DependencyObject.OnPropertyInvalidated() == DependencyObject.OnPropertyChanged()?

Hi all,

As may be seen in several other threads, I'm attempting to develop a
custom control using WPF. I was trying to override the
OnPropertyInvalidated() method of System.Windows.Controls.Control.
Apparently this property does not exist anymore, but there is an
OnPropertyChanged() method. Are these equivalent?

Thanks,
Jason

Hi Jason,

Yes, you should override OnPropertyChanged instead. OldValue and NewValue
are now part of the event args that are passed in so you can use those
values instead of your cache values.

Thanks,
Tina

"Jason Dolinger" <jdolinger@lab49.com> wrote in message
news:%23a9OfWp%23FHA.3064@TK2MSFTNGP10.phx.gbl...
> Hi all,
>
> As may be seen in several other threads, I'm attempting to develop a
> custom control using WPF. I was trying to override the
> OnPropertyInvalidated() method of System.Windows.Controls.Control.
> Apparently this property does not exist anymore, but there is an
> OnPropertyChanged() method. Are these equivalent?
>
> Thanks,
> Jason

Jason Dolinger wrote:
> Hi all,
>
> As may be seen in several other threads, I'm attempting to develop a
> custom control using WPF. I was trying to override the
> OnPropertyInvalidated() method of System.Windows.Controls.Control.
> Apparently this property does not exist anymore, but there is an
> OnPropertyChanged() method. Are these equivalent?
>
> Thanks,
> Jason

Scratch that, OnPropertyChanged() is gone also... Now what?


Jason

Tina Tam [MSFT] wrote:
> Hi Jason,
>
> Yes, you should override OnPropertyChanged instead. OldValue and NewValue
> are now part of the event args that are passed in so you can use those
> values instead of your cache values.
>
> Thanks,
> Tina
>
> "Jason Dolinger" <jdolinger@lab49.com> wrote in message
> news:%23a9OfWp%23FHA.3064@TK2MSFTNGP10.phx.gbl...
>
>>Hi all,
>>
>>As may be seen in several other threads, I'm attempting to develop a
>>custom control using WPF. I was trying to override the
>>OnPropertyInvalidated() method of System.Windows.Controls.Control.
>>Apparently this property does not exist anymore, but there is an
>>OnPropertyChanged() method. Are these equivalent?
>>
>>Thanks,
>>Jason
>
>
>

Hi Tina, as I mentioned in a different followup, OnPropertyChanged() is
gone as well. Now what?

Thanks!
Jason

Hi Jason,

If you're using the Nov CTP OnPropertyChanged() should be there. The method
has not been removed and I have verified that it is in the Nov CTP. The
OnPropertyChanged() on Control would be inherited from FrameworkElement.

Thanks,
Tina
-----------------
This posting is provided "AS IS" with no warranties, and confers no rights.



"Jason Dolinger" <jdolinger@lab49.com> wrote in message
news:%23C4BuVr%23FHA.1032@TK2MSFTNGP11.phx.gbl...
> Jason Dolinger wrote:
>> Hi all,
>>
>> As may be seen in several other threads, I'm attempting to develop a
>> custom control using WPF. I was trying to override the
>> OnPropertyInvalidated() method of System.Windows.Controls.Control.
>> Apparently this property does not exist anymore, but there is an
>> OnPropertyChanged() method. Are these equivalent?
>>
>> Thanks,
>> Jason
>
> Scratch that, OnPropertyChanged() is gone also... Now what?
>
>
> Jason

Hey Tina,

You are correct, that method does exist. I'm still learning the ins and
outs of Visual Studio and I had my Object Browser set to hide protected
methods...

Jason

Tina Tam [MSFT] wrote:
> Hi Jason,
>
> If you're using the Nov CTP OnPropertyChanged() should be there. The method
> has not been removed and I have verified that it is in the Nov CTP. The
> OnPropertyChanged() on Control would be inherited from FrameworkElement.
>
> Thanks,
> Tina
> -----------------
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
>
>
> "Jason Dolinger" <jdolinger@lab49.com> wrote in message
> news:%23C4BuVr%23FHA.1032@TK2MSFTNGP11.phx.gbl...
>
>>Jason Dolinger wrote:
>>
>>>Hi all,
>>>
>>>As may be seen in several other threads, I'm attempting to develop a
>>>custom control using WPF. I was trying to override the
>>>OnPropertyInvalidated() method of System.Windows.Controls.Control.
>>>Apparently this property does not exist anymore, but there is an
>>>OnPropertyChanged() method. Are these equivalent?
>>>
>>>Thanks,
>>>Jason
>>
>>Scratch that, OnPropertyChanged() is gone also... Now what?
>>
>>
>>Jason
>
>
>