BCI3023 BCI3063

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.NET Technology

• BCI3023 / BCI3063
• CURRENT ISSUES IN ICT
• CHAPTER 3 MOBILE COMPUTING

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What Is .NET?

• .NET is the Microsoft Web services strategy to
  connect information, people, systems, and devices
  through software.
• Integrated across the Microsoft platform, .NET
  technology provides the ability to quickly build,
  deploy, manage, and use connected,
  security-enhanced solutions with Web services.

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• .NET-connected solutions enable businesses to
  integrate their systems more rapidly and in a
  more agile manner and help them realize the
  promise of information anytime, anywhere, on any
  device.
• The Microsoft platform includes everything a
  business needs to develop and deploy a Web
  service-connected IT architecture.

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What are the Benefits of .NET?

• .NET technologies use Web services to help
  enhance the computing experience with highly
  integrated communications and information.
  Because .NET includes the core technologies for
  building Web services, it benefits
  everyone individual users, organizations, and
  developers.

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• .NET benefits organizations by helping them get
  the most out of their existing technology
  investments while creating new ways to implement
  powerful, cost-effective information technology
  that will meet future needs. .NET technologies
  and Web services can be used to integrate even
  the most disparate computing environments. .NET
  frees organizations from the confines of
  proprietary technology, providing the flexibility
  and scalability that can help organizations
  connect their existing IT systems and build a
  foundation for the next wave of computer
  technology. .NET and Web services can help
  organizations lower operating costs by helping
  connect systems increase sales by helping
  employees access the right information when and
  where they need it integrate services and
  applications with customers and partners and
  lower the costs of information technology with
  tools that help developers quickly create new
  solutions to address business issues.

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• .NET benefits individuals by helping provide a
  more personal and integrated computing
  experience. .NET-enabled computing is centered on
  the usernot on the features of the software or
  hardware. The user's experience becomes very
  customizable and provides integrated data and
  customized interactions that work well with a
  wide range of computing hardware, such as Pocket
  PCs, Smartphones, laptops, and other devices. The
  .NET-based experience enhances the mobile
  computing experience so user's can get their
  information regardless of their location. For
  example, it can take place on a desktop computer,
  in the car on a Smartphone, or at the store on a
  Pocket PC.

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• .NET benefits developers by providing a tightly
  integrated set of tools for building and
  integrating Web services. Visual Studio .NET and
  the .NET Framework provide comprehensive
  development platforms that offer the best,
  fastest, and most cost-effective way to build Web
  services. With Visual Studio .NET and the .NET
  Framework, developers can take advantage of a
  programming model designed from the ground up for
  creating Web services in a highly productive,
  multilanguage environment. With scalable,
  high-performance execution, the .NET tools allow
  developers to use existing skills to create a
  wide range of solutions that work across a broad
  array of computing devices. .NET also provides a
  foundation for building Service Oriented
  Architectures (SOA).

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What Are Web Services?

• Web services are small, reusable applications
  that help computers from many different operating
  system platforms work together by exchanging
  messages.
• Developer opinion -gtself-describing software
  modules, semantically encapsulating discrete
  functionality, wrapped in and accessible via
  standard Internet communication protocols like
  XML and SOAP.

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• Business leader -gt are an approach that helps the
  business connect with its customers, partners,
  and employees. They enable the business to extend
  existing services to new customers. They help the
  business work more efficiently with its partners
  and suppliers. They unlock information so it can
  flow to every employee who needs it. They reduce
  development time and expense for new projects.
  You'll hear less about what Web services are and
  more about what they enable the business to do.
• Web services are based on industry protocols that
  include XML (Extensible Markup Language),
  SOAP (Simple Object Access Protocol), and
  WSDL (Web Services Description Language). These
  protocols help computers work together across
  platforms and programming languages.

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Benefits of Web Services

• By enabling applications to share data across
  different hardware platforms and operating
  systems, Web services provide many benefits,
  including
• Opening the door to new business opportunities
  by
• making it easy to connect with partners.
• Delivering dramatically more personal,
  integrated
• experiences to users through the new breed
  of smart
• devicesincluding PCs.
• Saving time and money by cutting development
  time.
• Increasing revenue streams by enabling
  businesses to
• easily make their own Web services available
  to others.

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Connecting Applications through Web Services

• Web services are revolutionizing how applications
  talk to other applicationsor, more broadly, how
  computers talk to other computersby providing a
  universal data format that lets data be easily
  adapted or transformed.
• Based on XML, the universal language of Internet
  data exchange, Web services can communicate
  across platforms and operating systems,
  regardless of the programming language in which
  the applications are written.

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Web Services Use Industry-Standard Protocols

• Web services are invoked over the Internet by
  means of industry-standard protocols including
  SOAP XML and Universal Description, Discovery,
  and Integration (UDDI). They are defined through
  public standards organizations such as the World
  Wide Web Consortium (W3C).
• SOAP is an XML-based messaging technology
  standardized by the W3C, which specifies all the
  necessary rules for locating Web services,
  integrating them into applications, and
  communicating between them. UDDI is a public
  registry, offered at no cost, where one can
  publish and inquire about Web services.

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What are Web Services Enhancements for Microsoft
.NET (WSE)?

• WSE is an add-on to Microsoft Visual Studio .NET
  and the Microsoft .NET Framework that helps
  developers build greater security features into
  Web services using the latest Web services
  protocol specifications and standards. With WSE
  2.0 developers can create security-enhanced
  connected systems that help improve business
  processes withinand beyondcorporate trust
  boundaries and create new revenue-generating
  opportunities.

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What is a Smart Client?

• Smart clients are client applications that
  consume Web services and reside on user hardware
  such as desktop PCs, laptops, Pocket PCs, and
  Smartphones. They are easily deployed and managed
  and provide an adaptive, responsive, and rich
  interactive experience by taking advantage of the
  computing resources on the device and
  intelligently connecting to distributed data
  sources.

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What is .NET Passport?

• .NET Passport is a Web-based service that is
  designed to make signing in to Web sites fast and
  easy. Passport enables participating sites to
  authenticate a user with a single set of sign-in
  credentials, alleviating the need for users to
  remember numerous passwords and user names.

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What are the Current Microsoft Products and
Technologies That Use .NET?

• Microsoft .NET provides everything that is needed
  to develop and deploy a Web service-based IT
  architecture servers to host Web services
  development tools to create Web services
  applications to use them and a network of more
  than 35,000 Microsoft partners to help
  organizations deploy and manage them. .NET
  technologies are supported throughout the family
  of Microsoft products, including the Windows
  Server System, the Windows XP desktop operating
  system, and the Microsoft Office System. And .NET
  technologies will play an even larger role in
  future versions of Microsoft products.

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Who is Using .NET?

• Organizations worldwide are implementing .NET
  technologies and Web services to create connected
  businesses and to help individuals communicate
  and collaborate more effectively. For example,
  Honeywell, GlaxoSmithKline, Sony, Dollar Rent A
  Car, Farmers Insurance, and the United States
  Postal Service are just a few of the well-known
  names that are using .NET. 

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Working With XML Web Services

• The ASP.NET page framework also serves as a
  framework for XML Web services in managed code.
  As such, XML Web services can access the many
  features of the .NET Framework, such as
  authentication, caching, and state management.
  Developers are then free to focus on creating or
  accessing XML Web services without needing to
  write infrastructure code.
• In the ASP.NET application model, Web pages
  intended for the browser use the .aspx file
  extension. To differentiate XML Web services from
  regular ASP.NET pages, XML Web services use the
  .asmx extension.
• XML Web services consist of an XML Web service
  entry point and the code that implements the XML
  Web service functionality. In ASP.NET, the .asmx
  file serves as the addressable entry point for
  the XML Web service. It references code in
  precompiled assemblies, a code-behind file, or
  code contained in the .asmx file itself.

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• There are two fundamental roles when working with
  XML Web services
• Creating an XML Web service When you create an
  XML Web service, you are creating an application
  that exposes functionality to XML Web service
  clients.
• Accessing an XML Web service When you access an
  XML Web service, your client application locates,
  references, and uses the functionality contained
  within that XML Web service.
• XML Web services can be either stand-alone
  applications or subcomponents of a larger Web
  application. The minimum requirement is that the
  client must be able to send messages to the XML
  Web service.