when use validate in simplechildwindow, not display as expect

[lwqwag]

i use validate property binding to xaml with validate, childwindow loaded first time validate errors not displayed as expect .when error has been cleared,i triggered an error,then the childwindow could display the validate error as expect just like the demo in https://github.com/lwqwag/TestMahApp Thx for your help.

[timunie]

Hi @lwqwag

would it be an option for you to switch to INotifyDataErrorInfo? in my experience it is better than the old way validation worked. I can provide a sample if you wish.

Happy coding Tim

[lwqwag]

Hi @timunie Thanks for your reply. INotifyDataErrorInfo validation method will be a option for me. Your help is greatly appreciated.

[timunie]

@lwqwag I am sorry, but my Idea doesn't work either. It seems to be a bug, that it does not get the Validation when loaded. By the way: Many thanks for the great example. 👍

Happy coding Tim

[timunie]

I investigated this issue a bit further and it turned out that the validation works correct if I wrap the Content of the ChildWindowinside an AdornerDekorator.

Here is my test branch. Maybe it helps for a solution: https://github.com/timunie/MahApps.Metro.SimpleChildWindow/tree/ValidationTest

Have a great weekend Tim

[lwqwag]

@timunie I tested the branch you provided,and it worked well. It's a great job! Thanks a lot again.

[timunie]

Good morning @lwqwag please reopen this issue. I think it is a bug anyway, because my solution was just a workaround.

Thanks, Tim

[punker76]

I think it is a bug anyway,

Yeah, it's a WPF thing :-(