HUsing ADO.NET 2.0 with Microsoft Access Databases - Cengage ...

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40 Appendix H Using ADO.NET 2.0 with Microsoft Access Databases Objects, Properties, and Settings: Object Property Setting Form1 Name MainForm Font Tahoma, 10 point MaximizeBox False Size 547, 361 StartPosition CenterScreen Text Cartwright Industries Button1 Name exitButton Location 435, 289 Size 75, 26 Text E&xit Code: ' Project name: ' Project purpose: ' ' ' ' ' Created/revised by: Option Explicit On Option Strict On Public Class MainForm TblItemsDataGridView AutoSizeColumnsMode Fill Location 12, 37 Size 515, 231 FIGURE H.55 Cartwright Project The project displays the data contained in a database. It also allows the user to add records, delete records, and save the changes made to records. on Appendix H C5779 39147 Page 40 07/10/06--JHR Private Sub exitButton_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles exitButton.Click Me.Close() End Sub Private Sub TblItemsBindingNavigatorSaveItem_Click_ (ByVal sender As System.Object, ByVal e As System.EventArgs) _ Handles TblItemsBindingNavigatorSaveItem.Click Me.Validate() Me.TblItemsBindingSource.EndEdit() Me.TblItemsTableAdapter.Update(Me.ItemsDataSet.tblItems) End Sub (Figure is continued on next page)
Quick Review 41 Private Sub MainForm_Load(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles MyBase.Load 'TODO: This line of code loads data into the 'ItemsDataSet.tblItems' table. You can move, 'or remove it, as needed. Me.TblItemsTableAdapter.Fill(Me.ItemsDataSet.tblItems) End Sub End Class FIGURE H.56 Appendix H C5779 39147 Page 41 07/10/06--JHR Quick Review • Companies and individuals use databases to organize information. • You can use Visual Basic to access the data stored in many different types of databases. • Databases created by Microsoft Access are relational databases. A relational database can contain one or more tables. Each table contains fields and records. • Most tables contain a primary key that uniquely identifies each record. • The data in a relational database can be displayed in any order, and you can control the amount of information you want to view. • Visual Basic 2005 uses a technology called ADO.NET 2.0 to access the data stored in a database. • The connection between a database and an application that uses ADO.NET 2.0 is only temporary. • To access the data stored in a database, you first connect the database to an application. Doing this creates a dataset that contains objects, such as table objects and field objects. • You can display the information contained in a dataset by binding one or more of the dataset objects to one or more controls in the application’s interface. • A TableAdapter object connects a database to a DataSet object. • A BindingSource object connects a DataSet object to the bound controls on a form. • In most applications, the statement to fill a dataset with data is entered in the form’s Load event procedure. • The BindingSource object uses an invisible record pointer to keep track of the current record. • The location of the record pointer in a dataset is stored in the BindingSource object’s Position property. • You can use the BindingSource object’s Move methods to move the record pointer in a dataset. • You use a SQL SELECT statement to specify the fields and records to include in a dataset.
Page 1 and 2: H Using ADO.NET 2.0 with Microsoft
Page 3 and 4: Database Terminology 3 Notice that
Page 5 and 6: Connecting a Database to an Applica
Page 7 and 8: Connecting a Database to an Applica
Page 9 and 10: Binding the Objects in a Dataset 9
Page 17 and 18: Accessing the Records in a Dataset
Page 19 and 20: Dataset Designer 19 You can use the
Page 21 and 22: Dataset Designer 21 Appendix H C577
Page 23 and 24: Dataset Designer 23 3. In the Choos
Page 25 and 26: Dataset Designer 25 Used by the WHE
Page 27 and 28: Dataset Designer 27 The user can ru
Page 29 and 30: Programming Tutorial 29 TOE Chart:
Page 31 and 32: Programming Tutorial 31 6. Click th
Page 33 and 34: Programming Tutorial 33 Appendix H
Page 35 and 36: Programming Tutorial 35 5. Click th
Page 37 and 38: Programming Tutorial 37 Option Expl
Page 39: Programming Example 39 TOE Chart: T
Page 43 and 44: Self-Check Questions and Answers 43
Page 45 and 46: Review Questions 45 3. A group of r
Page 47 and 48: Computer Exercises 47 3. Write a SE
Page 49 and 50: Case Projects 49 c. Allow the user

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