Solved

To fire one event upon going to previous page

Posted on 2014-03-02
11
43 Views
Last Modified: 2015-09-10
Hi,

We do press Alt-Left Arrow, to locate to previous web page. Upon doing that, can we fire one event, before going to the previous page?
0
Comment
Question by:HuaMinChen
  • 6
  • 5
11 Comments
 
LVL 27

Expert Comment

by:Sammy
ID: 39899712
The only event is window.onbeforeunload
however, this event is triggered in many other cases, when user try to exit the page or close the browser or event navigate to a different page.

window.onbeforeunload = function() { return "Bye."; };

there has always been lots of debates about using this functionality on browsers,
here is how to *disable it* http://viralpatel.net/blogs/disable-back-button-browser-javascript/

and more info http://www.hunlock.com/blogs/Mastering_The_Back_Button_With_Javascript
0
 
LVL 10

Author Comment

by:HuaMinChen
ID: 39899743
Many thanks.
Within this
    ...
    <script type="text/javascript">
        window.onbeforeunload=function {

        }
        ...

Open in new window

I want to execute one event from code-behind. how?
0
 
LVL 27

Expert Comment

by:Sammy
ID: 39899756
This is a client event, the only way to execute it is by sending back
in your aspx page create a function like so
<script type="text/javascript">
 window.onbeforeunload = myFunction;
function myFunction()
{
   // your functionality here
}
</script>

Open in new window

and in your page load add this

Page.ClientScript.RegisterStartupScript(this.GetType(),"CallMyFunction","myFunction()",true);

Open in new window


I am outta here Good luck :-)
0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 
LVL 10

Author Comment

by:HuaMinChen
ID: 39899767
No, I mean within func1 below

    <script type="text/javascript">
        window.onbeforeunload=func1;
        function func1() {

        }
        ...

Open in new window

I want to execute/call one code-behind event.
0
 
LVL 27

Expert Comment

by:Sammy
ID: 39899797
Change myFuction to func1 in the code above.
The line start with Page is code behind and you can use it in your page load event
0
 
LVL 10

Author Comment

by:HuaMinChen
ID: 39899820
I have one event which is existing within Code-behind. How to call it within func1 below?

    <script type="text/javascript">
        window.onbeforeunload=func1;
        function func1() {

        }
        ...

Open in new window

0
 
LVL 27

Accepted Solution

by:
Sammy earned 140 total points
ID: 39899871
You can't call code behind from a client code.
You will have to call the client code from your code behind.
0
 
LVL 10

Author Comment

by:HuaMinChen
ID: 39899902
Sorry, I do want to call one code-behind event within func1.
0
 
LVL 27

Expert Comment

by:Sammy
ID: 39899906
Good luck with that.
0
 
LVL 10

Author Comment

by:HuaMinChen
ID: 39899921
Within OnClick event of the button of a Panel, we can call one code-behind event. why can't we do the same within func1?
0
 
LVL 10

Author Comment

by:HuaMinChen
ID: 39902339
Any other help? Thanks
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Since I wrote the original article about Handling Date and Time in PHP and MySQL (http://www.experts-exchange.com/articles/201/Handling-Date-and-Time-in-PHP-and-MySQL.html) several years ago, it seemed like now was a good time to updat…
This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question