Problem facing while using javascript code in asp.net

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Here is the code i used in my page.

XML

<script type="text/javascript">

window.onbeforeunload = function () {
    if (_clickedAnchor) {
        _clickedAnchor = false;
        return "Out Put Message";
    }
}

_clickedAnchor = false;

jQuery(document).ready(function () {
    jQuery("a").click(function () {
        _clickedAnchor = true;
    });
});

</script>

Error:-JavaScript runtime error: 'jQuery' is undefined

Posted 27-Jan-14 22:43pm

ntitish

Updated 27-Jan-14 22:46pm

v2

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Kornfeld Eliyahu Peter · Answer 1 · 2014-01-27T23:06:00

Solution 1

As it reads = you have no jQuery.
First add jQuery to your project using NuGet, than add jQuery to your page using <script></script> tag...

Add reference to jQuery package...
1. right click your project
2. select Manage NuGetPackage
3. select online
4. search for jQuery
5. hit install

Add jQuery to your page...
In the <head> of your page add line like this:

<script src="/js/jquery-1.7.1.js" type="text/javascript"></script>

Exact path and version can be different...

Posted 27-Jan-14 23:06pm

Kornfeld Eliyahu Peter

Updated 27-Jan-14 23:16pm

v2

Comments

ntitish 28-Jan-14 5:09am

how to add jquery to my project sir....

Kornfeld Eliyahu Peter 28-Jan-14 5:16am

See updated solution

ntitish 28-Jan-14 5:41am

sir i had one doubt actually in that onbeforeunload function i want to show one alert and i want to stop redirecting to other page is it possible......

My code is like below

<script type="text/javascript">

var Level = '<%=Session["UserLevel"]%>'
if (Level == 3) {
var id = '<%=Session["uid"]%>';
if (id == 1) {

function get1() {

window.onbeforeunload = null;
}
window.onbeforeunload = confirmExit;
function confirmExit() {
alert("Please save offiec referral Befor you leave from this page");

}
}
}

</script>

Kornfeld Eliyahu Peter 28-Jan-14 5:45am

If you want to stop then do return false from your confirmation function...

ntitish 28-Jan-14 5:48am

if i written like that return false it is showing two popups one is simple alert and one more popup with options "leave this page" or "stay on this page"...but i need only alert...

Kornfeld Eliyahu Peter 28-Jan-14 5:53am

Yes. My wrong.
You can't replace the default dialog displays on onbeforeunload. You only can modify the text it displays...
So do like this
return('Show my message...');

ntitish 28-Jan-14 5:58am

actually i want only simple alert that to with option "OK" in my functionality i don't want to let the user go out until he fill the form......is it possible sir...