The document discusses ASP.NET web development. It covers ASP.NET's process model which uses its own managed thread pool to asynchronously handle requests. It also discusses ASP.NET's support for various programming languages and file extensions used. Finally, it describes ASP.NET's coding models including the use of code behind files to separate code and content and how runtime compilation works.

1. Copyright © 2005 newtelligence® AG. All rights reserved
Daniel Fisher
Software Engineer, newtelligence® AG
danielf@newtelligence.com
Web Development
IIS & ASP.NET Webservices

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Agenda
 ASP.NET in …
 Process model
 State Management
 Service Tiers & Provider model
 Languages & File Extensions
 Coding model
•WebForms
•Codebehind
•Compilation

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ASP.NET in .NET
SystemServices
Common Language Runtime
Services Framework
ASP.NET
(Web Forms & Web Services)
Windows Forms
Base Data Debug ...

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ASP.NET in IIS
Internet Information Server
InetInfo
HTTP.SYS
kernel mode HTTPlistener
W3SVC App Pool App Pool
Metabase
ConfigMgr
ProcessMgr
W3wp.exe
WebApp
W3wp.exe
WebApp
WebApp

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ASP in IIS (Windows 2003)
Internet Information Server
HTTP.SYS
kernel mode HTTPlistener
App Pool
W3wp.exe
Web Application
CacheHttpModules
HttpHandler

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Process Model
 New process model for ASP.NET and Indigo
 Very flexible activation
 ASP.NET Runtime is managed!
•ISAPI-Filter
 Runs as ASPNET user account
 Asynchronous execution of requests
•Own Thread-Pool
•Threads are not related to IIS Threads
 Multithreaded
•No Apartment-Model
 Alternative Filtering-Model
•HTTP-Modules und -Handlers replace ISAPIFilters
 Cache

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Languages
 VB
 C#
 J#
 C++
 COBOL
 PHP
 etc…

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File Extensions
 ASP.NET related files
•WebForms: *.aspx
 CodeBehind: *.aspx.cs, *.asmx.vb, ...
 Resources: *.aspx.resx
•WebUserControls: *.ascx
•Code: *.cs, *.vb
•MasterPages: *.master
•Skin: *.skin
•RequestHandler: *.ashx
•WebServices: *.asmx
•Configuration: Web.config
•Application: Global.asax und Global.asax.vb

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Coding Models in ASP.NET 1.x
Code Inline Code Behind
System.Web.Services.
WebService
System.Web.Services.
WebService
ASMX ASMX ASMX
Temp.dll Temp.dllMyWeb.dll
Inherits Inherits
Inherits
Runtime
Compiled
Runtime
Compiled
Pre-
Compiled

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Coding Models in ASP.NET 2.0
Code Inline Code Behind
System.Web.Services.
WebService
System.Web.Services.
WebService
ASMX ASMX
Temp.dll Temp.dll
Inherits Inherits
Runtime
Compiled
Runtime
Compiled

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Coding Model
 Reduce Inheritance Complexity
 No need for declaration code
 Code is linked by Visual Studio and the runtime
 Hot Updates (XCopy deployment)
 Full Integration in the .NET Framework
•Consistent programming model, same tools

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Codebehind
 Enable separation of code from content
•Developers and designers can work
independently
WebService.asmx
WebService.asmx.cs

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ASP.NET 1.x Codebehindusing System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Services;
namespace WebApplication1 {
public class Service : System.Web.Services.WebService{
public Service()
{
InitializeComponent();
}
private IContainer components = null;
private void InitializeComponent()
{
}
protected override void Dispose( bool disposing )
{
if(disposing && components != null)
{
components.Dispose();
}
base.Dispose(disposing);
}
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
}
}

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ASP.NET 2.0 CodeBehind
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
[WebMethod]
public string HelloWorld() {
return "Hello World";
}
}

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Runtime compilation
 Inline Code
 The Code Directory
•holds uncompiled classes
•Compilation at runtime
 %SystemRoot%Microsoft.NETFramework
X.X.XXX
Temporary ASP.NET Files

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Runtime Compilation Explained
Request
Parse Generate
Response
Request
Instantiate
Response
Codebehind
Instantiate,
Process and
Render
Compile
* .ASMX
* .ASMX

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Thank You
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