CS603 Microsoft .NET

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CS603Microsoft .NET

• April 8, 2002

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What is .NET?

• Language for distributed computation
• C, VB.NET, JScript
• Protocols
• SOAP, HTTP
• Run-time environment
• Common Language Runtime (CLR)
• ActiveDirectory
• Web Servers (ASP.NET)

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COM/DCOM ? .NET

• DCOM
• IDL
• Name, Monikers
• Registry / ActiveDirectory
• C, Visual Basic
• DCE RPC
• DCOM Network protocol (based on DCE standards)

• .NET
• Web Services Description Language (WSDL)
• DISCO (URI grammar)
• Universal Description Discovery and Integration
  (UDDI)
• C, VB.NET
• SOAP
• HTTP (presumed ubiquitous), SMTP (!?)

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How .NET works

• Query UDDI directory to get service location
• Query service to get WSDL (interface
  specification)
• Build call (XML) based on WSDL spec.
• Make call using SOAP
• Parse XML results based on WSDL spec.

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Programming framework ASP.NET

• Integrated environment
• Web server application deployment
• Compiler Just-in-time compilation
• Development tools
• Implements Common Language Runtime
• Base class library
• Looks like a web server
• Programs stored/executed anywhere in hierarchy

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Building .NET services

• ASP.NET
• Manages compilation, run-time system,
  registration, etc.
• Hello.asmx
• lt_at_ WebService Language"C" ClassHello" gt
• using System
• using System.Web.Services
• public class Hello WebService
• WebMethod
• public String SayHello(String from)
• Return "Hello, from
• Place in desired location of ASP.NET directory
  structure
• Gives URL to execute

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Alternative Forms-based Development

• File test.aspx
• lt_at_ Page Language"C"gt
• lthtmlgt ltbodygt
• ltform action"intro2.aspx" method"post"gt
• ltpgt Name ltinput id"Name" typetextgt
• Category ltselect id"Category"
  size1gtltoptiongtpsychologylt/optiongtltoptiongtbusine
  sslt/optiongt
• lt/selectgt lt/pgt
• ltinput typesubmit value"Lookup"gt
• ltpgt
• lt for (int i0 i lt8 i) gt
• ltfont size"ltigt"gt Welcome to ASP.NET lt/fontgt
  ltbrgt
• lt gt
• lt/pgt lt/formgt
• lt/bodygt lt/htmlgt

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Configuration / Settings

• Configuration parameters
• Security
• Language
• Compilation options
• Session vs. sessionless
• Caching
• Etc.
• Written as XML in file web.config
• Applies recursively to programs in directory
  containing web.config

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Type System

• Primitive types
• Enum, Arrays, Structs
• Classes (public fields/properties)
• DataSet
• Tables
• Schema
• XmlNode (XML fragment)

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DataSets

• lt_at_ WebService Language"C" Class"DataService"
  gt
• using System
• using System.Data
• using System.Data.SqlClient
• using System.Web.Services
• public class DataService
• WebMethod
• public DataSet GetTitleAuthors()
• SqlConnection myConnection new
  SqlConnection("server(local)\\NetSDKdatabasepub
  sTrusted_Connectionyes")
• SqlDataAdapter myCommand1 new SqlDataAdapter
  ("select from Authors", myConnection)
• SqlDataAdapter myCommand2 new
  SqlDataAdapter("select from Titles",
  myConnection)
• DataSet ds new DataSet()
• myCommand1.Fill(ds, "Authors")
• myCommand2.Fill(ds, "Titles")
• return ds

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Sessions

• Session language-level access to cookies
• WebMethod(EnableSessiontrue)
• public String UpdateHitCounter()
• return Your access number " Session"HitCount
  er"
• Application Stored state of server
• WebMethod
• public String UpdateHitCounter()
• return Total access number "
  Application"HitCounter"

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Security

• Authentication
• Windows
• Passport
• Forms-based authentication (cookie-based, login
  page)
• Access Control
• Access Control List on file
• Check against URL
• Configured using application configuration file
• ltconfigurationgt
• ltsystem.webgt
• ltauthentication mode"Forms"/gt
• lt/system.webgt
• lt/configurationgt
• Can run either as self or impersonate caller

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Tools

• Visual language environments
• VB.NET
• C
• Tracing
• Page-level Debug statements written to special
  section of output web page
• Application-level http//.../HelloWorld/trace.ax
  d
• Debugging Enable in configuration
• ltcompilation debugtrue /gt
• Breakpoint/stepping debugger run when service
  called

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Announcements

• Monday, April 8, 330, CS 101
• David Holmes
• Threads, concurrency and synchronization in Java
• Monday, April 15, 330, CS 101
• Philip McKinley
• RAPIDware Framework for adaptability in the
  face of error in distributed systems