将函数作为参数传递给 COM 对象函数
我使用的是 UPnP 对象方法 IUPnPDeviceFinder::[CreateAsyncFind][1]，第三个参数是回调函数。
我尝试创建自己的 COM 对象，但该方法不会回调我的函数。这是我的代码：
class Callback():
_public_methods_ = ['DeviceAdded','DeviceRemoved', 'SearchComplete']
_reg_progid_ = "UPnP.PythonCallback"
_reg_clsid_ = pythoncom.CreateGuid()
def DeviceAdded (device, UDN, calltype):
print (device, ": ", calltype, " UDN: ", UDN)
return
win32com.server.register.UseCommandLine(Callback)
callserver = Dispatch("UPnP.PythonCallback")
deviceType = "urn:schemas-upnp-org:device:MediaServer:1"
devices = finder.CreateAsyncFind(deviceType,0, callserver)
finder.StartAsyncFind(devices)
实际上，我只需要这样的东西：
def DeviceAdded (device, UDN, calltype):
print (device, ": ", calltype, " UDN: ", UDN)
return
deviceType = "urn:schemas-upnp-org:device:MediaServer:1"
devices = finder.CreateAsyncFind(deviceType,0, DeviceAdded)
finder.StartAsyncFind(devices)
Microsoft 在 VBScript 上做了一个例子。这正是我想在Python上做的(http://msdn.microsoft.com/en-us/library/windows/desktop/aa381078(v=VS.85).aspx) 如何将函数作为 COM 对象的参数传递？
I'm using the UPnP Object Method IUPnPDeviceFinder::[CreateAsyncFind][1] and the third parameter is a callback function.
I've tried to create my own COM Object but the method don't call back my function. Here's my code:
class Callback():
_public_methods_ = ['DeviceAdded','DeviceRemoved', 'SearchComplete']
_reg_progid_ = "UPnP.PythonCallback"
_reg_clsid_ = pythoncom.CreateGuid()
def DeviceAdded (device, UDN, calltype):
print (device, ": ", calltype, " UDN: ", UDN)
return
win32com.server.register.UseCommandLine(Callback)
callserver = Dispatch("UPnP.PythonCallback")
deviceType = "urn:schemas-upnp-org:device:MediaServer:1"
devices = finder.CreateAsyncFind(deviceType,0, callserver)
finder.StartAsyncFind(devices)
Actually, I just need something like this:
def DeviceAdded (device, UDN, calltype):
print (device, ": ", calltype, " UDN: ", UDN)
return
deviceType = "urn:schemas-upnp-org:device:MediaServer:1"
devices = finder.CreateAsyncFind(deviceType,0, DeviceAdded)
finder.StartAsyncFind(devices)
Microsoft made a example on VBScript. That's exactly what I want to do on Python (http://msdn.microsoft.com/en-us/library/windows/desktop/aa381078(v=VS.85).aspx)
How can I pass a function as a parameter on a COM Object?
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评论（1）
一个问题（也许不是唯一的问题）是
DeviceAdded是一个类的方法，因此它需要一个self参数：我认为您的第一个问题是在正确的轨道上例如，至少与您提供的链接中的 VBScript（和 C++ 链接）进行比较。
另外，您不应在每次注册回调时创建新的 GUID。调用一次
pythoncom.CreateGuid并将结果粘贴到代码中：One problem (maybe not the only one) is
DeviceAddedis a method of a class, so it needs aselfparameter:I think you are on the right track with your first example, at least when compared to the VBScript (and C++ link) in the link you provided.
Also, You shouldn't create a new GUID each time you register the callback. Call
pythoncom.CreateGuidonce and paste the result into the code: