Introduction
This chapter introduces Web services, which promote software reusability in distributed systems where applications execute across multiple computers on a network. A Web service is a class that allows its methods to be called by methods on other machines via common data formats and protocols, such as XML (see Chapter 19) and HTTP. In .NET, the over-the-network method calls are commonly implemented through the Simple Object Access Protocol (SOAP), an XML-based protocol describing how to mark up requests and responses so that they can be transferred via protocols such as HTTP. Using SOAP, applications represent and transmit data in a standardized XML-based format.
Microsoft is encouraging software vendors and e-businesses to deploy Web services. As increasing numbers of organizations worldwide have connected to the Internet, the concept of applications that call methods across a network has become more practical. Web services represent the next step in object-oriented programmingrather than developing software from a small number of class libraries provided at one location, programmers can access Web service class libraries distributed worldwide.
Web services facilitate collaboration and allow businesses to grow. By purchasing Web services and using extensive free Web services that are relevant to their businesses, companies can spend less time developing new applications. E-businesses can use Web services to provide their customers with enhanced shopping experiences. Consider an online music store. The store's Web site provides links to information about various CDs, enabling users to purchase the CDs or to learn about the artists. Another company that sells concert tickets provides a Web service that displays upcoming concert dates for various artists, then allows users to buy tickets. By consuming the concert-ticket Web service on its site, the online music store can provide an additional service to its customers and increase its site traffic. The company that sells concert tickets also benefits from the business relationship by selling more tickets and possibly by receiving revenue from the online music store for the use of its Web service. Many Web services are provided at no charge. For example, Amazon and Google offer free Web services that you can use in your own applications to access the information they provide.
Visual Web Developer and the .NET Framework provide a simple, user-friendly way to create Web services. In this chapter, we show how to use these tools to create, deploy and use Web services. For each example, we provide the code for the Web service, then present an application that uses the Web service. Our first examples analyze Web services and how they work in Visual Web Developer. Then we demonstrate Web services that use more sophisticated features, such as session tracking (discussed in Chapter 21) and manipulating objects of user-defined types.
As in Chapter 21, we distinguish between Visual C# 2005 Express and Visual Web Developer 2005 Express in this chapter. We create Web services in Visual Web Developer, and we create client applications that use these Web services using both Visual C# 2005 and Visual Web Developer 2005. The full version of Visual Studio 2005 includes the functionality of both Express editions.
NET Web Services Basics |
Preface
Index
Introduction to Computers, the Internet and Visual C#
- Introduction
- What Is a Computer?
- Computer Organization
- Early Operating Systems
- Personal Computing, Distributed Computing and Client/Server Computing
- Hardware Trends
- Microsofts Windows® Operating System
- Machine Languages, Assembly Languages and High-Level Languages
- C#
- C, C++, Java and Visual Basic
- Other High-Level Languages
- The Internet and the World Wide Web
- Extensible Markup Language (XML)
- Microsofts .NET
- The .NET Framework and the Common Language Runtime
- Test-Driving a C# Application
- Software Engineering Case Study: Introduction to Object Technology and the UML
- Wrap-Up
- Web Resources
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Introduction to the Visual C# 2005 Express Edition IDE
- Introduction
- Overview of the Visual Studio 2005 IDE
- Menu Bar and Toolbar
- Navigating the Visual Studio 2005 IDE
- Using Help
- Using Visual Programming to Create a Simple Program Displaying Text and an Image
- Wrap-Up
- Web Resources
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Introduction to C# Applications
