This course provides you with the knowledge and skills that are required to develop Extensible Markup Language (XML) Web services-based solutions to solve common problems in the distributed application domain. The course focuses on using Microsoft Visual Studio .NET and Microsoft ASP.NET to enable you to build, deploy, locate, and consume Web services.

This course incorporates materials from the Official Microsoft Learning Products (OMLPs):

• 2524 - Developing XML Web Services Using Microsoft ASP .NET.

What You'll Learn

• Explain how Web services solve problems encountered with traditional approaches to designing distributed applications
• Describe the architecture of a Web services-based solution
• Describe the underlying technologies of Web services and explain how to use the Microsoft .NET Framework to implement them
• Implement a Web service consumer by using Visual Studio .NET
• Implement a simple Web service by using Visual Studio .NET
• Publish and deploy a Web service
• Secure a Web service
• Implement caching in a Web service
• Evaluate the trade-offs and issues that are involved in designing a real-world Web service
• Implement nonstandard Web services such as Hypertext Markup Language (HTML) screen scraping and aggregating Web services

Who Needs to Attend

Experienced software developers who have previously built component-based applications

Prerequisites

• Familiarity with C# or Microsoft Visual Basic® .NET
• Programming in C++, Java, or Microsoft Visual Basic
• An understanding of how to read and write XML documents
• Experimented with simple C# applications
• Developed distributed applications by using Visual Basic, Java, or C++

Follow-On Courses

There are no follow-ons for this course.

Course Outline

1. The Need for XML Web Services

• Describing the evolution of distributed applications.
• Identifying the problems with traditional distributed application architectures and technologies.
• Describing Web services and briefly explaining how they address the design problems in traditional distributed applications.
• Listing the alternate options for distributed application development.
• Identifying the kinds of scenarios where Web services are an appropriate solution.

2. XML Web Service Architectures

• Identifying how Web service architectures are a type of service-oriented architecture.
• Describing the elements of a Web service architecture and explaining their roles.
• Describing the Web service programming model.

3. The Underlying Technologies of XML Web Services

• Describing the structures of an HTTP request and response.
• Issuing HTTP POST and GET requests and processing the responses by using the .NET Framework.
• Describing data types by using the XML Schema Definition language (XSD).
• Explaining how to control the way a .NET Framework object is serialized to XML.
• Describing the structures of a Simple Object Access Protocol (SOAP) request and response.
• Issuing a SOAP request and processing the response by using the .NET Framework.

4. Consuming XML Web Services

• Explaining the structure of a Web Service Description Language (WSDL) document.
• Explaining the Web services discovery process.
• Locating service contracts by using Disco.exe.
• Generating Web service proxies by using Wsdl.exe.
• Implementing a Web service consumer by using Visual Studio .NET.
• Invoking a Web service synchronously and asynchronously by using a Web service proxy.

5. Implementing a Simple XML Web Service

• Creating a Web service project.
• Implementing Web service methods, exposing them, and controlling their behavior.
• Managing state in an ASP.NET-based Web service.
• Debugging Web services.

6. Publishing and Deploying XML Web Services

• Explaining the role of UDDI in Web services.
• Publishing a Web service in a UDDI registry by using the UDDI SDK.
• Searching a UDDI registry to locate Web services by using the UDDI SDK.
• Explaining the various options for publishing a Web service on an intranet.
• Explaining some of the options for modifying the default configuration of a Web service.

7. Securing XML Web Services

• Identifying the differences between authentication and authorization.
• Explaining how to use the security mechanisms that Microsoft Internet Information Services (IIS) and Windows provide for authentication.
• Using SOAP headers for authentication in a Web service.
• Using role-based security and code access security for authorization in a Web service.
• Encrypting the communication between a Web service consumer and a Web service.

8. Designing XML Web Services

• Identifying the restrictions that are imposed on data types by the various Web services protocols.
• Explaining how the use of Application and Session state can affect the performance and scaling of Web services.
• Explaining how to use output and data caching to improve Web service performance.
• Implementing caching in a Web service.
• Explaining how asynchronous Web service methods can improve performance.
• Explaining the need for instrumenting Web services.
• Identifying the components of a Web service that can be versioned.
• Explaining how to implement a virtual Web service by using screen scraping.
• Implementing a Web service that uses multiple Web services.
• Identifying the trade-offs in the techniques that are used for exposing aggregated Web services.

9. Global XML Web Services Architecture

• Describe limitations inherent to the specifications with which today's Web services are built.
• Describe the design principles and specifications of Global XML Web services Architecture (GXA).
• Describe Web service application scenarios made possible by Web Services Routing Protocol (WS-Routing) and Web Services Referral Protocol (WS-Referral).
• Explain how to use Web Services Security Language (WS-Security) and Web Services License Language (WS-License) to perform authentication and authorization for Web services.
• Design Web services that anticipate and can leverage the features that GXA will offer when released.