Observable collection update using mvvm

Rajesh Sahu

I have observable collection there i am doing some filter using LINQ ,after filter i need to update the filter data to observable collection to my data grid so please help me its urgent.

2 Replies

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Tapan Patel9y ago
If you are using observable collection then you can use ListCollectionView and add the custom filter to filter out the data and once you do that, try calling CollectionView.GetDefaultView(datasource as parameter).Refresh method.
Once system executes these call, it will filter the data adn will also refresh the grid with filtered objects.
ListCollectionView view;
view = CollectionViewSource.GetDefaultView(YourDataGrid.ItemsSource) as ListCollectionView;
view.Filter= delegate(object o){
//your filter logic
//make sure to return true or false based on your filter condition.
}
once you do this make a call to GetDefaultView refresh method.
CollectionViewSource.GetDefaultView(YourDataGrid.ItemsSource).Refresh();
If you still can't see the filtered record, please let me know.
Manikandan Murugesan9y ago
Refer the following Links :

https://www.codeproject.com/Questions/516725/WPFplusUpdateplusDatagridplusBindingplusToplusObse

https://stackoverflow.com/questions/13144320/wpf-mvvm-observable-collection-not-updating-gui

https://stackoverflow.com/questions/21325060/bind-observablecollection-using-mvvm

https://stackoverflow.com/questions/41222117/update-the-list-view-observable-collection-using-mvvm