Category
Depends on which mode you are using:
For more info: BUG: Session Data Is Not Saved in Out-of-Process Session State
Include a sql trusted connection, or put the connection string as encrypted data in the registry.
Refer
This problem may occur after you install Windows Sharepoint Server(WSS) on a server that has Microsoft Visual Studio .NET 2003 installed. The WSS ISAPI filter handles all incoming URLs. When you browse one of the ASP.NET Web application virtual directories, the ISAPI filter does not locate the URL path of the folder.
To resolve this refer Session state cannot be used in ASP.NET with Windows SharePoint Services
This can be due to application recycle.
See PRB: Session variables are lost intermittently in ASP.NET applications
In v1, there is also a bug that will cause worker process to restart. It’s fixed
in SP2 and v1.1. See FIX: ASP.NET Worker Process (Aspnet_wp.exe) Is Recycled Unexpectedly.
No. This MSDN article shows how to work around it:
How to Share Session State Between Classic ASP and ASP.NET
Here is an article from ftp online: Simplify State Maintenance With ASP.NET
PermalinkHere is an article from ftp online: Manage Session State on the Client that describes how Cookies, Hidden Fields and Query Strings can be used to preserve session state.
PermalinkHere is an article from ftp online: Manage Session State on the Server.
PermalinkHere is an article from ftp online: Display and Manage Images in ASP.NET
PermalinkClient state can be managed in different ways, session state, view state or using cookies.
Here is an article from ftp online: Manage Client State that discusses this in more detail.
Your HttpHandler has to implement the ‘marker’ interface IRequiresSessionState or IReadOnlySessionState in order to use session state.
PermalinkSetting Cookieless=true implies some restrictions, mainly:
You will have the HttpSessionState object available. Just use ’Session’ to access it.
For HttpContext, it is not available because this event is not associated with any request.
PermalinkThe reason is that your frameset page is an HTM file instead of an ASPX file.
In normal a scenario, if the frameset is an aspx file, when you request the page, it will first send the request to the web server, receive an asp.net session cookie (which holds the session id), and then the browser will send individual requests for the frames, and each request will carry the same session id.
However, since your frameset page is an htm file, the first request comes back without any session cookie because the page was serviced by ASP and not ASP.NET. Then again your browser sends out individual requests for each frame. But this time each individual request will NOT carry any session id, and so each individual frame will create its own new session. That’s why you will see different session ids in each frame. The last request that comes back will win by overwriting the cookie written by the previous two requests. If you do a refresh, you will see them having the same session id.
This behavior is by-design, and the simple solution is to change your frameset page to .aspx.
PermalinkThe SessionID lasts as long as the browser session lasts even though the session state expires after the indicated timeout period i.e the same session ID can represent multiple sessions over time where the instance of the browser remain the same.
PermalinkThe session Timeout is a sliding expiration time, meaning whatever your page access session state, the expiration time will be moved forward. Note that as long as a page has NOT disabled session state, it will access the session automatically when requested.
PermalinkVB.NET
Dim strKey as string
For Each strKey In Session.Keys
Response.Write(strKey + ' : ' + Session(strKey).ToString() + '<br>')
Next
C#
foreach (string strKey in Session.Keys)
{
Response.Write(strKey + ' : ' + Session[strKey].ToString() + '<br>');
}
PermalinkSession state implements a reader/writer locking mechanism:
VB.NET
Dim x As New SortedList()
x.Add('Key1', 'ValueA')
x.Add('Key2', 'ValueB')
To store in Session:
Session('SortedList1') = x
and to retrieve
Dim y As SortedList = CType(Session('SortedList1'), SortedList)
C#
SortedList x = new SortedList();
x.Add('Key1', 'ValueA');
x.Add('Key2', 'ValueB');
To store in Session:
Session['SortedList1'] = x;
and to retrieve
SortedList y = (SortedList) Session['SortedList1'];
PermalinkThe Timeout setting is in minutes, not in seconds. i.e The timeout attribute specifies the number of minutes a session can be idle before it is abandoned. The default is 20
PermalinkUse HttpSessionState.Remove()
PermalinkUse HttpContext.Current.Session i.e
VB.NET
HttpContext.Current.Session('CustID') = '1'
C#
HttpContext.Current.Session['CustID'] = '1';
Permalink
Use HttpContext.Current.Session
VB.NET
HttpContext.Current.Session('Value1') = '1'
C#
HttpContext.Current.Session['Value1'] = '1';
In similar manner you can use Application Variables too.
PermalinkEven those enableSessionState is marked as ReadOnly, but in InProc state, the user can still modify the session. The only difference is that the session will not be locked during the request. This limitation is by-design
PermalinkIn SQLServer mode, session expiration is carried out by the SQL Agent using a registered job. Make sure your SQL Agent is running.
PermalinkWhen using cookieless, you must use relative path (e.g. ..\webform1.aspx) instead of absolute path (e.g. \dir1\subdir1\webform1.aspx). If you use absolute path, ASP.NET cannot preserve your session ID in the URL.
PermalinkIt depends on which event you’re handling. Session is available only after AcquireRequestState event
PermalinkSession_End is fired internally by the server, based on an internal timer. And thus there is no HttpRequest associted when that happens. That is why Response.Redirect or Server.Transfer does not make sense and will not work.
PermalinkThe major difference is that if you call Session.Abandon(), Session_End will be fired (for InProc mode), and in the next request, Session_Start will be fired.
Session.Clear( ) just clears the session data without killing it.