I have a class that inherits from ObservableCollection and adds a few additional methods such as AddRange and RemoveRange My base method call is this: public void AddRange(IEnumerable<T> co...

I want to be able to add a range and get updated for the entire bulk. I also want to be able to cancel the action before it's done (i.e. collection changing besides the 'changed'). Related Q Wh...

Hi i am having some troube with DataTables. So What i need is to detect whenever i change any cell in the DataGrid of the DataTable that is binded. How to do it? With INotifyPropertyChanged or wit...

I am trying to create an ObservableConcurrentDictionary. This object will be used in a multithreaded application, and it's data is used to populate a control via the controls ItemsSource property. ...

I'm looking for an INotifyCollectionChanged implementation of Stack and Queue. I could roll my own but I don't want to reinvent the wheel.

Here's a basic example to explain my problem. Let's say I have ObservableCollection<int> Numbers {get; set;} and an IValueConverter that returns the sum of Numbers. Normally what I'd do...

In my WPF app, I have an ItemsControl whose items values are dependant upon the previous item displayed. The ViewModel is an audio file split into parts of variable length, and i need to display ...

I have 2 list views...and add/remove buttons between them. On collection changed event of a list-view-collection in viewmodel, can i rollback the changes for a particular condition ?

I observe an odd behaviour of WPF ItemsControls: If a set the ItemsSource to an object which implements INotifyCollectionChanged and after that set the ItemsSource to null, the CollectionView which...

I am looking into the topic why a ObservableCollection/ListCollectionView/CollectionView raises a NotSuportedException when calling the CollectionChanged with the parameter of IList. //Throws an e...

I am trying to bind observable collection to DataGrid, i want to notify when any row is edited in datagrid. My code works fine for notifing when record is added or removed but its not notifing whe...

When creating ViewModels in WPF it's sometimes necessary to transform data that is available in an ObservableCollection (the source collection) into a collection of wrapper elements that extend/res...

I am attempting to get some custom objects from the CollectionChanged event of a collection which implements INotifyCollectionChanged. MyControl_MyCollectionChanged(object sender, NotifyCollection...

I have an observable collection...SelectableDataContext<T>..And in the generic class SelectableDataContext<T> is...having two private member variables Private T item. Private bool i...

The .NET Framework contains since version 3.0 the ObservableCollection<T>, but why isn´t there a ObservableKeyedCollection<TKey, TValue>. Okay i could implement my own collection by de...

In the documentation of the event args of NotifyCollectionChangedEventArgs, there is an action called Replace (in addition to Add, Remove, Move, etc.). When can this be fired? I can't see any Repla...

I have a ListView that is databound to an ObservableCollection ... <ListView x:Name="List1" ItemsSource="{Binding MyList}" /> I can't seem to find any event that are triggered when the col...

I was trying to implement a specialized collection that works like ObservableCollection to encapsulate some more mechanisms in it, to do that i also let my collection inherit from Collection and i ...

Has anyone written a version of .Net's generic Queue that implements INotifyCollectionChanged, or is there one hidden deep in the .Net framework somewhere already?