Chapter 8 Implementing Data - Bound Controls

Chapter 8 Lesson 1: Creating a Data-Bound Form with the Data Sources Wizard Lesson 2: Implementing Data-Bound Controls Lesson 3: Working with the DataGridView... Lesson 1: Creating a

Chapter 8

Implementing Data-Bound Controls

Chapter 8

Lesson 1: Creating a Data-Bound Form with the Data Sources Wizard

Lesson 2: Implementing Data-Bound

Controls

Lesson 3: Working with the DataGridView

Lesson 1: Creating a Data-Bound Form with the Data Sources Wizard

What is Data-Bound controls?

– Bound and Un-Bound mode

– Data-bound controls are WinForms controls those can

easily bind with data components: DataGrid, ListBox, and a ComboBox

– have properties, which you can set as a data component

and theyre ready to present your data in WinForms:

DataSource,DisplayMember, DataMember

Dataset (Rows)

ID, Name… Dataset (Rows)Dataset (Rows)

Dataset (Rows) Position???

Lesson 1: Creating a Data-Bound Form with the Data Sources Wizard

DEMO

– Creating a Data-Bound Windows Form

– Ex p411

Track record position

– MoveNext, MovePrevious…

Change data in datasource

– Add, Delete, EndEdit

Dataset (Rows)

ID, Name… Dataset (Rows)Dataset (Rows)

Dataset (Rows) BindinhSource

Lesson 2: Implementing Data-Bound Controls

– Simple data binding: displaying a single element

BindingSource productsBindingSource = New BindingSource(NorthwindDataSet1,

“Products");

TextBox1.DataBindings.Add("Text", productsBindingSource, "ProductName");

Lesson 2: Implementing Data-Bound Controls

Binding Controls to Data

– Complex data binding: binding a control to more than one source of data

BindingSource customersBindingSource=New BindingSource(NorthwindDataSet1, "Customers");

DataGridView1.DataSource = customersBindingSource;

– Or

DataGridView1.DataSource = NorthwindDataSet1;

DataGridView1.DataMember = "Customers“;

Lesson 2: Implementing Data-Bound Controls

Navigating Records in a DataSet

– use a BindingNavigator component.

– Assign the BindingNavigator.BindingSource

property to BindingSource component

Lesson 3: Binding with Listbox/Combobox

Using unBound-mode

– Add items manually

Using bound-mode

– Single table

– Two tables

Core properties

– Datasource

– DataMember

– Displaymember

– ValueMember

SeletectedValue

– BindingSource

– Example

Lesson 3: Binding with Listbox/Combobox

Binding with single table

– DataSource

– DisplayMember

– ValueMember

Return value:

– SelectedValue

Text

Lesson 3: Binding with Listbox/Combobox

Binding with 2 tables

– DataSource

– DisplayMember

– ValueMember

Binding with

– SelectedValue

Lesson 3: Working with the

DataGridView

Configuring DataGridView Columns

Lesson 3: Working with the

DataGridView

Adding Columns to a DataGridView

– Wizard (design time)

Adding Columns to a DataGridView (p428)

– Dim ProductNameColumn As New

DataGridViewTextBoxColumn

– ProductNameColumn.Name = "ProductName"

– ProductNameColumn.HeaderText = "Product Name"

– ProductNameColumn.ValueType =

System.Type.GetType("System.String")

– DataGridView1.Columns.Add(ProductNameColumn)

Lesson 3: Working with the

DataGridView

Determining the Clicked Cell in

DataGridView

– use the DataGridView.CurrentCell property

Dim CurrentCellValue As String

CurrentCellValue = CustomersDataGridView.CurrentCell.Value.ToString

Lesson 3: Working with the

DataGridView

ErrorText proerty of row and cell in row

Validating Input in the DataGridView

– handle the DataGridView CellValidating event and cancel the edit if the value fails validation (is raised when a cell loses focus.)

Lesson 3: Working with the

DataGridView

Format a DataGridView Using Styles

– DefaultCellStyle

– AlternatingRowsDefaultCellStyle

Lab: Working with the DataGridView

– Page 431