This document provides an overview of data binding in .NET applications. It discusses data binding goals, the BindingSource class, interfaces for custom data sources, and new features in the Binding class for formatting and parsing data. The key points covered are: - The BindingSource class acts as the binding context and supports operations like add/remove on supported data sources. - Interfaces like IBindingList, INotifyPropertyChanged help create custom data sources that support binding. - The Binding class supports custom formatting/parsing of data through events and type converters. - Data binding aims to synchronize data between controls and data sources at runtime.

1. Data Binding in Depth DEV 419 Level 400 Eyal Vardi CEO Experts4D Microsoft VSTO MVP blog: www.eVardi.com

2. Agenda Data Binding Overview BindingSource Class Data Source & Interfaces Binding Class Improvement

3. Application Architecture Binding

4. What Can we Bind? One Way Two Way .NET Controls Simple Binding .NET Controls Complex Binding Data Consumers Data Providers Object ArrayList DataSet Custom Collection Config File You can only bind to the public properties

5. Simple Binding Label, TextBox, PictureBox, DateTimePicker Complex Binding DataGrid, ComboBox, ListBox

6. Data Binding Goals Run-Time: Binding Data to Controls Synchronize the data between the controls Formatting and Parsing the data Filter , Sort and Search the data Design-Time: Simple and fast to implement

8. Data Templates Data Template class Address { string Address {get;set} string City {get;set} string COuntry {get;set} string PostalCode {get;set} } User Control

9. Customize Data Source Win Need to implement one of the following data binding attributes: Default BindingPropertyAttribute Complex BindingPropertiesAttribute Lookup BindingPropertiesAttribute

10. Data Template

11. Binding Source

12. The Binding Flow * Don’t forget to add default constructor BindingSource DataSet DataTable DataSource DataMember Simple Control Complex Control Column DataBinding Property DataSource BindingSource

13. Closer look on BindingSource Control BindingSource Simple Binding Complex Binding CurrencyManager Control Data Source Binding Binding BindingContex

14. BindingSource Class (Binding Contex)

15. BindingSource.DataSource = Array => No Add & Remove List<> => Add & Remove TypOf => Add & Remove new Object() => Add & Remove * BindingList<> => Add & Remove DataView => Add, Remove, Sort, Search, Filter * Dervied Class can Support: Sort, Search and Filter ?

16. BindingSource Class (Sort, Find & Filter)

17. Data Source & Interfaces

18. IEnumerable ICollection IList IBindingList .NET 1.x Interfaces

19. .NET 2.0 New Interface

20. Build Custom Data Source Interfaces should be implemented in your custom collection IBindingListView Sort Advanced Sort Filter Search

21. Recipe… Inherit BindingList<> Add sort and search capability Implement IBindingListView for getting advance sort and filter capability

22. .NET 1.x Interfaces

23. BindingListView<T>

24. Build Custom Data Source Interfaces should be implemented in your custom type INotifyPropertyChanged IEditableObject IDataErrorInfo

25. INotifyPropertyChanged IEditableObject IDataErrorInfo

26. New Feature in Binding Class Update mode Formatting data Null Value Error notification

27. New Feature in Binding Class

28. Custom Formatting & Parsing We use the Binding class events: Format , raised when data is pushed from the data source into the control Parse , raised when data is pushed from the control into the data source Control Data Source Parse Event Format Event Binding

29. Type Conversion Custom data type to string, can be done: Override the ToString() Use the Binding Format event Write custom class for conversion String to custom data type, can be done: Use the Binding Parse event Write custom class for conversion

30. Custom Formatting & Type Converter

31. DataSet Can’t Solve All your Problems

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