how to solve on first time page load (redirect one page to second page) hidden field value empty.
Note:-
protected void imgbtncheckout_Click(object sender, EventArgs e)
{
try
{
double checkamount = 250.0;
double codeBehindValue = Convert.ToDouble(HDNshoppingamt.Value); // debugging HDNshoppingamt value empty.
if (codeBehindValue >= checkamount)
{
if (Session["userid"] != null)
{
...