Clearing Session In Global Application_Error?
May 10, 2010
Whenever an unhandled exception occurs on our site, I want to:
Send a notification email Clear the user's session Send the user to a error page ("Sorry, a problem occurred...")
The first and last I've had working for a long time but the second is causing me some issues. My Global.asax.vb includes:
[Code]....
When I run a debug, I can see the session being cleared, but then on the next page the session is back again!
I eventually found a reference that suggests that changes to session will not be saved unless Server.ClearError is called. Unfortunately, if I add this (just below the line that sets "ex") then the CustomErrors redirect doesn't seem to kick in and I'm left with a blank page?
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Similar Messages:
Oct 8, 2010
I'm trying to handle all my application exceptions inside the global.asax but from some reason it's not firing at all, i never tried to do it before so i guess i'm doing something wrong here...
here is the code inside the default.aspx page that throw the error:
[Code]....
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Nov 14, 2010
Just for kicks, how do you say, wire up an ASP button to purposely throw an Application_Error exception in the global.asax file?
lets say you wanted to test the functionality of the error handling and what is doing..and you don't have a real error to do it. what is the easiest way just raise this event?
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Jan 27, 2011
Looking for best practice focused answers here with explanations.
Should the presentation layer of an ASP.Net app catch and handle exceptions thrown from the business layer, or should these be allowed to bubble out, where they can all be logged and handled uniformly in the Global.ascx's Application_Error handler?
[code]....
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May 25, 2010
I am handling errors in Global.asax. When I encounter an error in certain pages, the Application_Error event fires twice. On the second trip, Server.GetLastError() returns null. I have a simple page where I throw an error in page load. When that page throws an error the code below works fine. I also have a more complex page with an update panel and many controls. When that page throws an error Application_Error fires twice. I suspect the update panel but update panels are always suspect, right?
There are no try/catch blocks on any of my pages I'm testing with. Custom errors in web.config is commented out. Note that logging and busywork in the Application_Error event are commented out. I'm pretty much just doing a respone.redirect. The problem with the the event firing twice is that the response.redirect fails with an error msg stating that headers have already been sent (adding Context.ClearError and Response.Clear does nothing to fix that).
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Oct 11, 2010
I am trying to use the Application_Error to redirect the user to a custom error page. I know I could use the web.config to do this, but let's assume for now that this is not a desirable path to take.
Initially, I tried to do a Response.Redirect to perform this, however, there seem to be occasions where the current http context does not define the response object. So, I attempted to perform a check to make sure that the response object is not null prior to attempting the redirection, and if it is not defined, perform a Server.Transfer instead.
What happens is that in most cases, the Redirect causes the browser to some generic "friendlyish" error page rather than the requested error page.
So then I tried using Server.Transfer exclusively, and this worked well for most cases, however, sometimes the transfer didn't seem to take in the browser. Changing it back to a redirect in these cases solved that problem, but reintroduced the issue where the errors previously being captured and transferred now were being redirected.
What I surmised from this is that in certain contexts where the Application_Error method is trapped, it is necessary to use Server.Transfer in redirection, whereas in others, it is necessary to use Response.Redirect. The question then became twofold: (a) When is one necessary and when is the other? and (b) What available information can I poll to tell me when a given condition exists.
After much searching, I cannot find a reasonable answer to this question. So I began to trap errors and examine the HttpContext object for some indicator. One thing that I was looking for is the reason why if even with a defined Response in the current context does a redirect fail. The only thing that stood out is that even though a Response object may exist, the Session data could be absent. I added the case to check whether the Session data was null and perform a Transfer in this case and it
seems to be handling it properly.
I emphasize "seems to be handling it properly" because no documentation I've been able to find confirms either the problem I am having or whether this is an appropriate strategy for solving it.
I guess the question is, am I on the right track here or is the null Session object just a red herring, indicative of nothing relevant. Here's the check I have set up for reference.
[Code]....
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Sep 14, 2010
I added the following code to global.asax to load up several session variable when a session starts. I'm assuming that when a page goes to use the variable that I should be
1) checking at the page level that the value is valid not 0 when its not expected to be 0, not a zero-length string when its expected to have a length
2) have code at the page level that sets the values if the values have not been set as when the Session timeout, ideally putting the code in a class derived from Page and then deriving all of my pages from the new class so that the code does not have to be repeated in every page
[Code]....
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Feb 13, 2013
I cleared session using session clear method nut does not clear in button click...
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Nov 10, 2010
Session variables are on server side. I need to clear out the server side session variables on browser close on client side. I have used a WebService and ajax call but still i am not getting the session cleared.
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Sep 22, 2010
I am using Post method to generate crystal reports. The user requirement is to show the report in a modeless pop up screen.
The session data needs to be cleared as it may at times contain a very large dataset.
One implementation I have placed in at present is - placing a button "Close Button". When user clicks close button, I am able to clean up the session content as well as close the window.
The issue I am facing is to get the handle of the modeless window when it is closed using the x button. Also, since the pop up window is modeless, the user might have moved to another screen, henceforth the parent of the popup window is already changed or out of context.
How do we clear the sesssion content when the issue condition arises?
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Mar 1, 2010
I have an webforms app that loses it's session variables on response.redirect. I've read Bertrand Le Roy's blog about this and still can't get it to work. The page works in production. However, when I try in the VS2k8 IDE, the session variables are there right before response.redirect and on the first line of the next page, the variables are nothing. I've confirmed the session id is the same so I'm not skipping sessions. The target page is relative so the web server doesn't think we're changing sites (as confirmed by the sessionid).
