Dears,
I have a problem with passing out type parameter to win32com function. In C#
envirement one of the COM’s function prototype is:
int ActEasyIF.ReadDeviceBlock(string szDevice, int Isize, out int
IpIdata);
when calling the function ,it passes a first element of a int array to the
third parameter, like this:
ACTMULTILib.ActEasyIF aa = new ACTMULTILib.ActEasyIF();
aa.ReadDeviceBlock(“D0”, 10, out da[0]))
The function read 10 integer value from device’s register D0 to D9,and write
those integer value to the array da, from 0 to 9 . The function run success in
C#.
I call this COM function by win32comclient in python
>>> from win32com.client import Dispatch
>>> import pythoncom
>>> parser = Dispatch("ActMulti.ActEasyIF")
>>> parser.ActLogicalStationNumber = 1
>>> parser.Open()
0 #Open device success
>>> da = [0] *10
>>> parser.ReadDeviceBlock("D0", 10, da[0])
(0, 256) #read data success
>>> da #but…
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
After call the function, it returns a tuple,the first element means read
success, second is value read from device’s D0 register, but the value don’t
write to list da .
I think the problem is the method of passing the third parameter,but how to
pass "out" parameter to win32com, is there anything hint?
Thank you very much.
Jianhua
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