'NET Overview and Web Services Architecture

1
.NET Overview and Web Services Architecture

• Matt Miller

2
Introduction

• .NET and Web Services Architectures
• What is the .NET vision. How can we build a
  system for this vision.

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Vocabulary

• Web Services
• A model for building applications that can be
  accessed in a distributed environment
• Web Service
• The implementation of a business service that is
  accessible via SOAP or some other standard
• Layer and Tier
• Level of abstraction that separates functionality

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.NET Vision

• Distributed Computing

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N-Tier Architecture
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Presentation Tier

• HTML Browser
• Windows Form
• WAP Phones

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Presentation Logic Tier

• lt_at_ Page Language"C" gt
• lt_at_ Assembly Name"BookStoreServer" gt
• lt_at_ Import Namespace"BookStoreServer" gt
• lthtmlgt
• ltheadgt
• ltscript runat"server"gt
• void logon(Object Source, EventArgs E)
• BookStoreSystem system new BookStoreSystem()
  
• if( system.logon(UserID.Value, Password.Value)
  )
• this.Response.Write( Success )
• lt/scriptgt
• ltbodygt
• ltform id"messageForm" runat"server"gt
• ltinput id"UserID" runat"server" TYPE"text"gt
• ltinput id"Password" runat"server"
  TYPE"text"gt
• ltinput value"Ok" type"submit" runat"server"
  onserverclick"logon"gt

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Proxy Tier
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Business Logic Tier

• Business rules
• Manipulation of data
• Request validation

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Data Access Tier

• ADO
• JDBC

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Data Tier

• SQL Server
• Oracle
• Flat File
• XML File

12
Summary