Validating data types

By using another thread to modify the collection, your user interface remains responsive to user interaction.The INotify Data Error Info interface enables data entity classes to implement custom validation rules and expose validation results asynchronously.When an Items Control is data bound to a collection, an item container is generated for each item.In some cases, item containers are removed from the visual tree.A collection of data can be grouped, sorted, or filtered.WPF 4.5 enables the data to be rearranged when the data is modified.Some forums can only be seen by registered members.

WPF supports data binding to objects that implement ICustom Type Provider, also known as custom types. In certain cases, you might get the Binding Expression of a Binding and need information about the source and target objects of the binding.

Validating input field value is essential as much as validating required fields.

There will be situation where we need to validate user input from entering inappropriate data to form fields.

For more information about using a Task to perform asynchronous operations, see Task Parallelism (Task Parallel Library). While WPF does not define a markup extension to be used for events, third parties are able to create a markup extension that can be used with events.

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