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

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

Data Binding Overview

BindingSource Class

Data Source & Interfaces

Binding Class Improvement

Application Architecture Binding

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

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

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

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

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

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

Need to implement one of the following data binding attributes:

Default BindingPropertyAttribute

Complex BindingPropertiesAttribute

Lookup BindingPropertiesAttribute

Data Template

Binding Source

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

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

BindingSource Class (Binding Contex)

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 ?

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

BindingSource Class (Sort, Find & Filter)

Data Source & Interfaces

IEnumerable ICollection IList IBindingList .NET 1.x Interfaces

.NET 2.0 New Interface

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

Interfaces should be implemented in your custom collection

IBindingListView

Sort

Advanced Sort

Filter

Search

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

Inherit BindingList<>

Add sort and search capability

Implement IBindingListView for getting advance sort and filter capability

.NET 1.x Interfaces

BindingListView<T>

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

Interfaces should be implemented in your custom type

INotifyPropertyChanged

IEditableObject

IDataErrorInfo

INotifyPropertyChanged IEditableObject IDataErrorInfo

INotifyPropertyChanged

IEditableObject

IDataErrorInfo

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

Update mode

Formatting data

Null Value

Error notification

New Feature in Binding Class

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

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

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

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

Custom Formatting & Type Converter

DataSet Can’t Solve All your Problems

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