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In this case, you use the Items Source property to set the object source for the control. Country = customer Country _ Select cust ' Create a new collection for binding based on the LINQ query. tracked Customers = New Data Service Collection(Of Customer)(customer Query) ' Bind the root Stack Panel element to the collection ' related object binding paths are defined in the XAML. In the previous XAML example, the XAML code binds the master Data Service Collection Note Data binding is only supported for controls that listen for change events by implementing the INotify Collection Changed and INotify Property Changed interfaces.

Use the Display Member Path property to specify which property of the bound object to display. Country == customer Country select cust; // Create a new collection for binding based on the LINQ query. tracked Customers = New Data Service Collection(Of Customer)(customer Query, _ Tracking Mode. Data Context = tracked Customers ' Create a LINQ query that returns customers with related orders. When a control does not support this kind of change notification, changes that are made to the underlying Data Service Collection' Create a new collection for binding based on the LINQ query.

tracked Customers = New Data Service Collection(Of Customer)(customer Query) ' Load all pages of the response at once. Data service client classes that are generated when you use the Add Service Reference dialog box or the Data Svc tool implement this interface.

If you provide your own client data classes, you must use another type of collection for data binding.

If you are binding an element to a related object that is returned by a navigation property, include the path in the binding defined for the Items Source property. Country == customer Country select cust; // Create a new collection for binding based on the LINQ query. tracked Customers = new Data Service Collection' Create a LINQ query that returns customers with related orders. Auto Change Tracking, "Customers", _ Address Of On My Property Changed, Address Of On My Collection Changed) ' Bind the root Stack Panel element to the collection ' related object binding paths are defined in the XAML. tracked Customers = New Data Service Collection(Of Customer)(customer Query) ' Bind the Customers combobox to the collection. Display Member = "Customer ID" customers Combo Box.

This path is relative to the root object set by the Data Context property of the parent control. tracked Customers = new Data Service Collection(customer Query, Tracking Mode. Data Context = tracked Customers; // Create a LINQ query that returns customers with related orders. Data Source = tracked Customers When you use the Add Service Reference dialog to generate the client data service classes, a project data source is also created that is based on the generated Data Service Context.

As a result, the changed item is no longer in the correct sort location or group. NET 3.5 or earlier, you can force a Collection View to be updated at runtime by calling its Refresh() method.

This class represents a dynamic data collection that provides notifications when items get added or removed.

When you use an instance of Data Service Collection for data binding, the WCF Data Services client libraries handle these events to ensure that objects tracked by the Data Service Context remain synchronized with the data in the bound UI element.

Whilst having an Observable Collection of “Person” objects, and creating a collectionview for this and also adding a Sort Description on a “Name” property on the “Person” object, I noticed that if I change the “Name” property on one of the objects (they are shown in a listbox, having the “Name” property databound to a textblock), and thereafter calling Refresh() on the Collection View, the refresh will actually take more than a second with only about 50 items.

Ok, if I measure the call to Refresh() it doesn’t take more than 100 ms or so, but like the call sets in motion alot of other things that will happen after my method has exited, which is understandable since the documentation states that the whole view is recreated and therefore I assume the whole tree of items of the visualtree concerned is re-created too. Since I’m a quidnunc I won’t be satisfied with this! First, let’s examine exactly what is happening in your scenario.

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