1. XML Web Services in Visual Studio.NET Peter Ty Developer Evangelist.NET and Developer Group

2. Agenda  Web Service Infrastructure  Web Services in Visual Studio.NET  Hardcore Web Services

3. Agenda  Web Service Infrastructure  Web Services in Visual Studio.NET  Hardcore Web Services

4.  Web Service (ASMX in ASP.NET)  Invoke Web Service methods Web Service Infrastructure What makes a Web Service? ASMX

5. ASMX Web Service (ASMX in ASP.NET) – –Invoke Web Service methods Web Service Description Language (WSDL) – –Describe Web Services – –Describes dependencies (e.g., DataSets / XSD) Web Service Infrastructure What makes a Web Service? XSD WSDL

6. Web Service (ASMX in ASP.NET) – –Invoke Web Service methods Web Service Description Language (WSDL) – –Describe Web Services – –Describes dependencies (e.g., DataSets / XSD) Discovery Documents (DISCO) – –Publish Web Services Web Service Infrastructure What makes a Web Service? ASMX XSD WSDL WSDL DISCO

7. Web Service (ASMX in ASP.NET) – –Invoke Web Service methods Web Service Description Language (WSDL) – –Describe Web Services – –Describes dependencies (e.g., DataSets / XSD) Discovery Documents (DISCO) – –Publish Web Services UDDI Web Service Infrastructure What makes a Web Service? ASMX XSD WSDL WSDL DISCO DISCO UDDI

8. Web Service Infrastructure Protocols  Basic: HTTP Get and HTTP Post  Primitives (integers, strings, etc)  Arrays of primitives  Default: Simple Object Access Protocol (SOAP)  Structures  Enumerations  Classes  XML DataSets  Arrays of anything

9. Agenda  Web Service Infrastructure  Web Services in Visual Studio.NET  Hardcore Web Services

10. Web Services in Visual Studio.NET Tools  On the Server Side  Generates WSDL  Generates.vsdisco  Generates HTML text page  Supports breakpoints, tracing, etc.  On the Client Side  Generates proxy class with sync and async calls  Supports “Step-Into” across web service call

11. Build Your First Web Service  Define a vision  Brainstorming ideas  Set Deliverables (what to expose)  Imagine how much people will love it  Let’s build it !!

12. Two Quick Steps to your first Web Service  Step 1. Create a project  Choose your favorite programming language  Choose the web service project type  Give it a Name

14. …Two Quick Steps to your first Web Service  Step 2. Add a Web Service to the Project  Name the Web Service  Code a Function  Add an attribute keyword to turn that function into a Web Service method !!  That’s it !!

18. Build Web Services using Visual Studio.NET  Expose functionality as service  No need to learn XML  Interface is automatically generated  Seamless deployment  Reuse existing Web Services  VS.NET generates the plumbing  Full IntelliSense support  Build and consume with any VS language

19. Build Your Web Service Clients  Web based (Browser) or Windows Based  Unified programming model  Just Drag and Drop and a little code  Imagine how you will love it  Let’s build it !!

20. Three Quick Steps to your first Web Service Client  Step 1. Create a project  Choose your favorite programming language  Choose the correct project type (ASP.NET web applications)  Give it a Name  Step 2. Add a Web Reference to the Project  Locating a web service  Add the reference for the target web service  And…

22. …Quick Steps to your first Web Service Client  Step 3. Drag and Drop your way to a web form client (plus a little coding…)  Use the tool box and drag and drop elements to the form  Click on a control (a button usually) to open the code behind page  Implement any code to take action (call the web service!!)  That’s it !!

25. Test that Web Service Client  Run Solution Build  Right click the aspx page and choose to view in browser  Test out the web service through this web client you built !!

27. More Web Services demo!

28. Agenda  Web Service Infrastructure  Web Services in Visual Studio.NET  Hardcore Web Services

29. Hard Core Web Services ASP.NET Intrinsics  Request  Server Variables (Host Address, Host Name)  Cookies  Security (Client Certificate, Authentication, Encryption)  User  Identity  Role  Session and Application  State  Response  Cookies  Cache

30. Hard Core Web Services Security  Basic, Digest, Passport, Kerberos, and Windows authentication  “Roll your own” authentication  HTTPS / SSL encryption  Supports many business models  Secure ecommerce transactions  Pay per use  Subscription

31. Hard Core Web Services Asynchronous Calls  Synchronous Programming Model  Foo(Param1, Param2) As String  Asynchronous Programming Model  BeginFoo(Param1, Param2, Callback)  Callback(AsyncResult)  EndFoo(AsyncResult) As String

32. Hard Core Web Services SOAP Headers - Server  Make a Class That Inherits SoapHeader  Add Custom Properties  Associate This With Your Web Service Public Class MyHeader : Inherits SoapHeader Public Username As String Public Username As String Public Password As String Public Password As String End Class

33. Hard Core Web Services SOAP Headers - Client  Create Instance of the Header Class  Populate With Values  Attach To Web Service Object  Call Method WebServ ws = new WebServ(); MyHeader a = new MyHeader(); a.Username = "admin"; a.Password = "password"; ws.MyHeader = a; ws.DoSomething();

34. Hard Core Web Services SoapExtension  Used for More Advanced Functionality  Intercept Calls to a Web Service  Pre and Post Processing

35. Hardcore Web Services

36. Session Summary  Web Services Are The Building Blocks For The Next Generation Of The Internet  Gives Client Access to any kind of Data  Make Business-to-Business Easy  Visual Studio.NET Provides Great Tools

37. Resources  MSDN Web site at  msdn.microsoft.com  External Sites  www.gotdotnet.com www.gotdotnet.com  Looking for ideas?: Web Service Search Engine  http://www.salcentral.com/salnet/webservi ceswsdl.asp http://www.salcentral.com/salnet/webservi ceswsdl.asp http://www.salcentral.com/salnet/webservi ceswsdl.asp

38. Questions And Answers