Practical Database Programming with Visual Basic.NET

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3 Practical Database Programming with Visual Basic.NET

4 IEEE Press 445 Hoes Lane Piscataway, NJ IEEE Press Editorial Board Lajos Hanzo, Editor in Chief R. Abari M. El-Hawary S. Nahavandi J. Anderson B. M. Hammerli W. Reeve F. Canavero M. Lanzerotti T. Samad T. G. Croda O. Malik G. Zobrist Kenneth Moore, Director of IEEE Book and Information Services (BIS)

5 Practical Database Programming with Visual Basic.NET Second Edition Ying Bai Department of Computer Science and Engineering Johnson C. Smith University Charlotte, North Carolina IEEE PRESS A John Wiley & Sons, Inc., Publication

6 Copyright 2012 by the Institute of Electrical and Electronics Engineers, Inc. Published by John Wiley & Sons, Inc., Hoboken, New Jersey. All rights reserved. Published simultaneously in Canada. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923, (978) , fax (978) , or on the web at Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) , fax (201) , or online at Limit of Liability/Disclaimer of Warranty: While the publisher and author have used their best efforts in preparing this book, they make no representations or warranties with respect to the accuracy or completeness of the contents of this book and specifically disclaim any implied warranties of merchantability or fitness for a particular purpose. No warranty may be created or extended by sales representatives or written sales materials. The advice and strategies contained herein may not be suitable for your situation. You should consult with a professional where appropriate. Neither the publisher nor author shall be liable for any loss of profit or any other commercial damages, including but not limited to special, incidental, consequential, or other damages. For general information on our other products and services or for technical support, please contact our Customer Care Department within the United States at (800) , outside the United States at (317) or fax (317) Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic formats. For more information about Wiley products, visit our web site at www. wiley.com. Library of Congress Cataloging-in-Publication Data: Bai, Ying, 1956 Practical database programming with Visual Basic.NET / Ying Bai. 2nd ed. p. cm. ISBN (pbk.) 1. Microsoft Visual BASIC. 2. BASIC (Computer program language) 3. Microsoft.NET. 4. Database design. I. Title. QA76.73.B3B '768 dc Printed in United States of America

7 This book is dedicated to my wife, Yan Wang, and my daughter, Xue Bai.

9 Contents Preface xxv Acknowledgments xxvii Chapter 1 Introduction 1 Outstanding Features about This Book 2 Who This Book Is For 2 What This Book Covers 2 How This Book Is Organized and How to Use This Book 5 How to Use the Source Code and Sample Databases 6 Instructors and Customers Supports 8 Chapter 2 Introduction to Databases What Are Databases and Database Programs? File Processing System Integrated Databases Develop a Database Sample Database Relational Data Model Entity-Relationship Model Identifying Keys Primary Key and Entity Integrity Candidate Key Foreign Keys and Referential Integrity Define Relationships Connectivity ER Notation Data Normalization First Normal Form (1NF) Second Normal Form (2NF) Third Normal Form (3NF) 24 vii

10 viii Contents 2.8 Database Components in Some Popular Databases Microsoft Access Databases Database File Tables Queries SQL Server Databases Data Files Tables Views Stored Procedures Keys and Relationships Indexes Transaction Log Files Oracle Databases Data Files Tables Views Stored Procedures Indexes Initialization Parameter Files Control Files Redo Log Files Password Files Create Microsoft Access Sample Database Create the LogIn Table Create the Faculty Table Create the Other Tables Create Relationships among Tables Create Microsoft SQL Server 2008 Sample Database Create the LogIn Table Create the Faculty Table Create Other Tables Create Relationships among Tables Create Relationship between the LogIn and the Faculty Tables Create Relationship between the LogIn and the Student Tables Create Relationship between the Faculty and the Course Tables Create Relationship between the Student and the StudentCourse Tables Create Relationship between the Course and the StudentCourse Tables Create Oracle 11g XE Sample Database Create a New Oracle Customer User or User Account Create New Customer Sample Database CSE_DEPT Create the LogIn Data Table Create the Faculty Data Table Create Other Tables Create the Constraints between Tables 78

