I have a page where a javascript will be triggered when the user closes the browser tabs / browser window. Language is in c# thanks.
im using window.onbeforeunload, something along the line like this:
<script type="text/javascript">
window.onbeforeunload = myFunction;
function myFunction()
{
//call my function here
}
the code behind function will be a simple function for now, so no input parameters or return value are needed. So i'll just like to know how to call my function (eg: public void callMyFunction())
I have a page where a javascript will be triggered when the user closes the browser tabs / browser window. Language is in c# thanks.
im using window.onbeforeunload, something along the line like this:
<script type="text/javascript">
window.onbeforeunload = myFunction;
function myFunction()
{
//call my function here
}
the code behind function will be a simple function for now, so no input parameters or return value are needed. So i'll just like to know how to call my function (eg: public void callMyFunction())
Share Improve this question asked Apr 29, 2010 at 10:15 newNamenewName 855 silver badges8 bronze badges 5- 2 I think you're confused here... javascript code runs in the browser (client) and C# code runs in the server. You can't call C# code from javascript. At most, you could call a webservice exposed on the server via an AJAX call. – axel_c Commented Apr 29, 2010 at 10:19
- 1 Or use Page Methods. Good tutorial: singingeels./Articles/Using_Page_Methods_in_ASPNET_AJAX.aspx – Joop Commented Apr 29, 2010 at 10:35
- @axel_c~ What makes you think that you can't call c# code from javascript? I've done it many times.. Just call button.click() from your javascript and be suprised! – Pabuc Commented Jan 5, 2011 at 7:27
- @Pabuc that's triggering a client-side event that happens to post back to the server and execute C# code, not directly calling C# code from javascript. It's a different thing. – axel_c Commented Jan 5, 2011 at 15:10
- well.. Then you should have said "You can't write C# code into javascript function". – Pabuc Commented Jan 5, 2011 at 15:17
3 Answers
Reset to default 3There are variety mechanisms to call your code-behind function(s). You could use an Ajax Call, Page Methods, ASP.NET Client Callbacks, or even trigger a code-behind handler using an invisible ASP.NET button.
Try the sample code below:
<html>
<head>
<script src="scripts/jquery-1.4.4.min.js" type="text/javascript"></script>
<script type="text/javascript" language="javascript">
windown.OnUnload(){ function(){ $("#Btn_Click").click();}};
</script>
</head>
<body>
...
<asp:Button ID="Btn_Click" runat="server" Text="ButtonClick" onClick="Btn_Click" />
...
</body>
</html>
hope it helps !!!
By using Ajax you can access code behind method from javascript . Try this code.
<script type="text/javascript">
classname.methodname();
</script>
In code behind page: in page load you need to register follwing code...
pageload()
{
AjaxPro.Utility.RegisterTypeForAjax(typeof(pagename), this.Page);
}
[AjaxPro.AjaxMethod(AjaxPro.HttpSessionStateRequirement.ReadWrite)]
public void methodname()
{
..........
........
}
Here classname is code behind page class name