access javascript variable in page load event c#

Question

I am setting session variable in Page1.aspx inside document.ready As

sessionStorage.setItem('PrePayAmt', 'Some Value To Be Stored');

Now i want to get this value in Page2.aspx Page Load Event

protected void Page_Load(object sender, EventArgs e)
{
     // Get Value Here
}

I have declared script section in Page2.aspx Where i am able to get this value

<script type="text/javascript">
    $(document).ready(function () {
        var pre_pay = sessionStorage.getItem('PrePayAmt');
        alert(pre_pay);
    });
</script>

I have also got one hidden variable in Page2.aspx As

<asp:HiddenField runat="server" ID="hdnPrePayAmt" />

How about getting the value from hiddenField in code behind?? — User2012384, Aug 18 '14 at 07:38
You have to make, either post to page2, either send it on url, when you call page2. — Aristos, Aug 18 '14 at 07:40
@Aristos : Apart from that any alternative i hate to pass it as query parameter because it is amount which i am passing. — Shaggy, Aug 18 '14 at 07:43
@User2012384 : do i able to access then in my `page_load` event ? — Shaggy, Aug 18 '14 at 07:44
I suggest you to update the hiddenfield's value using javascript, then you'll be able to get it back in code behind. — User2012384, Aug 18 '14 at 07:46
@User2012384 : I tried that but it getting set after `page_load` event. read question once again — Shaggy, Aug 18 '14 at 07:52
Oh...Sorry...just now misunderstand your question, just now did some research, according to this article: http://stackoverflow.com/questions/10488790/access-web-storage-from-server-side-possible, it said it isn't possible to access sessionstorage from code behind, but it recommend several ways to get it, see if it helps.. — User2012384, Aug 18 '14 at 08:04

score 0 · Accepted Answer · answered Aug 18 '14 at 08:43

You were correct to try and set a hidden value that gets posted back, however if you use a sever-side asp.net HiddenField (i.e. asp:HiddenField) you need to specify a ClientId="hdnPrePayAmt" setting and not just ID=

e.g.

<asp:HiddenField runat="server" ClientID="hdnPrePayAmt" />

as

<asp:HiddenField runat="server" ID="hdnPrePayAmt" />

will generate its own client-side ID for that field.

If you view your page source in the browser you will see what is going on

access javascript variable in page load event c#

1 Answers1