CODEWITHSUNDEEP
c#javascriptjqueryasp.net
Kourosh
Kourosh

Reputation: 789

Reading value of hiddenfield after javascript on server side

I have a problem with asp:hiddenfield, when I change its value in client side and wants to get it in server side , it gives me null... here is client side code :

function pageLoad() {
        var gV = $('#<%=HiddenField1.ClientID %>');
        gV.val("1");
}

and I want to get the value of hiddenfield in server side code :

protected void Button1_Click(object sender, EventArgs e)
    {
        Button1.Text = HiddenField1.Value;
    }

but the result for text of button is null... why?? thanks in advance:)

Upvotes: 0

Views: 1005

Answers (2)

Win
Win

Reputation: 62260

Could you try with document ready? 

<asp:HiddenField runat="server" ID="HiddenField1" />
<script type="text/javascript" 
   src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
    $(document).ready(function () {
        var gV = $('#<%= HiddenField1.ClientID %>');
        gV.val("1");
    });
</script>
<asp:Button runat="server" ID="Button1" OnClick="Button1_Click" />

Or - Use ScriptManager to call pageLoad

<asp:ScriptManager runat="server" ID="ScriptManager1"></asp:ScriptManager>
<asp:HiddenField runat="server" ID="HiddenField1" />
<script type="text/javascript" 
  src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
    function pageLoad() {
        var gV = $('#<%= HiddenField1.ClientID %>');
        gV.val("1");
    }
</script>
<asp:Button runat="server" ID="Button1" OnClick="Button1_Click" />

Upvotes: 0

Jason P
Jason P

Reputation: 27012

After this line:

var gV = $('#<%=HiddenField1.ClientID %>').val();

gV is a string, so gV.val("1") doesn't make sense.

Try this:

var gV = $('#<%=HiddenField1.ClientID %>');
gV.val("1");

Now, that shouldn't cause HiddenField1.Value to be null... did you mean empty?

Upvotes: 1

Related Questions