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C# web developer s guide - Hướng dẫn lập trình C#
1 YEAR UPGRADE BUYER PROTECTION PLAN C# NET We b D e v e l o p e r ’s G u i d e Develop and Deliver Enterprise-Critical Desktop and Web Applications with C# NET • Complete Case Studies with Ready-to-Run Source Code and Full Explanations • Hundreds of Developing & Deploying, Migrating, and Debugging Sidebars, Security Alerts, and C# NET FAQs • Complete Coverage of Web Services and the Integrated Development Environment (IDE) Adrian Turtschi DotThatCom.com Jason Werry Greg Hack Joseph Albahari Saurabh Nandu Wei Meng Lee Technical Editor Series Editor 167_C#_FM.qxd 12/5/01 10:16 AM Page i solutions@syngress.com With more than 1,500,000 copies of our MCSE, MCSD, CompTIA, and Cisco study guides in print, we continue to look for ways we can better serve the information needs of our readers One way we that is by listening Readers like yourself have been telling us they want an Internet-based service that would extend and enhance the value of our books Based on reader feedback and our own strategic plan, we have created a Web site that we hope will exceed your expectations Solutions@syngress.com is an interactive treasure trove of useful information focusing on our book topics and related technologies The site offers the following features: ■ One-year warranty against content obsolescence due to vendor product upgrades You can access online updates for any affected chapters ■ “Ask the Author” customer query forms that enable you to post questions to our authors and editors ■ Exclusive monthly mailings in which our experts provide answers to reader queries and clear explanations of complex material ■ Regularly updated links to sites specially selected by our editors for readers desiring additional reliable information on key topics Best of all, the book you’re now holding is your key to this amazing site Just go to www.syngress.com/solutions, and keep this book handy when you register to verify your purchase Thank you for giving us the opportunity to serve your needs And be sure to let us know if there’s anything else we can to help you get the maximum value from your investment We’re listening www.syngress.com/solutions 167_C#_FM.qxd 12/5/01 10:16 AM Page ii 167_C#_FM.qxd 12/5/01 10:16 AM Page iii YEAR UPGRADE BUYER PROTECTION PLAN C# NET We b D e v e l o p e r ’s G u i d e Adrian Turtschi DotThatCom.com Jason Werry Greg Hack Joseph Albahari Saurabh Nandu Wei Meng Lee Technical Editor Series Editor 167_C#_FM.qxd 12/5/01 10:16 AM Page iv Syngress Publishing, Inc., the author(s), and any person or firm involved in the writing, editing, or production (collectively “Makers”) of this book (“the Work”) not guarantee or warrant the results to be obtained from the Work There is no guarantee of any kind, expressed or implied, regarding the Work or its contents.The Work is sold AS IS and WITHOUT WARRANTY You may have other legal rights, which vary from state to state In no event will Makers be liable to you for damages, including any loss of profits, lost 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Publishing, Inc 800 Hingham Street Rockland, MA 02370 C# NET Web Developer’s Guide Copyright © 2002 by Syngress Publishing, Inc All rights reserved Printed in the United States of America Except as permitted under the Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher, with the exception that the program listings may be entered, stored, and executed in a computer system, but they may not be reproduced for publication Printed in the United States of America ISBN: 1-928994-50-4 Technical Editor: Saurabh Nandu Freelance Editorial Manager: Maribeth Corona-Evans Co-Publisher: Richard Kristof Cover Designer: Michael Kavish Acquisitions Editor: Catherine B Nolan Page Layout and Art by: Shannon Tozier Developmental Editor: Kate Glennon Copy Editor: Darren Meiss CD Production: Michael Donovan Indexer: Rich Carlson Distributed by Publishers Group West in the United States and Jaguar Book Group in Canada 167_C#_FM.qxd 12/5/01 10:16 AM Page v Acknowledgments We would like to acknowledge the following people for their kindness and support in making this book possible: Richard Kristof and Duncan Anderson of Global Knowledge, for their generous access to the IT industry’s best courses, instructors, and training facilities Ralph Troupe, Rhonda St John, and the team at Callisma for their invaluable insight into the challenges of designing, deploying and supporting world-class enterprise networks Karen Cross, Lance Tilford, Meaghan Cunningham, Kim Wylie, Harry Kirchner, Kevin Votel, Kent Anderson, and Frida Yara of Publishers Group West for sharing their incredible marketing experience and