Chapter 6

Introduction to System.Net

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What we have in this chapter?

1. Introduction

2. Layers of System.Net

3. Basic Network Types and Services

4. Using IP Addresses

5. Working with Different Address Families

6. Accessing Protected Resources

7. Accessing DNS

8. C++ Services and Types Program Example

9. C# Services and Types Program Example

10. VB .NET Services and Types Program Example

11. Using the Socket-Level Classes

12. Socket Classes

13. Reading and Writing with NetworkStream

14. Using the Socket-Level Helper Classes

15. C++ Socket Program Example

16. C# Socket Program Example

17. VB .NET Socket Program Example

18. Application Protocols

19. Protocol Support

20. HTTP Connection Management

21. HTTP Error Handling

22. File Scheme Support

23. C++ HTTP Protocol Program Example

24. C# HTTP Protocol Program Example

25. VB .NET HTTP Protocol Program Example

26. Request-Response Model

27. Resolving URIs with WebRequest and WebResponse

28. Request-Response Model Helper Classes

29. Deciding When to Use System.Net

30. Common Scenarios for Using System.Net

31. Accessing an Existing Service or Protocol Provided by System.Net

32. Implementing a Protocol Not Provided by System.Net

33. Extending a Higher Layer of the Stack That Uses System.Net

34. System.Net vs. Web Services or .NET Remoting

35. C++ Request and Response Program Example

36. C# Request and Response Program Example

37. VB .NET Request and Response Program Example

38. C++ Request and Response Web Client Program Example

39. C# Request and Response Web Client Program Example

40. VB .NET Request and Response Web Client Program Example

Summary

This chapter will introduce the System.Net namespace. It will describe the purpose of the classes in System.Net and review its layers of functionality. We will review the basic types and services such as address manipulation and interaction with DNS. We will discuss the socket-level classes, including Socket, NetworkStream, and other helper classes. We then will walk through the HttpWebRequest and HttpWebResponse classes, which provide access to the HTTP protocol. Finally, we will review the request-response URI resolution pattern and its helpers.

This chapter also will cover recommendations on when to use System.Net versus the higher-level communication classes provided by Web services and .NET Remoting. Starting with these classes and their basic purpose, the next five chapters will describe the workings of these classes in much more detail.

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