1. Configuring .NET Web Applications
MIS Professor Sandvig
5/25/2019
Configuring .NET Web Applications
MIS 424
Professor Sandvig

2. MIS 324 -- Professor Sandvig
5/25/2019
Today
Why Web Applications?
IIS
Role in handing a request
IIS Applications
.NET
Request Handling
Global.asax
Configuration files
Machine.config
Web.Config

3. MIS 324 -- Professor Sandvig
5/25/2019
Why Applications?
Dark ages (pre-2003)
Server crashes not unusual
Single failure bring down whole system
Worse yet:
Memory leaks
Cause IIS hang
Stop serving pages
Required manual intervention (reboot)

4. MIS 324 -- Professor Sandvig
5/25/2019
Why Applications?
Today
Applications still crash
Applications are compartmentalized
OS handles gracefully
System rarely affected
OS monitors application health
Recycles unhealthy processes
Result: system stable & reliable

5. MIS 324 -- Professor Sandvig
5/25/2019
IIS Applications
Folders may be configured as “Applications”
IIS configuration interface

6. IIS Applications
Many configuration options

7. IIS Applications
Each application is assigned to an Application Pool

8. IIS Application Pools
Each application pool has a unique Windows process
Specify error handling, timeouts, etc. for each

9. MIS 324 -- Professor Sandvig
5/25/2019
Request Handling
Source:

10. .NET Application When URL points to IIS Application
IIS passes request to .NET
.NET checks configuration files:
Located in root folder
global.asax
Application event handler
web.config
Application configuration settings

11. MIS 324 -- Professor Sandvig
5/25/2019
Global.asax
Handles application & session events
15+ events
Application_start
Application_error
Session_start
Located in root folder of application
Triggered each page request

12. MIS 324 -- Professor Sandvig
5/25/2019
Global.asax
Configures MVC application:
public class WebApiApplication : System.Web.HttpApplication {
protected void Application_Start()
AreaRegistration.RegisterAllAreas();
GlobalConfiguration.Configure(WebApiConfig.Register);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles); }

13. MIS 324 -- Professor Sandvig
5/25/2019
web.config
Located in root folder
XML format
Many settings:
Connection strings
Authentication
Debugging
.NET version
Exception handling
Timeouts
Others…

14. .Net Application Example
MIS Professor Sandvig
5/25/2019
.Net Application Example
Example:
Create new application on server

15. MIS 324 -- Professor Sandvig
5/25/2019
Summary
Application Objectives:
Reliability
Convenient Configuration
Flexibility
Security
IIS
Handles requests
Passes to .NET MVC
Configuration
Global.asax
Web.config