- Introduction
- A Simple C# Application: Displaying a Line of Text
- Creating Your Simple Application in Visual C# Express
- Modifying Your Simple C# Application
- Formatting Text with Console.Write and Console.WriteLine
- Another C# Application: Adding Integers
- Memory Concepts
- Arithmetic
- Decision Making: Equality and Relational Operators
- (Optional) Software Engineering Case Study: Examining the ATM Requirements Document
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Introduction to Classes and Objects
- Introduction
- Classes, Objects, Methods, Properties and Instance Variables
- Declaring a Class with a Method and Instantiating an Object of a Class
- Declaring a Method with a Parameter
- Instance Variables and Properties
- UML Class Diagram with a Property
- Software Engineering with Properties and set and get Accessors
- Value Types vs. Reference Types
- Initializing Objects with Constructors
- Floating-Point Numbers and Type decimal
- (Optional) Software Engineering Case Study: Identifying the Classes in the ATM Requirements Document
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Control Statements: Part 1
- Introduction
- Algorithms
- Pseudocode
- Control Structures
- if Single-Selection Statement
- if...else Double-Selection Statement
- while Repetition Statement
- Formulating Algorithms: Counter-Controlled Repetition
- Formulating Algorithms: Sentinel-Controlled Repetition
- Formulating Algorithms: Nested Control Statements
- Compound Assignment Operators
- Increment and Decrement Operators
- Simple Types
- (Optional) Software Engineering Case Study: Identifying Class Attributes in the ATM System
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Control Statements: Part 2
- Introduction
- Essentials of Counter-Controlled Repetition
- for Repetition Statement
- Examples Using the for Statement
- do...while Repetition Statement
- switch Multiple-Selection Statement
- break and continue Statements
- Logical Operators
- Structured Programming Summary
- (Optional) Software Engineering Case Study: Identifying Objects States and Activities in the ATM System
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Methods: A Deeper Look
- Introduction
- Packaging Code in C#
- static Methods, static Variables and Class Math
- Declaring Methods with Multiple Parameters
- Notes on Declaring and Using Methods
- Method Call Stack and Activation Records
- Argument Promotion and Casting
- The Framework Class Library
- Case Study: Random-Number Generation
- Case Study: A Game of Chance (Introducing Enumerations)
- Scope of Declarations
- Method Overloading
- Recursion
- Passing Arguments: Pass-by-Value vs. Pass-by-Reference
- (Optional) Software Engineering Case Study: Identifying Class Operations in the ATM System
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Arrays
- Introduction
- Arrays
- Declaring and Creating Arrays
- Examples Using Arrays
- Case Study: Card Shuffling and Dealing Simulation
- foreach Statement
- Passing Arrays and Array Elements to Methods
- Passing Arrays by Value and by Reference
- Case Study: Class GradeBook Using an Array to Store Grades
- Multidimensional Arrays
- Case Study: Class GradeBook Using a Rectangular Array
- Variable-Length Argument Lists
- Using Command-Line Arguments
- (Optional) Software Engineering Case Study: Collaboration Among Objects in the ATM System
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
- Special Section: Building Your Own Computer
Classes and Objects: A Deeper Look
- Introduction
- Time Class Case Study
- Controlling Access to Members
- Referring to the Current Objects Members with the this Reference
- Indexers
- Time Class Case Study: Overloaded Constructors
- Default and Parameterless Constructors
- Composition
- Garbage Collection and Destructors
- static Class Members
- readonly Instance Variables
- Software Reusability
- Data Abstraction and Encapsulation
- Time Class Case Study: Creating Class Libraries
- internal Access
- Class View and Object Browser
- (Optional) Software Engineering Case Study: Starting to Program the Classes of the ATM System
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Object-Oriented Programming: Inheritance
- Introduction
- Base Classes and Derived Classes
- protected Members
- Relationship between Base Classes and Derived Classes
- Constructors in Derived Classes
- Software Engineering with Inheritance
- Class object