11 Contents ix Create the Constraints between the LogIn and Faculty Tables Create the Constraints between the LogIn and Student Tables Create the Constraints between the Course and Faculty Tables Create the Constraints between the StudentCourse and Student Tables Create the Constraints between the StudentCourse and Course Tables Chapter Summary 87 Homework 88 Chapter 3 Introduction to ADO.NET The ADO and ADO.NET Overview of ADO.NET The Architecture of ADO.NET The Components of ADO.NET The Data Provider The ODBC Data Provider The OLEDB Data Provider The SQL Server Data Provider The Oracle Data Provider The Connection Class The Open() Method of the Connection Class The Close() Method of the Connection Class The Dispose() Method of the Connection Class The Command and the Parameter Classes The Properties of the Command Class The Constructors and Properties of the Parameter Class Parameter Mapping The Methods of the ParameterCollection Class The Constructor of the Command Class The Methods of the Command Class The DataAdapter Class The Constructor of the DataAdapter Class The Properties of the DataAdapter Class The Methods of the DataAdapter Class The Events of the DataAdapter Class The DataReader Class The DataSet Component The DataSet Constructor The DataSet Properties The DataSet Methods The DataSet Events The DataTable Component The DataTable Constructor The DataTable Properties 125

12 x Contents The DataTable Methods The DataTable Events ADO.NET Entity Framework Advantages of Using the Entity Framework The ADO.NET 4.1 Entity Data Model Using the ADO.NET 4.1 Entity Data Model Wizard Chapter Summary 145 Homework 146 Chapter 4 Introduction to Language Integrated Query (LINQ) Overview of Language Integrated Query Some Special Interfaces Used in LINQ The IEnumerable and IEnumerable(Of T) Interfaces The IQueryable and IQueryable(Of T) Interfaces Standard Query Operators Deferred Standard Query Operators AsEnumerable (Conversion Purpose) Cast (Conversion Purpose) Join (Join Purpose) OfType (Conversion Purpose) OrderBy (Ordering Purpose) Select (Projection Purpose) Where (Restriction Purpose) Nondeferred Standard Query Operators ElementAt (Element Purpose) First (Element Purpose) Last (Element Purpose) Single (Element Purpose) ToArray (Conversion Purpose) ToList (Conversion Purpose) Introduction to LINQ Query The Architecture and Components of LINQ Overview of LINQ to Objects Overview of LINQ to DataSet Overview of LINQ to SQL Overview of LINQ to Entities Overview of LINQ to XML LINQ to Objects LINQ and ArrayList LINQ and Strings Query a String to Determine the Number of Numeric Digits Sort Lines of Structured Text by any Field in the Line LINQ and File Directories Query the Contents of Files in a Folder LINQ and Reflection 177

13 4.5 LINQ to DataSet Operations to DataSet Objects Query Expression Syntax Method-Based Query Syntax Query the Single Table Query the Cross Tables Query Typed DataSet Operations to DataRow Objects Using the Extension Methods Operations to DataTable Objects LINQ to SQL LINQ to SQL Entity Classes and DataContext Class LINQ to SQL Database Operations Data Selection Query Data Insertion Query Data Updating Query Data Deletion Query LINQ to SQL Implementations LINQ to Entities The Object Services Component The ObjectContext Component The ObjectQuery Component LINQ to Entities Flow of Execution Construct an ObjectQuery Instance Compose a LINQ to Entities Query Convert the Query to Command Trees Execute the Query Materialize the Query Implementation of LINQ to Entities LINQ to XML LINQ to XML Class Hierarchy Manipulate XML Elements Creating XML from Scratch Insert XML Update XML Delete XML Manipulate XML Attributes Add XML Attributes Get XML Attributes Delete XML Attributes Query XML with LINQ to XML Standard Query Operators and XML XML Query Extensions Using Query Expressions with XML Using XPath and XSLT with LINQ to XML Mixing XML and Other Data Models 225 Contents xi

