Data Binding in Depth DEV 419 Level 400

1. Eyal Vardi CEO Experts4DMicrosoft VSTO MVPblog: www.eVardi.com Data Binding in DepthDEV 419 Level 400

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

3. Binding Application Architecture

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

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

9. Customize Data Source Win • Need to implement one of the following data binding attributes: • DefaultBindingPropertyAttribute • ComplexBindingPropertiesAttribute • LookupBindingPropertiesAttribute

10. Data Template

11. Binding Source

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

13. Closer look on BindingSource BindingSource Control Data Source Simple Binding Binding CurrencyManager Control Binding Complex 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. BindingListView<T>

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

24. INotifyPropertyChanged • IEditableObject • IDataErrorInfo

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

26. New Feature in Binding Class

27. Custom Formatting & Parsing • We use theBinding 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 Binding Parse Event Format Event

28. 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

29. Custom Formatting & Type Converter

30. DataSet Can’t Solve All your Problems

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