expertise Mary Ging, Caroline Hird, Simon Beale, Caroline Wheeler,Victoria Fuller, Jonathan Bunkell, and Klaus Beran of Harcourt International for making certain that our vision remains worldwide in scope Annabel Dent of Harcourt Australia for all her help David Buckland,Wendi Wong, Marie Chieng, Lucy Chong, Leslie Lim, Audrey Gan, and Joseph Chan of Transquest Publishers for the enthusiasm with which they receive our books Kwon Sung June at Acorn Publishing for his support Ethan Atkin at Cranbury International for his help in expanding the Syngress program Jackie Gross, Gayle Vocey, Alexia Penny, Anik Robitaille, Craig Siddall, Darlene Morrow, Iolanda Miller, Jane Mackay, and Marie Skelly at Jackie Gross & Associates for all their help and enthusiasm representing our product in Canada Lois Fraser, Connie McMenemy, and the rest of the great folks at Jaguar Book Group for their help with distribution of Syngress books in Canada v 167_C#_FM.qxd 12/5/01 10:16 AM Page vi Contributors Todd Carrico (MCDBA, MCSE) is a Senior Database Engineer for Match.com Match.com is a singles portal for the digital age In addition to its primary Web site, Match.com provides back-end services to AOL, MSN, and many other Web sites in its affiliate program.Todd specializes in design and development of high-performance, high-availability data architectures primarily on the Microsoft technology His background includes designing, developing, consulting, and project management for companies such as Fujitsu, Accenture, International Paper, and GroceryWorks.com In addition to his contribution to C# NET Web Developer’s Guide,Todd has also contributed chapters to other books in the Syngress NET Series including the ASP NET Web Developer’s Guide, and the VB NET Developer’s Guide.Todd resides in Sachse,TX, with his wife and two children Mark Tutt is a Senior Software Engineer with MICROS Systems MICROS provides complete information management solutions for the hospitality industry, including software, hardware, enterprise systems integration, consulting, and support Mark is the principle designer of a number of software packages, including Guest Service Solution, a customer relationship management system for the MICROS Restaurant Enterprise Series platform In addition to his product development duties, Mark is a key contributor to the design and development of system integration software and customer-specific product extensions that allow MICROS clients to fully integrate MICROS products into their overall technology plans Mark currently resides in Baltimore, Maryland with his wife Malinda and their twin sons, Fred and Jackson Jason Werry (MCSD) runs a consulting firm, Synergy Data Solutions, in Australia He currently provides strategic and technical consulting to his clients and specializes in Windows-based enterprise systems development Jason has an extensive background using Microsoft technologies and is currently developing state-of-the-art,Web-based applications on the NET platform His clients have ranged from a Taiwanese multimedia company to various government departments and local startups A natural born programmer, Jason started coding Z80 processors in Assembly at age 13 Since then he has used most popular vi 167_C#_FM.qxd 12/5/01 10:16 AM Page vii programming languages and presently enjoys working with SQL Server, MTS, IIS,Visual Basic, and C# Jason holds a bachelor’s degree in Mathematics/ Computer Science from The University of Queensland He dedicates his writing to his loving wife, LiHsing Patrick Coelho (MCP) is an Instructor at The University of Washington Extension, North Seattle Community College, Puget Sound Center, and Seattle Vocational Institute, where he teaches courses in Web Development (DHTML, ASP, XML, XSLT, C#, and ASP NET) Patrick is a Co-Founder of DotThatCom.com, a company that provides consulting, online development resources, and internships for students He is currently working on a NET solution with contributing author David Jorgensen and nLogix Patrick holds a Bachelor’s of Science degree from the University of Washington, Bothell Patrick lives in Puyallup,WA with his wife Angela David Jorgensen (MCP) is an Instructor at North Seattle Community College, University of Washington extension campus, and Puget Sound Centers He is also developing courses for Seattle Vocational Institute, which teaches NET and Web development to the underprivileged in the Seattle area David also provides internship opportunities through his company DotThatCom.com, which does online sample classes and chapters of books David holds a bachelor’s degree in Computer Science from St Martin’s College and resides in Puyallup,WA with his wife Lisa and their two sons Scott and Jacob Greg Hack is a Senior