How to disable back button in aspx?

Question

Here is my code:

protected void btnresult_Click(Object sender, EventArgs e)
{
   Button btn = (Button)(sender);
   Response.Write("<script>");
   Response.Write("window.open('studentresult.aspx?id=" + btn.CommandArgument + "','_blank')");
   Response.Write("</script>");
}

My home page studententry.aspx

In my home page, when I click result button, it goes to new window page and it shows student result.

But after that I will take a look at home page, it shows back button on the top of url address bar.

So I click the back button, again it goes to new window page and shows student result.

May I know, why the back button is active when I click result button?

above code is targeting blank so its opening new tab of browser, so when you open new tab its back button is disabled by default This might guide you http://stackoverflow.com/a/19971975/3583859 — Vijay Kumbhoje, Dec 09 '15 at 11:48
In new tab is disabled by default.. but in my home getting enable back button right... — pcs, Dec 09 '15 at 12:11
@VijayKumbhoje: actually i m struggling how to add code in my existing code from your link.. — pcs, Dec 09 '15 at 12:27

score 0 · Answer 1 · answered Dec 09 '15 at 12:33

Write below method on your page code behind file and call it on page load event.

public void disablebrowserbackbutton()
{
 HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
 HttpContext.Current.Response.Cache.SetNoServerCaching();
 HttpContext.Current.Response.Cache.SetNoStore();
}

Add below Script in your client side file (html) inside <head> tag or if you using Masterpages before contentPlaceHolder

<script type="text/javascript">
function preventBack() {
    window.history.forward();
}
setTimeout("preventBack()", 0);
window.onunload = function() {
    null
};

How to disable back button in aspx?

1 Answers1