14 xii Contents 4.9 Visual Basic.NET Language Enhancement for LINQ Lambda Expressions Extension Methods Implicitly Typed Local Variables Query Expressions Chapter Summary 236 Homework 237 Chapter 5 Data Selection Query with Visual Basic.NET 241 Part I Data Query with Visual Studio.NET Design Tools and Wizards A Completed Sample Database Application Example Visual Studio.NET Design Tools and Wizards Data Components in the Toolbox Window The DataSet DataGridView BindingSource BindingNavigator TableAdapter Data Source Window Add New Data Sources Data Source Configuration Wizard DataSet Designer Query Data from SQL Server Database Using Design Tools and Wizards Application User Interface The LogIn Form The Selection Form The Faculty Form The Course Form The Student Form Add and Utilize Visual Studio Wizards and Design Tools Add and Configure a New Data Source Query and Display Data using the DataGridView Control View the Entire Table View Each Record or the Specified Columns Use DataSet Designer to Edit the Structure of the DataSet Bind Data to the Associated Controls in LogIn Form Develop Codes to Query Data Using the Fill() Method Use Return a Single Value to Query Data for LogIn Form Develop the Codes for the Selection Form Query Data from the Faculty Table for the Faculty Form Develop Codes to Query Data from the Faculty Table Develop Codes to Query Data Using the TableAdapter Method Develop Codes to Query Data Using the LINQ to DataSet Method Display a Picture for the Selected Faculty Modify the Codes for the Select Button Event Procedure Create a Function to Select the Matched Faculty Image 293

15 Contents xiii 5.14 Query Data from the Course Table for the Course Form Build the Course Queries Using the Query Builder Bind Data Columns to the Associated Controls in the Course Form Develop Codes to Query Data for the Course Form Query Data from the Course Table Using the TableAdapter Method Query Data from the Course Table Using the LINQ to DataSet Method Query Data from Oracle Database Using Design Tools and Wizards Introduction to dotconnect for Oracle 6.30 Express Create a New Visual Basic.NET Project: SelectWizardOracle Select and Add Oracle Database 11g XE as the Data Source Modify the Codes to Access the Oracle Database 310 Part II Data Query with Runtime Objects Introduction to Runtime Objects Procedure of Building a Data-Driven Application Using Runtime Object Query Data from Microsoft Access Database Using Runtime Object Query Data Using Runtime Objects for the LogIn Form Declare Global Variables and Runtime Objects Connect to the Data Source with the Runtime Object Coding for Method 1: Using DataSet-TableAdapter to Query Data Coding for Method 2: Using the DataReader to Query Data Clean up the Objects and Terminate the Project Coding for the Selection Form Query Data Using Runtime Objects for the Faculty Form Query Data Using Runtime Objects for the Course Form Query Data Using Runtime Objects for the Student Form Coding for the Student Form_Load Event Procedure Coding for the Select Button Click Event Procedure Query Data from SQL Server Database Using Runtime Object Migrating from Access to SQL Server and Oracle Databases Query Data Using Runtime Objects for the LogIn Form Declare the Runtime Objects Connect to the Data Source with the Runtime Object Coding for Method 1: Using the TableAdapter to Query Data Coding for Method 2: Using the DataReader to Query Data The Coding for the Selection Form Query Data Using Runtime Objects For the Faculty Form Query Data Using Runtime Objects for the Course Form Retrieve Data from Multiple Tables Using Tables JOINS Query Data Using Runtime Objects for the Student Form 367

Practical Database Programming with Visual Basic.NET

Practical Database Programming with Visual Basic.NET IEEE Press 445 Hoes Lane Piscataway, NJ 08854 IEEE Press Editorial Board Lajos Hanzo, Editor in Chief R. Abari M. El-Hawary S. Nahavandi J. Anderson