Dino's right that this is behavior that we'd like to make more natural and that
we'll look into fixing.
However, there's a classic python-style work-around for this issue that can
also be used to handle the case where a class implements two conflicting
interfaces. This relies on the fact that methods are first class entities in
Python. BTW - I'd suggest that you use shorter form names in actual code:
>>> import clr
>>> clr.AddReferenceByPartialName("System.Windows.Forms")
>>> import System
>>> dgv = System.Windows.Forms.DataGridView()
>>> dgv.BeginInit() #fails
Traceback (most recent call last):
File , line 0, in input##102
AttributeError: 'DataGridView' object has no attribute 'BeginInit'
>>> System.ComponentModel.ISupportInitialize.BeginInit(dgv) #works
>>>
This is the same idiom that Python uses for explicitly calling a super classes
method on a subclass and can be used here to call an interface method on an
object that explicitly implements and interface but doesn't expose the methods
directly.
While we'll try to do the right thing for you behind the scenes more often,
this idiom is valuable to know as the "true" way to call these kinds of
methods. This same approach can also be used sometimes with COM objects when
we fail to do the right thing for you automagically.
-Jim
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dino Viehland
Sent: Thursday, February 16, 2006 8:56 AM
To: Discussion of IronPython
Subject: Re: [IronPython] howto access interface method?
The issue here is that the interface's methods are marked private, but are
exposed publicly via the interface (aka explicit interface implementation)
-hence the reason you need the cast in C#.
This is a shortcoming we're aware of but we don't have a bug on it. I'll go
ahead and file a bug on this so it doesn't get lost. The fix may be a little
complex for this one so it may not make it for beta 4 but I'll initially open
it as a beta 4 bug so we'll give it a shot.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chee Meng
Sent: Thursday, February 16, 2006 12:58 AM
To: [email protected]
Subject: [IronPython] howto access interface method?
hi,
I am using the DataGridView object which implements the interface
ISupportInitialize,
and that have 2 methods BeginInit and EndInit .
However, through Ironpython,
the 2 methods cannot be found.
is there a way to access the 2 methods in python?
#((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
this.dataGridView1.BeginInit()
above code gives this error, AttributeError: 'DataGridView' object has no
attribute 'BeginInit'
thks
regards
cheemeng
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