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Polymorphism, Interfaces & Operator Overloading
- Introduction
- Polymorphism Examples
- Demonstrating Polymorphic Behavior
- Abstract Classes and Methods
- Case Study: Payroll System Using Polymorphism
- sealed Methods and Classes
- Case Study: Creating and Using Interfaces
- Operator Overloading
- (Optional) Software Engineering Case Study: Incorporating Inheritance and Polymorphism into the ATM System
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Exception Handling
- Introduction
- Exception Handling Overview
- Example: Divide by Zero Without Exception Handling
- Example: Handling DivideByZeroExceptions and FormatExceptions
- .NET Exception Hierarchy
- finally Block
- Exception Properties
- User-Defined Exception Classes
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Graphical User Interface Concepts: Part 1
- Introduction
- Windows Forms
- Event Handling
- Control Properties and Layout
- Labels, TextBoxes and Buttons
- GroupBoxes and Panels
- CheckBoxes and RadioButtons
- PictureBoxes
- ToolTips
- NumericUpDown Control
- Mouse-Event Handling
- Keyboard-Event Handling
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Answers To Self-Review Exercises
- Exercises
Graphical User Interface Concepts: Part 2
- Introduction
- Menus
- MonthCalendar Control
- DateTimePicker Control
- LinkLabel Control
- ListBox Control
- CheckedListBox Control
- ComboBox Control
- TreeView Control
- ListView Control
- TabControl Control
- Multiple Document Interface (MDI) Windows
- Visual Inheritance
- User-Defined Controls
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Multithreading
- Introduction
- Thread States: Life Cycle of a Thread
- Thread Priorities and Thread Scheduling
- Creating and Executing Threads
- Thread Synchronization and Class Monitor
- Producer/Consumer Relationship without Thread Synchronization
- Producer/Consumer Relationship with Thread Synchronization
- Producer/Consumer Relationship: Circular Buffer
- Multithreading with GUIs
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Strings, Characters and Regular Expressions
- Introduction
- Fundamentals of Characters and Strings
- string Constructors
- string Indexer, Length Property and CopyTo Method
- Comparing strings
- Locating Characters and Substrings in strings
- Extracting Substrings from strings
- Concatenating strings
- Miscellaneous string Methods
- Class StringBuilder
- Length and Capacity Properties, EnsureCapacity Method and Indexer of Class StringBuilder
- Append and AppendFormat Methods of Class StringBuilder
- Insert, Remove and Replace Methods of Class StringBuilder
- Char Methods
- Card Shuffling and Dealing Simulation
- Regular Expressions and Class Regex
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Graphics and Multimedia
- Introduction
- Drawing Classes and the Coordinate System
- Graphics Contexts and Graphics Objects
- Color Control
- Font Control
- Drawing Lines, Rectangles and Ovals
- Drawing Arcs
- Drawing Polygons and Polylines
- Advanced Graphics Capabilities
- Introduction to Multimedia
- Loading, Displaying and Scaling Images
- Animating a Series of Images
- Windows Media Player
- Microsoft Agent
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Files and Streams
- Introduction
- Data Hierarchy
- Files and Streams
- Classes File and Directory
- Creating a Sequential-Access Text File
- Reading Data from a Sequential-Access Text File
- Serialization
- Creating a Sequential-Access File Using Object Serialization
- Reading and Deserializing Data from a Sequential-Access Text File
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Extensible Markup Language (XML)
- Introduction
- XML Basics
- Structuring Data
- XML Namespaces
- Document Type Definitions (DTDs)
- W3C XML Schema Documents
- (Optional) Extensible Stylesheet Language and XSL Transformations
- (Optional) Document Object Model (DOM)
- (Optional) Schema Validation with Class XmlReader
- (Optional) XSLT with Class XslCompiledTransform
- Wrap-Up
- Web Resources
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Database, SQL and ADO.NET
- Introduction
- Relational Databases
- Relational Database Overview: Books Database
- SQL
- ADO.NET Object Model
- Programming with ADO.NET: Extracting Information from a Database
- Querying the Books Database
- Programming with ADO.NET: Address Book Case Study
- Using a DataSet to Read and Write XML
- Wrap-Up
