Hi,
I implemented code approach to dynamically add filters to the grid as described in http://help.infragistics.com/Help/Doc/WPF/2013.1/CLR4.0/html/xamDataPresenter_Add_Filter_Conditions.html
RecordFilterChanged(-ing) event seem not to be triggered, though. I need a way to not only to add, but also to observe filter changes.
Any idea on how this could be achieved? I'm using latest version of your WPF package.
Thanks,
Artur
Hello Artur,
Thank you for your post.
I have been looking into your requirement it seems that the RecordFilterChanged event is fired when the user changes record filter criteria. What I can suggest you is to handle the CollectionChanged of RecordFiltersCollection. This way you would be able to observe changes you want. For Example:
xamDataGrid1.FieldLayouts[0].RecordFilters.CollectionChanged += RecordFilters_CollectionChanged;
You can take a look at the following link for more details about events in XamDataGrid:
http://help.infragistics.com/Doc/WPF/2015.1/CLR4.0/?page=InfragisticsWPF4.DataPresenter.v15.1~Infragistics.Windows.DataPresenter.XamDataGrid_members.html
Please let me know if you require any further assistance on this matter.
What I observed is that RecordFiltersCollection is prepopulated automatically by grid with RrecordFilter objects. Those contain no filter conditions so grid behaves like there were no filters initially.
Later on, when user would change filter criteria, grid would find a reference to relevant RecordFilter associated with a column (field) and update filter conditions on it, and boost the version by 1. Id est, values on particular reference of RecordFilter class would be updated, nothing gets replaced in the collection.
As you see - no collection wide events are involved and subscribing to INotifyCollectionChanged.CollectionChanged will yield no callbacks.
What I'm after is a way to be notified about a filter change, no matter if caused by user, program logic, etc..
Regards,
I have been looking into your issue a nd the functionality that you are trying to achieve. It is expected that the RecordFilterChanged event does not fire when you adding Filter by code. It seems that currently our XamDataGrid control does not provide appropriate single event, which you can use in order to determine when XamDataGrid records are filtered out by code and UI.
You can try to achieve your requirement by using ‘RecordsInviewChanged’ event of XamDataGrid. This event will fire when records are filtered out, but it also will fire when scrolling. You can take a look at the following forum thread for more details:
http://www.infragistics.com/community/forums/t/77382.aspx
Please let me know if you require any further assistance on the matter.
Hello,
I am just checking your progress on the issue that you are having.
If you require any further assistance please do not hesitate to ask