[Python.NET] Passing in null as the value for a nullable type.

[Zane D. Purvis]

Try System.Nullable[System.DateTime]()

I haven't tested that, but I think that's what you need.


On Wed, Feb 5, 2014 at 1:25 PM, John Gill <jgill at tokiomillennium.com> wrote:

>  Thanks.   At least on my system there is no such thing as System.Null
>
>
>
> In c# at least, null is just a keyword in the language.
>
>
>
>
>
> *From:* PythonDotNet [mailto:pythondotnet-bounces+jgill=
> tokiomillennium.com at python.org] *On Behalf Of *Tribble, Brett
> *Sent:* Wednesday, February 05, 2014 1:45 PM
> *To:* A list for users and developers of Python for .NET
> *Subject:* Re: [Python.NET] Passing in null as the value for a nullable
> type.
>
>
>
> I believe you want to import System and pass System.Null. I can't remember
> if I've done this, but I think so.
>
>
>
> *From:* PythonDotNet [mailto:pythondotnet-bounces+btribble=
> ea.com at python.org] *On Behalf Of *John Gill
> *Sent:* Wednesday, February 05, 2014 8:47 AM
> *To:* pythondotnet at python.org
> *Subject:* [Python.NET] Passing in null as the value for a nullable type.
>
>
>
> I am sure there is a really simple answer to this one... but so far it is
> eluding me.
>
>
>
> I have a class something like this:
>
>
>
> public class Foo
>
> {
>
>   ...
>
>     public int process_date(DateTime? mydate)
>
>    {
>
>       ...
>
>    }
>
> }
>
>
>
>
>
> I want to call this from python using pythondotnet.
>
>
>
>
>
> Calling it like this works fine:
>
>
>
>      mydate = DateTime(0)
>
>      Foo().process_date(mydate)
>
>
>
> But if I try to pass in a null as the date as follows:
>
>
>
>     Foo().process_date(None)
>
>
>
> I get:
>
>
>
>    TypeError: No method matches given arguments
>
>
>
> Hoping there is something really obvious I am missing here.
>
>
>
> John
>
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