- Web Resources
- Summary
- Terminology
- Self-Review Exercises
- Exercises
ASP.NET 2.0, Web Forms and Web Controls
- Introduction
- Simple HTTP Transactions
- Multitier Application Architecture
- Creating and Running a Simple Web-Form Example
- Web Controls
- Session Tracking
- Case Study: Connecting to a Database in ASP.NET
- Case Study: Secure Books Database Application
- Wrap-Up
- Web Resources
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Web Services
- Introduction
- .NET Web Services Basics
- Simple Object Access Protocol (SOAP)
- Publishing and Consuming Web Services
- Session Tracking in Web Services
- Using Web Forms and Web Services
- User-Defined Types in Web Services
- Wrap-Up
- Web Resources
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Networking: Streams-Based Sockets and Datagrams
- Introduction
- Connection-Oriented vs. Connectionless Communication
- Protocols for Transporting Data
- Establishing a Simple TCP Server (Using Stream Sockets)
- Establishing a Simple TCP Client (Using Stream Sockets)
- Client/Server Interaction with Stream-Socket Connections
- Connectionless Client/Server Interaction with Datagrams
- Client/Server Tic-Tac-Toe Using a Multithreaded Server
- WebBrowser Control
- .NET Remoting
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Searching and Sorting
- Introduction
- Searching Algorithms
- Sorting Algorithms
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Data Structures
- Introduction
- Simple-Type structs, Boxing and Unboxing
- Self-Referential Classes
- Linked Lists
- Stacks
- Queues
- Trees
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Generics
- Introduction
- Motivation for Generic Methods
- Generic Method Implementation
- Type Constraints
- Overloading Generic Methods
- Generic Classes
- Notes on Generics and Inheritance
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Collections
- Introduction
- Collections Overview
- Class Array and Enumerators
- Non-Generic Collections
- Generic Collections
- Synchronized Collections
- Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Appendix A. Operator Precedence Chart
Appendix B. Number Systems
- B.1. Introduction
- B.2. Abbreviating Binary Numbers as Octal and Hexadecimal Numbers
- B.3. Converting Octal and Hexadecimal Numbers to Binary Numbers
- B.4. Converting from Binary, Octal or Hexadecimal to Decimal
- B.5. Converting from Decimal to Binary, Octal or Hexadecimal
- B.6. Negative Binary Numbers: Twos Complement Notation
- Summary
- Terminology
- Self-Review Exercises
- Exercises
Appendix C. Using the Visual Studio 2005 Debugger
- C.1. Introduction
- C.2. Breakpoints and the Continue Command
- C.3. The Locals and Watch Windows
- C.4. Controlling Execution Using the Step Into, Step Over, Step Out and Continue Commands
- C.5. Other Features
- C.6. Wrap-Up
- Summary
- Terminology
- Self-Review Exercises
Appendix D. ASCII Character Set
Appendix E. Unicode®
- E.1. Introduction
- E.2. Unicode Transformation Formats
- E.3. Characters and Glyphs
- E.4. Advantages/Disadvantages of Unicode
- E.5. Using Unicode
- E.6. Character Ranges
- Summary
- Terminology
- Self-Review Exercises
- Answers to Self-Review exercises
- Exercises
Appendix F. Introduction to XHTML: Part 1
- F.1. Introduction
- F.2. Editing XHTML
- F.3. First XHTML Example
- F.4. W3C XHTML Validation Service
- F.5. Headers
- F.6. Linking
- F.7. Images
- F.8. Special Characters and More Line Breaks
- F.9. Unordered Lists
- F.10. Nested and Ordered Lists
- F.11. Web Resources
Appendix G. Introduction to XHTML: Part 2
- G.1. Introduction
- G.2. Basic XHTML Tables
- G.3. Intermediate XHTML Tables and Formatting
- G.4. Basic XHTML Forms
- G.5. More Complex XHTML Forms
- G.6. Internal Linking
- G.7. Creating and Using Image Maps
- G.8. meta Elements
- G.9. frameset Element
- G.10. Nested framesets
- G.11. Web Resources
Appendix H. HTML/XHTML Special Characters
Appendix I. HTML/XHTML Colors
Appendix J. ATM Case Study Code
- Appendix J. ATM Case Study Code
- J.1. ATM Case Study Implementation
- J.2. Class ATM
- J.3. Class Screen
- J.4. Class Keypad
- J.5. Class CashDispenser
- J.6. Class DepositSlot
- J.7. Class Account
- J.8. Class BankDatabase
- J.9. Class Transaction
- J.10. Class BalanceInquiry
- J.11. Class Withdrawal
- J.12. Class Deposit
- J.13. Class ATMCaseStudy
- J.14. Wrap-Up
Appendix K. UML 2: Additional Diagram Types
Appendix L. Simple Types
Index
EAN: 2147483647
Pages: 600
