I try to setup a E-shop. Next to every item I've an asp:imagebutton when this imagebutton is clicked I'm checking whehter the session varialbe session["basket"] exists or not if not then I add the values in a list (entity class) and I add this list in the session.
if the session is not empty then I retrieve the values from session into List and change the list and then add the list back to session.
Issue:
For some reason I loose the session variable, suddenly. I checked on my watch (time) and it's unpredicatble sometimes it takes less than 1 minute, sometimes 3 minutes and sometimes 5 minutes etc....
why do I loose the session variable?
I googled and I've found - it can happen if you use Response.Redirect - w/o false parameter, or if you're in an UpdatePanel etc.
I'm loosing the variable in the same page for the moment.
The whole idea is put in a session variable and do checkout and retrieve the session variable in second aspx page... but this is not always working, because most of the case the session variables becomes empty. And sometimes it works.
can someone advice ? what and where do I need to check? In some website pages (google) they advice to use caching, but caching is application based, so everybody will retrieve the same value.
In my page any user (authenticated or anynomous user) in other words any user without login should able to order (I'll send invoice to pay upfront)....
I''m not using webfarm, nor web garden... I just checked the IIS - website - session state - It's in process, cookie settings = use cookies, name = asp.net_sessionid, time-out = 20....
please advice?
It's C#, ASPX 3.5, IIS7.5
I DON't have PAGE_LOAD in my ASPX page.
// the only place I put the sessoin=null is a linkbutton, for the rest I don't put null in session["basket"]....
protected void lnkDeleteAllSelected_Click(object sender, EventArgs e)
{
Session["Basket"] = null;
ReloadBasketItems();
}
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
//System.Diagnostics.Debugger.Break();
lvJuridisch.ItemDataBound += new EventHandler<ListViewItemEventArgs>(this.lv_ItemDataBound);
lvJuridisch.DataBound += new EventHandler(lv_DataBound);
}
imgButtonAddtoBasket -> is defined as asp:imagebutton in the asp:listview
protected void imgButtonAddtoBasket_Click(object sender, ImageClickEventArgs e)
{
ListViewDataItem lvi = ((sender as ImageButton).NamingContainer) as ListViewDataItem;
DataKey currentDataKey = (lvi.NamingContainer as ListView).DataKeys[lvi.DataItemIndex];
WebShopInfo SingleItem = new WebShopInfo();
SingleItem.cd_type_pub = currentDataKey[0].ToString();
SingleItem.no_pub = currentDataKey[1].ToString();
SingleItem.no_suite_pub = Convert.ToInt32(currentDataKey[2]);
SingleItem.cd_langue = Convert.ToChar(currentDataKey[3]);
SingleItem.lb_titre_red = (lvi.FindControl("HiddenfieldProductRed") as HiddenField).Value;
SingleItem.m_price = Convert.ToDecimal((lvi.FindControl("hiddenField_M_Price") as HiddenField).Value);
SingleItem.nm_price = Convert.ToDecimal((lvi.FindControl("hiddenField_NM_Price") as HiddenField).Value);
SingleItem.mt_pourc_tva = Convert.ToDecimal((lvi.FindControl("hfBTW") as HiddenField).Value);
List<WebShopInfo> lws = new List<WebShopInfo>();
if (Session["Basket"] == null)
{
//Session is empty so add listview to the session....
//Session.Timeout = 20; -- I tried this but this is not working too...
lws.Add(SingleItem);
Session["Basket"] = lws;
}
else
{
//Session is not empty so get asp:listview from the session.
lws = Session["Basket"] as List<WebShopInfo>;
WebShopInfo wsi = lws.Where(a => a.cd_type_pub == SingleItem.cd_type_pub &&
a.no_pub == SingleItem.no_pub &&
a.no_suite_pub == SingleItem.no_suite_pub &&
a.cd_langue == SingleItem.cd_langue).SingleOrDefault<WebShopInfo>();
if (wsi != null)
lws.Remove(wsi);
if (SingleItem.Count > 0)
lws.Add(SingleItem);
Session["Basket"] = lws;
}
ReloadBasketItems();
}
Session["basket"] = nullin the page_load section ? - V4Vendetta