Part I The ASP.NET Runtime Environment in C#.NET

Maker Denso QR Bar Code in C#.NET Part I The ASP.NET Runtime Environment

Part I The ASP.NET Runtime Environment
c# qr code zxing
Using Barcode creator for Visual Studio .NET Control to generate, create QR Code JIS X 0510 image in .NET applications. c# qr code zxing
www.OnBarcode.com
c# zxing qr code reader
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET applications. c# zxing qr code reader
www.OnBarcode.com
Accessing Other HTTP Modules
create barcode c#.net
Using Barcode printer for .NET Control to generate, create barcode image in .NET framework applications. create barcode c#.net
www.OnBarcode.com
barcode scanner api c#
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET applications. barcode scanner api c#
www.OnBarcode.com
The sample just discussed demonstrates how to wire up pipeline events that is, events fired by the HttpApplication object. But what about events fired by other modules The HttpApplication object provides a property named Modules that gets the collection of modules for the current application. The Modules property is of type HttpModuleCollection and contains the names of the modules for the application. The collection class inherits from the abstract class NameObjectCollectionBase, which is a collection of pairs made of a string and an object. The string indicates the public name of the module; the object is the actual instance of the module. To access the module that handles the session state, you need code like this:
asp.net qr code generator open source
Using Barcode encoder for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications. asp.net qr code generator open source
www.OnBarcode.com
.net qr code library
Using Barcode creation for VS .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications. free vb.net barcode library .net qr code library
www.OnBarcode.com
var sessionModule = app.Modules["Session"]; sessionModule.Start += OnSessionStart;
create qr code with vb.net
Using Barcode maker for VS .NET Control to generate, create QR image in .NET framework applications. create qr code with vb.net
www.OnBarcode.com
Barcode Printer In C#
Using Barcode printer for Visual Studio .NET Control to generate, create bar code image in VS .NET applications.
www.OnBarcode.com
As mentioned, you can also handle events raised by HTTP modules within the global.asax file and use the ModuleName_EventName convention to name the event handlers. The name of the module is just one of the settings you need to define when registering an HTTP module.
c# data matrix library
Using Barcode maker for .NET Control to generate, create Data Matrix 2d barcode image in .NET framework applications. c# data matrix library
www.OnBarcode.com
c# calculate upc check digit
Using Barcode maker for Visual Studio .NET Control to generate, create UPC Symbol image in .NET framework applications. c# calculate upc check digit
www.OnBarcode.com
Examining a Real-World HTTP Module
c# barcode code 39
Using Barcode drawer for VS .NET Control to generate, create Code 3/9 image in VS .NET applications. c# barcode code 39
www.OnBarcode.com
Print Leitcode In Visual C#
Using Barcode generation for .NET Control to generate, create Leitcode image in .NET framework applications.
www.OnBarcode.com
The previous example gave us the gist of an HTTP module component. It was a simple (and kind of pointless) example, but it was useful to demonstrate what you can do with HTTP modules in a real application. First and foremost, not all applications need custom HTTP modules. ASP.NET comes with a bunch of built-in modules, which are listed in Table 4-8.
Generate UCC-128 In None
Using Barcode encoder for Font Control to generate, create EAN 128 image in Font applications.
www.OnBarcode.com
java ean 13 generator
Using Barcode generator for Java Control to generate, create EAN13 image in Java applications. java barcode library open source java ean 13 generator
www.OnBarcode.com
TABLE 4-8
UPC-A Supplement 2 Generation In None
Using Barcode creation for Word Control to generate, create UPC-A Supplement 2 image in Microsoft Word applications.
www.OnBarcode.com
pdf417 vb.net
Using Barcode creation for VS .NET Control to generate, create PDF417 image in .NET framework applications. pdf417 vb.net
www.OnBarcode.com
Native HTTP Modules
Paint GS1 DataBar In .NET
Using Barcode drawer for VS .NET Control to generate, create GS1 DataBar Truncated image in .NET framework applications.
www.OnBarcode.com
USS Code 128 Creation In Objective-C
Using Barcode maker for iPhone Control to generate, create Code 128B image in iPhone applications.
www.OnBarcode.com
Description
barcode generator excel 2013
Using Barcode generation for Microsoft Excel Control to generate, create barcode image in Excel applications. barcode generator excel 2013
www.OnBarcode.com
Generating QR Code In .NET
Using Barcode generator for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
www.OnBarcode.com
Manages anonymous identifiers for the ASP.NET application Ensures that the User object is always bound to some identity Verifies that the user has permission to access the given file. Manages Forms authentication Implements output page caching Implements the data retrieval for profile data Manages the retrieval of role information Manages script requests placed through ASP.NET AJAX Manages session state Verifies that the user has permission to access the given URL Implements URL routing Manages Windows authentication
Event
AnonymousIdentificationModule DefaultAuthenticationModule FileAuthorizationModule FormsAuthenticationModule OutputCacheModule ProfileModule RoleManagerModule ScriptModule SessionStateModule UrlAuthorizationModule UrlRoutingModule WindowsAuthenticationModule
4 HTTP Handlers, Modules, and Routing
All these HTTP modules perform a particular system-level operation and can be customized by application-specific code. Because an HTTP module works on any incoming request, it usually doesn t perform application-specific tasks. From an application perspective, an HTTP module is helpful when you need to apply filters on all requests for profiling, debugging, or functional reasons. Let s dissect one of the system-provided HTTP modules, which will also slowly move us toward the next topic of this chapter. Enter the URL-routing HTTP module.
The UrlRoutingModule Class
In ASP.NET 3.5 Service Pack 1, Microsoft introduced a new and more effective API for URL rewriting. Because of its capabilities, the new API got a better name URL routing. URL routing is built on top of the URL rewriting API, but it offers a richer and higher level programming model. (I ll get to URL rewriting and URL routing in a moment.) The URL routing engine is a system-provided HTTP module that wires up the PostResolveRequestCache event. In a nutshell, the HTTP module matches the requested URL to one of the user-defined rewriting rules (known as routes) and finds the HTTP handler that is due to serve that route. If any HTTP handler is found, it becomes the actual handler for the current request. Here s the signature of the module class:
public class UrlRoutingModule : IHttpModule { public virtual void PostResolveRequestCache(HttpContextBase context) { ... } void IHttpModule.Dispose() { ... } void IHttpModule.Init(HttpApplication application) { ... } }
The class implements the IHttpModule interface implicitly, and in its initialization phase it registers a handler for the system s PostResolveRequestCache event.
The PostResolveRequestCache Event
The PostResolveRequestCache event fires right after the runtime environment (IIS or ASP. NET, depending on the IIS working mode) has determined whether the response for the current request can be served from the output cache or not. If the response is already cached,
Copyright © OnBarcode.com . All rights reserved.