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
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 |
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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 |
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