Sometimes
their is a need to disable the back button of the browser for security
reasons so as to prevent the user from navigating between the pages by
using the browser arrow buttons.
SecondPage.aspx
Now run the application, the first page will look like the following:
Problem
Suppose
their is a login page, when i login into the application, the page will
be redirected to the page where I perform all my tasks, after doing all
my work, I will logout from the application and the page again will get
redirected to the Login page, at that time when i will click on the
browser next arrow button it will allow me to show the next page that i
have earlier used to Login without the need of new login; so to avoid
this problem we need to disable the browser button.
Now let us see how to do it
open VS --create New Web site-add two web page.
After adding the two web pages, write the following javascript code.
<script type ="text/javascript"> window.onload = window.history.forward(0); //calling function on window on-load </script>
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <script type ="text/javascript"> windowwindow.onload = window.history.forward(0); </script> <title></title> </head> <body bgcolor="silver"> <form id="form1" runat="server"> <h4>This is First Page</h4> <br /><br /><br /> <div> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Goto Second Page" /> </div> </form> </body> </html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <script type ="text/javascript"> windowwindow.onload = window.history.forward(0); </script> <title></title> </head> <body bgcolor="silver"> <form id="form1" runat="server"> <div> <h4>This is second Page</h4> </div> </form> </body> </html>
Now
try to click on the above browser navigation button, now click on the
above arrow button. here you will see that it will not directly allow
you to navigate on the first page and from the first page to the second
page.
Summary
It's a
very small trick but it will play an important role in the security of
the application, I hope this blog is useful, if you have any suggestion
then please suggest me.
Post a Comment