hidden field value empty

Dear Amit

 

 

value change not a fixed.

 first time page load not get hidden field value . how to update hidden field value.

i want to redirect one page to second page hidden field value lets(62)or(2000) any value so i get right value.

 

code(aspx)

 

 

code(aspx.cs)

protected void imgbtncheckout_Click(object sender, EventArgs e)
{
try
{
double codeBehindValue = 0.0;

double checkamount = 250.0;
if (!string.IsNullOrEmpty(HDNshoppingamt.Value))
{

codeBehindValue = Convert.ToDouble(HDNshoppingamt.Value);
}
if (codeBehindValue >= checkamount)
{

if (Session["userid"] != null)
{

...

...

..

Hey,

 

1.https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.hiddenfield.value%28v=vs.110%29.aspx

 

2.

$(document).ready(function() {  
   $("<%= HiddenField1.ClientID %>").val("123");
 });