.NET

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 InfrastructureWhat makes a Web
Service?

• Web Service (ASMX in ASP .NET)
• Invoke Web Service methods

5
Web Service InfrastructureWhat makes a Web
Service?

• Web Service (ASMX in ASP.NET)
• Invoke Web Service methods
• Web Service Description Language (WSDL)
• Describe Web Services
• Describes dependencies (e.g., DataSets / XSD)

XSD
6
Web Service InfrastructureWhat makes a Web
Service?

• 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

XSD
7
Web Service InfrastructureWhat makes a Web
Service?

• 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

XSD
8
Web Service InfrastructureProtocols

• 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 .NETTools

• 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
• Lets 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

13
(No Transcript)
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 ltWebMethod()gt to turn
  that function into a Web Service method !!
• Thats it !!

15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
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
• Lets 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

21
(No Transcript)
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!!)
• Thats it !!

23
(No Transcript)
24
(No Transcript)
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 !!

26
(No Transcript)
27
More Web Services demo!
28
Agenda

• Web Service Infrastructure
• Web Services in Visual Studio .NET
• Hardcore Web Services

29
Hard Core Web ServicesASP .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 ServicesSecurity

• 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 ServicesAsynchronous 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 ServicesSOAP 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 Password As String
• End Class

33
Hard Core Web ServicesSOAP 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 ServicesSoapExtension

• 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
• Looking for ideas? Web Service Search Engine
• http//www.salcentral.com/salnet/webserviceswsdl.a
  sp

38
Questions And Answers
39
(No Transcript)