet](T0 arg0, T1 arg1, T2 arg2)

   at IronPython.Runtime.PythonFunction.FunctionCaller`2.Call2(CallSite site, CodeContext context, Object func, T0 arg0, T1 arg1)

   at CallSite.Target(Closure , CallSite , CodeContext , Object , Object )

   at IronPython.NewTypes.System.Windows.Forms.Control_13$14.OnMouseUp(MouseEventArgs )

   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at IronPython.NewTypes.System.Windows.Forms.Control_13$14.WndProc(Message& )

   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

两者都没有任何意义。作为奖励，现在点击主表单也会产生该消息。

提到例外：

无关控制的第33行：

def OnMouseUp（self，e）： self.pressed =假如果self.image_down： self.Invalidate（） super（SimpleImageButton，self）.OnMouseUp（e）#dies here。是的，这是Control的子类。

和TridentForm代码：

def TridentNavigating（self，sender，e）：如果e.Url！= self.dest_url和e.Url！= PLEASE_WAIT_URL：#dies here。 self是一个Form，我猜这是一个Control的子类。但是，这一行中的任何事情都没有触及clr类型 - self.dest_url是一个python属性

所以，我迷路了。

或者，如果你可以采用其他方式“预加载”TridentForm，那就太好了。谢谢。 e.Cancel = true

Answer 1

呃，这是超级（）电话......抱歉浪费每个人的时间:)。

IronPython WebbrowserControl - 表单创建问题

1 个答案: