Web Service

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It gives whole detail about web services.

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Presentation Transcript

Introduction to Web Services Srinath VasireddySupport ProfessionalDeveloper SupportMicrosoft Corporation : 

Introduction to Web Services Srinath VasireddySupport ProfessionalDeveloper SupportMicrosoft Corporation

Agenda : 

2 Agenda What is a Web service? Technologies used XML, SOAP, WSDL, DISCO, and UDDI Walkthrough creating a Web service Walkthrough creating a Web service client References Q&A

What is a Web Service? : 

3 What is a Web Service? A programmable application component that is accessible via standard Internet protocols Web page with functions Available for a variety of clients Examples: stock quotes, traffic conditions, calculators, news, weather, et cetera

Technologies Used : 

4 Technologies Used Standard way to represent data XML (and XML schemas) Common, extensible message format SOAP Common, extensible contract language Web Services Description Language (WSDL) Way to discover site services Disco Way to discover service providers Universal Description, Discovery, and Integration (UDDI)

XML : 

5 XML Extensible Markup Language Language for describing documents with structured data Industry standard XML Schemas – XSD XML based Language for describing data types For more information, read: http://msdn.microsoft.com/library/en-us/dnwebsrv/html/xmloverchap2.asp

SOAP : 

6 SOAP A simple, XML-based protocol for exchanging structured and type information on the Web Industry standard Lightweight and XML-based protocol Can support different protocols and formats: HTTP, SMTP, and MIME SOAP message For more information, read: http://msdn.microsoft.com/soap/

WSDL : 

7 WSDL It is an XML document describing Web services Define data types (XSD) Define messages in terms of types Define bindings to transport protocol, message format SOAP 1.1, HTTP Get/Post, MIME Define services as collections of ports WSDL.exe For more information read: http://msdn.microsoft.com/library/en-us/dnwebsrv/html/wsdlexplained.asp

DISCO : 

8 DISCO Document Discovery A client finds a particular Web services by discovery Document discovering services at a particular URL Document is in XML format Document has .disco and .vsdisco extensions Disco.exe

UDDI : 

9 UDDI Universal Description, Discovery, and Integration Enables businesses to publish and discover information about who provides what services Specification for distributed Web service registries: white pages, yellow pages, and green pages Builds on HTTP, XML, and SOAP For more information, read: http://msdn.microsoft.com/library/en-us/dnexxml/html/xml12182000.asp http://www.uddi.org/about.html

Web Services Platform : 

10 Web Services Platform ASP.NET ATL Server .NET remoting Microsoft® SOAP Toolkit

ASP.NET Web Service : 

11 ASP.NET Web Service Leveraging existing ASP developers Easy to build, deploy, and administer as a Web application File extension is .asmx End point is represented by URL

Creating a Web Service (1) : 

12 Creating a Web Service (1) Open Microsoft Visual Studio® .NET Select the language Select the project type: ASP.NET Web Service

Creating a Web Service (2) : 

13 Creating a Web Service (2) .asmx and .asmx.cs Web.config Global.asax WebService1.vsdisco

Creating a Web Service (3) : 

14 Creating a Web Service (3) Inside Service1.asmx <%@ WebService Language="c#" Codebehind="Service1.asmx.cs" Class="WebService1.Service1" %>

Creating a Web Service (4) : 

15 Creating a Web Service (4) Inside Service1.asmx.cs Add WebService attribute’s Namespace property [WebMethod] public string HelloWorld() { return "Hello World"; } [WebService(Namespace="http://localhost/webservice1/")] public class Service1 : System.Web.Services.WebService Uncomment the following code:

Creating a Web Service (5) : 

16 Creating a Web Service (5) Compile the Web service

Creating a Web Service (6) : 

17 Creating a Web Service (6) Run the Web service

Creating a Web Service Client (1) : 

18 Creating a Web Service Client (1) Create a Microsoft Visual C#™ console application

Creating a Web Service Client (2) : 

19 Creating a Web Service Client (2) Add Web reference (1)

Creating a Web Service Client (3) : 

20 Creating a Web Service Client (3) Add Web reference (2)

Creating a Web Service Client (4) : 

21 Creating a Web Service Client (4) Proxy file is created: Reference.cs

Creating a Web Service Client (5) : 

22 Creating a Web Service Client (5) Client code using System; namespace ConsoleApplication1 { class Class1 { [STAThread] static void Main(string[] args) { localhost.Service1 wsproxy = new localhost.Service1(); Console.WriteLine(wsproxy.HelloWorld()); } } }

Creating a Web Service Client (6) : 

23 Creating a Web Service Client (6) Run the Web service client

Summary : 

24 Summary What is a Web service? Technologies used XML, SOAP, WSDL, DISCO, and UDDI Walkthrough of creating a Web service Walkthrough of creating a Web service client Start building Web services today!

References : 

25 References Programming the Web with XML Web services Visual Studio .NET Help ms-help://MS.VSCC/MS.MSDNVS/vsent7/html/vxconProgrammableWebServices.htm XML and SOAP Serialization Visual Studio .NET Help ms-help://MS.VSCC/MS.MSDNVS/cpguide/html/cpconserialization.htm Web Services Community Go to http://msdn.microsoft.com/newsgroups/managed/default.asp On left frame, drill down to .NET Development > Framework > dotnet.framework.aspnet.webservices

Slide 26: 

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