Why use handlers in asp.net

Register this handler by adding the following text in the web. Right Click and Select Properties. Select Home Directory and click on Configuration. The Following Screen will appear:. Click on Add and give executable path and new extension and click OK. The sensitive files can be protected by Http Forbidden Handler. The Database driven web sites using MS Access, the. To protect the. In the Web. Config file, Add this Http handler section:.

Can you change a Master Page dynamically at runtime? What is cross-page posting in ASP. How to redirect a page in asp. How to register custom server control on ASP. NET page? How do you validate Input data in Asp. What's the difference between ViewData and ViewBag? Difference between Response. Redirect and Server. Transfer What is the function of the CustomValidator control? Define RequiredFieldValidator?

Net What are the major events in Global. BeginRequest : Request has been started. If you need to do something at the beginning of a request for example, display advertisement banners at the top of each page , synchronize this event. AuthenticateRequest : If you want to plug in your own custom authentication scheme for example, look up a user against a database to validate the password , build a module that synchronizes this event and authenticates the user how you want to.

AuthorizeRequest : This event is used internally to implement authorization mechanisms for example, to store your access control lists ACLs in a database rather than in the file system. Although you can override this event, there are not many good reasons to do so. ResolveRequestCache : This event determines if a page can be served from the Output cache. If you want to write your own caching module for example, build a file-based cache rather than a memory cache , synchronize this event to determine whether to serve the page from the cache.

AcquireRequestState : Session state is retrieved from the state store. If you want to build your own state management module, synchronize this event to grab the session state from your state store. ReleaseRequestState : Session state is stored back in the state store.

If you are building a custom session state module, you must store your state back in your state store. UpdateRequestCache : This event writes output back to the Output cache. If you are building a custom cache module, you write the output back to your cache. EndRequest : Request has been completed. All handlers implement the IHttpHandler interface, which is located in the System.

Web namespace. If you create a custom handler with a file name extension of. The advantage of using an extension other than. It can be declared at the computer, site, or application level. Subdirectories inherit these settings. Administrators use the tag directive to configure the section. Use the following syntax for the section handler:.