Dino is OOF through Monday, and a few others are attending some talks. -----Original Message----- From: users-boun...@lists.ironpython.com [mailto:users-boun...@lists.ironpython.com] On Behalf Of Michael Foord Sent: Thursday, June 04, 2009 12:30 PM To: Discussion of IronPython Subject: Re: [IronPython] CallTarget0 problem
Kent Johnson wrote: > Hi, > > I am an IPy newbie, trying to run example 7.17 from IronPython in > Action. It includes the code > > delegate = CallTarget0(something.form.Close) > something.form.Invoke(delegate) > > were something.form is a Windows.Forms.Form object. The first line > above gives this error: > Traceback (most recent call last): > > File "C:\Project\MangoTest\src\SmokeTest.py", line 43, in > C:\Project\MangoTest\src\SmokeTest.py > > File "mscorlib", line unknown, in CreateDelegate > > ValueError: Error binding to target method. > > A while ago there were changes to CallTarget0 that made it incompatible with .NET methods that have a void return signature. Dino told me he would change it back so it would work again, but I guess that didn't happen... > If I change the first line to > delegate = CallTarget0(lambda: something.form.Close()) > it works fine. > This is the correct change to fix it. > Does the argument to CallTarget0() have to be a Python function? Or, > what is going on here? > > No - but it is methods with a void return signature that are the issue. Michael -- http://www.ironpythoninaction.com/ http://www.voidspace.org.uk/blog _______________________________________________ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com _______________________________________________ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com