Building XML Web Services

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Building XML Web Services Using .NET Technology
Speaker ???, Doff Park Feel_at_NET Senior
Consultant ForAce, WebTime ???? MCSD, MCT, CTT
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Agenda

• Introduction to XML Web Services
• Building and Using XML Web Services
• Using Visual Studio .NET
• Conjunction with COM Services
• QA

Building XML Web Services Using .NET Technology
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Introduction to XML Web Services

• Evolution of Distributed Applications
• Introducing Web Services
• Overview of Web Service Architectures
• The Web Service Provider
• The Web Service Consumer
• The Web Service Broker
• Overview of Using UDDI
• The Web Service Description Language
• The Web Service Discovery
• The Web Service Proxies
• Using XML Web Services in Local and Global Area

Building XML Web Services Using .NET Technology
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Introduction to XML Web Services
Evolution of Distributed Applications

• What is a distributed application?
• Why do we need distributed applications?
• Distributed applications as service providers

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Introduction to XML Web Services
Introducing Web Services

• URL-addressable set of functionality exposed over
  a network
• Based on Internet technologies
• Building blocks
• The future of distributed applications

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Introduction to XML Web Services
Overview of Web Service Architectures - 1
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Introduction to XML Web Services
Overview of Web Service Architectures - 2
UDDI
SOAP
SOAP
SOAP
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Introduction to XML Web Services
Overview of Web Service Architectures - 3
Web Service
Web Service
Firewall
Firewall
Internet
Web Service Consumer
Firewall
Web Service
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Introduction to XML Web Services
The Web Service Provider

• Web Servers
• The .NET Common Language Runtime

Building XML Web Services Using .NET Technology
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Introduction to XML Web Services
The Web Service Consumer

• Minimum functionality
• Service location
• Proxies
• Asynchronous calls

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Introduction to XML Web Services
The Web Service Broker

• Interactions between brokers and providers
• Interactions between brokers and consumers
• UDDI registries

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Introduction to XML Web Services
Overview of Using UDDI
Developer
Consumer
Web Service
UDDI Services
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Introduction to XML Web Services
The Web Service Description Language

• WSDL is used for describing a Web service
• WSDL file acts as a contract between a Web
  service consumer and a Web service

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Introduction to XML Web Services
The Web Service Discovery

• Disco is a mechanism for enumerating the Web
  services that are available at a particular
  endpoint and locating the service contracts for
  the enumerated Web services
• Locating Discovery Document Using Dosco.exe
• disco /outd\disco /uadmi /ppassword ?
• http//domain/catalog.disco
• Programmatic Discovery

System.Web.Services.Discovery
DiscoveryClientProtocol
DiscoveryDocument
DiscoveryClientResultCollection
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Introduction to XML Web Services
The Web Service Proxies

• Proxies are entities that act as intermediaries
  for other entities
• wsdl http//domain/path/service1.asmx?wsdl
• wsdl /lVB /protocolHttpGet /outSample.vb ?
• http//domain/path/service1.asmx?wsdl

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Introduction to XML Web Services
Using XML Web Services in Local Global Area
DB Server SQL Server
Local Area
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Building and Using XML Web Services Using
Visual Studio .NET

• Creating a Web Service Project
• The Components of a Web Service Project
• Exposing Web Service Methods
• Creating a Web Service Consumer Project
• Adding a Web Reference
• Viewing a WSDL
• Imported Files
• Creating a Web Service Proxy and Calling Web
  Methods
• Files Needed to Deploy Web Services
• Demo Building and Using StateU XML Web Service

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Building and Using XML Web Services Using Visual
Studio .NET
Creating a Web Service Project
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Building and Using XML Web Services Using Visual
Studio .NET
The Components of a Web Service Project
Built in an Assembly
Discovery Source
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Building and Using XML Web Services Using Visual
Studio .NET
Exposing Web Service Methods
ltWebMethod()gt Public Sub DropClass(ByVal
pStudentID As Integer, _ ByVal
pClassID As String) If Not Enrolled(pStudentID
, pClassID) Then Throw New
Exception(pClassID " is not enrolled") End
If If Examined(pStudentID, pClassID) Then
Throw New Exception(pClassID " was
examined") End If Dim strSQL As String
"DELETE Enrollment WHERE StudentID "
_ pStudentID " AND ClassID '"
pClassID "'" objDat.SetStateU(strSQL) End
Sub
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Building and Using XML Web Services Using Visual
Studio .NET
Creating a Web Service Consumer Project

• Any type of Application can consume Web services
• Windows Applications
• Class Libraries
• Windows Control Libraries
• ASP .NET Web Applications
• ASP .NET Web Services
• Web Control Libraries
• Console Applications
• Windows Services

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Building and Using XML Web Services Using Visual
Studio .NET
Adding a Web Reference
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Building XML Web Services Using .NET Technology
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Building and Using XML Web Services Using Visual
Studio .NET
Viewing a WSDL
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Building XML Web Services Using .NET Technology
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Building and Using XML Web Services Using Visual
Studio .NET
Imported Files
Discovery
WSDL
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Building and Using XML Web Services Using Visual
Studio .NET
Creating a Web Service Proxy and Calling Web
Methods

• Declare a variable as Web service name to create
  a Web service Proxy
• Dim objBiz As New StateU.bizStateU()
• Calling Web methods
• Dim dstTranscript As DataSet
• dstTranscript objBiz.GetTranscript(txtStudentID.
  Text)
• objBiz.AddClass(txtStudentID.Text,
  lstClasses.Text)
• objBiz.DropClass(txtStudentID.Text,
  lstClasses.Text)
• objBiz.TransferClass(txtStudentID.Text,
  From.Text, To.Text)

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Building and Using XML Web Services Using Visual
Studio .NET
Files Needed to Deploy Web Services
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Building XML Web Services Using .NET Technology
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Building and Using XML Web Services Using Visual
Studio .NET
Demo Building and Using StateU XML Web Service
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Conjunction with COM Services

• Introduction to COM Services
• Principal Role of XML Web Services and COM
  Services
• Using XML Web Services with
• COM Application in Local and Global Area
• Demo Building and Using StateU XML Web Service
• and Serviced Components

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Conjunction with COM Services
Introduction to COM Services

• COM is the application infrastructure in a
  multi-user environment that compose of the
  services that enable many users to access the
  application and underlying data at the same time.
• COM Services
• Transactions
• Resource Management
• Just-in-Time(JIT) Activation
• Object Pooling
• Compensating Resource Managers
• Security
• Synchronization
• Loosely Coupled Events
• Queued Components

Core Services
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Conjunction with COM Services
Principal Role of XML Web Services and COM
Services
XML Web Services
COM Services

• Infrastructure of distributed applications
• Transaction Management
• Resource Management
• Enforcing Security

• Supports standard protocol
• Exposing set of functionality against the
  firewall
• Platform independent Services

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Conjunction with COM Services
Using XML Web Services with COM Applications in
Local Global Area
Local Area
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Conjunction with COM Services
Demo Building and Using StateU XML Web Service
and Serviced Components
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Please allow me to omit part of more details, as
it is too long to take up the subject in
full. For more information about XML Web
services and COM services, go to Microsoft
Certified Technical Education Center(CTEC) and
take the course below. 2524 Developing XML Web
Services Using Microsoft ASP .NET 2557 Building
COM Applications Using Microsoft .NET
Enterprise Services
Building XML Web Services Using .NET Technology
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QA
Biz doff_at_feelanet.com msn bpark_at_hanafos.com www.
feelanet.com www.forace.net www.wtime.net
Building XML Web Services Using .NET Technology
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Thanks for your patience!