Software Engineer with Allscripts Healthcare Solutions Greg has over 15 years experience developing software on platforms ranging from the mainframe to the desktop using a wide variety of languages and technologies Recent work includes a Web-based application that allows patients to view their medical records and a Pocket PC application that delivers clinical information to physicians at the point of care Axel Goldbach is a Senior Consultant with modulo3 GmbH, a consulting company based in Germany and specializing in project management consulting throughout Europe modulo3 is a process implementation specialist for the major networking frameworks, including eXtreme Programming, MSF and V Modell Axel currently provides senior-level strategic and technical consulting to all modulo3 clients in Germany and Central Europe His duties include analysis and development of multi-tiered applications in heterogeneous environments vii 167_C#_FM.qxd 12/5/01 10:16 AM Page viii Axel also works as a technical scout and trainer for modulo3 His training specialties include programming languages, networking, and academic fields such as development methodology, parser- and interpreter-technology, theory of complexity, and provable correct software Joseph Albahari is a freelance consultant and developer with over 10 years experience in designing networked systems He has led a string of successful projects, from custom application frameworks for start-up companies, to highperformance OLAP and data warehousing systems for telecommunications giants His knowledge in object-oriented user interface design has been called upon in the planning or production of many large and complex systems, where well-balanced abstractions are of key importance Joseph is also experienced in SQL Server database administration, and has developed high-performance solutions for clients with specialized requirements—such as a replication system providing field level synchronization, or a high-throughput bulk-copying agent Joseph holds a Bachelor’s degree in computer science and physics Adrian Turtschi (MCSE, MCSD) is Lead Architect Solution Development with Avanade (Germany), where he is responsible for the solution offering in the mobile computing space He has been working on the Microsoft NET platform since fall 2000, specializing in developing enterprise systems using Web Services He is particularly interested in using Web Services to bridge platform and system boundaries Prior to joining Avanade, Adrian worked for KPMG’s Global Knowledge Exchange in Boston, where he helped design and develop KPMG's global knowledge management and collaboration solution, used by its 100,000 professionals world-wide Adrian has work experience in Switzerland, the Netherlands, and the US He has degrees in Mathematics and Computer Science He currently lives in Berlin, Germany viii 167_C#_FM.qxd 12/5/01 10:16 AM Page ix Technical Editor and Reviewer Saurabh Nandu is the Founder of www.MasterCSharp.com which concentrates on teaching C# and NET He worked with HTML, JavaScript, Flash 5.0 before he started programming in Java Saurabh has been impressed by the power and flexibility of NET He is currently employed by YesSoftware Inc as Technical Evangelist Technical Editor’s Acknowledgements I would like to thank my friend Nanu Jogi without whose direction I would have never got into working on the NET Platform I would also like to thank my family, especially my brother Pritesh, for their support Series Editor Wei Meng Lee is Series Editor for Syngress Publishing’s NET Developer Series He is currently lecturing at The Center for Computer Studies, Ngee Ann Polytechnic, Singapore.Wei Meng is actively involved in Web development work and conducts training for Web developers and Visual Basic programmers He has co-authored two books on WAP He holds a Bachelor’s degree in Information Systems and Computer Science from the National University of Singapore.The first and second books of the NET series, VB NET Developer’s Guide (ISBN: 1-928994-48-2), and ASP NET Developer’s Guide (ISBN: 1-928994-51-2) are currently available from Syngress Publishing ix ... continue Statement Using the return Statement Using the goto Statement Understanding Properties and Indexers Using Properties Get Accessor Set Accessor Accessing Lists with Indexers Using Delegates... has also contributed chapters to other books in the Syngress NET Series including the ASP NET Web Developer? ? ?s Guide, and the VB NET Developer? ? ?s Guide. Todd resides in Sachse,TX, with his wife... languages Microsoft has invested billions of dollars and years of research in the creation of NET .NET is a comprehensive strategy ,consisting of operating systems, database servers, application servers,