How to use HttpHandler using ASP.NET 2.0 and VB.NET

This example demonstrates how to use HttpHandler technology using Asp.Net2.0 and VB.NET

This example demonstrates how to use HttpHandler technology using Asp.Net2.0 and VBNet.

This tutorial only using the default namespace. The System namespace contains the EventHandler.

HttpHandler is class that implement the IHttpHandler and IHttpAsyncHandler interfaces. This section describes how to create and register HttpHandler and provides examples of a synchronous handler, an asynchronous handler, and a handler factory.

First, you need to create a classlibrary HttpHandlerDLLVB. The code as follows:

Imports System Imports System.Collections.Generic Imports System.Text Imports System.Web Imports System.Web.SessionState Namespace HttpHandlerDLLVB Public Class MyHttpHandlerVB Implements IHttpHandler, IReadOnlySessionState Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable Get Return True End Get End Property Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest context.Response.Write("<h1><b>HttpHandler Test</b></h1>") context.Session("Test") = "Invoke a session in HttpHandler." context.Response.Write((context.Session("Test") + "<br>")) context.Response.Write("<a href='HttpHandlerVB.aspx'><b>return</b></a>") End Sub End Class End Namespace

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Then create a website project and reference classlibrary  HttpHandlerDLLVB.dll.

At last configure your web.config as follows.

<httpHandlers> <add verb="*" path="ViewHttpHandler.aspx" type="HttpHandlerDLLVB.HttpHandlerDLLVB.MyHttpHandlerVB,HttpHandlerDLLVB"/> </httpHandlers>

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The front end HttpHandlerVB.aspx page looks something like this:

<a href="ViewHttpHandler.aspx">Test HttpHandler</a></p> </div>

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The flow for the code behind page is as follows.

Partial Class _Default Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load ASP.NET Tutorials End Sub End Class

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