Tip/ Trick: Preventing Session Loss when using Cookieless sessions with TreeView and Menu controls
By default .net runtime uses the cookies to remember the session Id between the requests ,
but when using Cookie less sessions ,the runtime inserts the Session Id to the requested url ,
this way the runtime can remember the session id and prevent the session loss .
The problem is , when using the Menu and TreeView Controls , these controls doesn't handle this issue ,
so when those controls display there data from the Site maps, they didn't append the session id to the Navigation Urls of there Items ,
and so when the User Navigate to a page using those controls , he will redirected to a Url that didn't contains the session Id,
and so the runtime can't extract the session id , Hence the session will be lost .
The Solution:
the solution is to Manually Append the Session Id to NavigateUrl of the Items for those Navigation controls,
we can use HttpContext.Current.Response.ApplyAppPathModifier to modify the Item Urls as Follows:
For the Menu Control , we can use MenuItemDataBound Event Handler to accomplish this:
protected void Menu1_MenuItemDataBound(object sender, MenuEventArgs e)
{
// appened the SessionId to Menu Item URL to Avoid sessin loss
e.Item.NavigateUrl = HttpContext.Current.Response.ApplyAppPathModifier(e.Item.NavigateUrl);
}
For the TreeView Control, we can use TreeNodeDataBound to accomplish this
protected void TreeView1_TreeNodeDataBound(object sender, TreeNodeEventArgs e)
{
e.Node.NavigateUrl = HttpContext.Current.Response.ApplyAppPathModifier(e.Node.NavigateUrl);
}
Regards,