implements INotifyCollectionChanged for add and remove

Question

Hi, i need delete and remove list child. This is my project attach...i have another form with   view.DataGrid.AutoGenerateRelations = true;  is possible too?Attachment: CS_b8cbd772.7z

Dhanasekar Mohanraj · Accepted Answer

Hi Sergio Ayala,

Thanks for the update.

If you need to get the notifications while performing any manipulation like Add
or Remove in the underlying collection you need to implement INotifyCollectionChanged
interface. Now, that you are using ObservableCollection, so you can get those
notifications in the underlying collection itself. Because ObservableCollection
itself implements INotifyCollectionChanged. And we are glad to know that the
reported problem has been resolved at your end. Please let us know if you have
any further queries on this. We are happy to help you.Regards,
Dhanasekar M.If this post is helpful, please consider Accepting it as the
solution so that other members can locate it more quickly.

Dhanasekar Mohanraj · Answer

Hi Sergio Ayala,

We regret to let you know that we are a little unclear about your scenario. Could
you please below things,Can you please share your exact
requirement?      Provide more details about your scenario with
image illustrations.It will be helpful for us to check on it and provide you with the
solution at the earliest.Regards,Dhanasekar M.

Sergio Ayala · Answer

Hi, 1-

implements INotifyCollectionChanged interface.Where should the implementation go? Should I have an observable list or is it not necessary?I attach the project2- I have another form where the elimination of a "child" row works for me. But it doesn't update the UI.I want to remove a "detail" row and not the header. When I delete a detail row, it is deleted but not displayed in the UI. The glyph disappears but I have to open another one so that the one I just deleted is referenced. I'm just using an observable list and not the "INotifyPropertyChanged" interface and it does update the UI. That's weird?  Attachment: CS_d7b261f2.zip

Dhanasekar Mohanraj · Answer

Hi Sergio Ayala,

Please find the response for the reported issue below,

Reported issue

Response

Implements
  INotifyCollectionChanged interface.

Where should the implementation go? Should I have an observable list
  or is it not necessary?

If the
  data source implements the INotifyCollectionChanged interface, then SfDataGrid
  control will automatically refresh the UI when an item is added, removed, or
  while the list cleared. When you add or remove the item in ObservableCollection,
  SfDataGrid automatically refreshes the UI as ObservableCollection implements
  INotifyCollectionChanged. But when you do the same in List, SfDataGrid will
  not refresh the UI automatically.
   
  The recordPropertyChanged event is raised when the DataModel property value is changed if the
  DataModel implements the INotifyPropertyChanged interface. The event receives two arguments namely the sender that handles the DataModel and
  PropertyChangedEventArgs as objects.
   
  For more
  information related to INotifyCollectionChanged  and property changed, please refer to the below user guide documentation link,
   
  UG Link:
  
  https://help.syncfusion.com/wpf/datagrid/data-binding

https://help.syncfusion.com/wpf/datagrid/data-binding#recordpropertychanged

I have
  another form where the elimination of a "child" row works for me.
  But it doesn't update the UI.
  I
  want to remove a "detail" row and not the header. When I delete a
  detail row, it is deleted but not displayed in the UI. The glyph disappears
  but I have to open another one so that the one I just deleted is referenced.
  I'm
  just using an observable list and not the "INotifyPropertyChanged"
  interface and it does update the UI. That's weird?

Currently, we are
  checking the reported issue with the provided sample on our end. We need two more
  business days to validate this. We will update you with further details on August
  08, 2022.
   
  We appreciate your
  patience until then.

Regards,Dhanasekar M.

Sergio Ayala · Answer

Hi, I just changed my "details" related list (not header). I changed from INumerable to Observable and "voi lá". Now deleting the row works without even implementing the INotifyCollectionChanged interface. So why do they ask me to implement it if it works without it? no entiendo. Gracias por responder...