Response.Redirect("menu.aspx", False)
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Aug 19, 2010
i want to create a global session which will stay active until and unless we manually kill it.how to do this in asp.net with c# what i am doing is
HttpContext.Current.Session["UserID"] = someValue;
but in this way the session is lost after some time.
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Feb 24, 2011
Quick question: Is there a "per-user" data storage object (similar to Session) that I can store data in the global scope (similar to HttpRuntime.Cache)? Almost as if Session and HttpRuntime.Cache had a baby.
Full Background: I have a ASP.NET website that was originally written for a single thread. Now I changed it so that certain actions will spawn a background thread and the browser polls a service to get status updates.
The problem I am having with this is that certain pieces of data are stored into the HttpContext.Session[] object (membership authentication token, for example). These pieces of data need to be unique to each user and accessible to the background thread. Session is not available to the background thread.
I am aware of HttpRuntime.Cache but that would require micromanagement to segment out the users and to expire it at the same time the session is expired. Session, on the other hand, automatically expires this things at the right times that I want it too and is already used by things like the SqlMembershipProvider.
My question is, is there something that behaves similar to the Session but exists in the global scope?
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Mar 20, 2010
how to get sessions in the global.asax, but I still cant get it to work...for some reason my session throws NullExceptions..the sessions are set from another page add looks something like:
[Code]....
And once I try to get those session values I do the following in the Global.asax:
[Code]....
But as I said, for some reason I get a NullException once I try to get the values...and they do have the same session-name,so they shouldn't be null..
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May 21, 2010
I want to use something better thatn using the session to store global values, because it has somw problems
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Dec 20, 2010
i dont know about Global.asax so give some information about it and also tell me about the implementation and use of session_start and session_end event. How to call Global.asax in our website.
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Nov 15, 2010
I'm using VS2010 and created a simple asp. web forms application, using Development Server to test it. I try to store user data - queried from sql server - in the session, since I don't want to access database in every request. I'm using the 'Application_AuthenticateRequest' and the 'Session_Start' methods.
First round:
AuthenticateRequest called. The following code ran:
[Code]....
The _current variable is a private static field published through a static property. In the first round the Session is null, and I think it's ok because the Session_Start not called yet. The Session_Start looks like this:
protected void Session_Start(object sender, EventArgs e)
{
Session["EMPLOYEE_DATA"] = EmployeeFactory.Current;
}
In the next round the Session_Start is not called of course but in the AuthenticateRequest I can't access to the session. The HttpContext.Current.Session is null and the this.Session reference throw a HttpException says the "Session state is not available in this context".
However I can access the Session from any of the page_load events but it's a bad practice I think that I put authentication every page_load.
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Jan 12, 2011
i am new in asp.net form authentication and sessions
i would like to know how to save session in masterpage or in global.asax and how to clear session.
how to better handle session timeout by redirecting to a page.
this is my web.config session settings
<sessionState mode="InProc" cookieless="false" timeout="1"></sessionState>
code in my masterpage
[code].....
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Apr 6, 2010
When i start the application, based on some condition in global.asax page,i wil redirect to login page.If i click the logout button,
there i vil be clear all session value. here i want to initiate new session value like Session["InitialLogin"]="Yes".
How can i get this value in global .asax page. If get that session value [i.e Session["InitialLogin"]="Yes"], i vil redirect to some other page.
I cant able to get session value in global.asax page.i always getting null value.
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Aug 18, 2010
I have a method in one class file with defination like this which gets the user id of logged person.
public string GetUserID(HttpRequest req)
{ .... }
I need to call this method in global.asax and save that value in session. I need to use this session value i need to use this Session value and assign that to label in Masterpage. I did not use global.asax before. And what should be the input to method... i have seen only Request is have the returntype HttpRequest. So i thought of giving that.
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Mar 26, 2010
I'm getting a very peculiar problem with my asp.net application, it took me an age to track down but I still don't know what is causing this behaviour.
If I set a session variable in the Application_PreRequestHandlerExecute event, then my external JavaScript files are ignored, and therfore causing a raft of errors. I have simplified the problem below.
E.g.
I have file called JScript.js containing the code:
function myAlert() {
alert("Hi World");
}
And in my Default.aspx file I reference the js with the code:
<script src="JScript.js" type="text/javascript"></script>
And in the body onload event I call the myAlert() function:
<body onload="myAlert()">
And finally in the Global.asax file:
Private Sub Application_PreRequestHandlerExecute(ByVal sender As Object, ByVal e As EventArgs)
HttpContext.Current.Session("myVar") = "MyValue"
End Sub
If you run the Default.aspx file you will see the js function isnt called, however, if you comment out the line of code Global.asax then the external js is called and the function executed when the page loads.
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Mar 10, 2011
I am have declared a session variable in login page of my application. I want to access that session variable in Application_BeginRequest of global.asax file. But I am not able to do it. Could you please suggest how to access the session variable in my global.asax file
void Application_BeginRequest(Object sender, EventArgs args)
{
string language = HttpContext.Current.Application["language"].ToString();
}
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Apr 8, 2010
I'm trying to use SESSION in my MVC application.I wrote following line in Global.asax in Application_Start() method file:
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
//uzupełnij zmienne sesyjne
HttpContext.Current.Session["LOCATION_ID"] = 15;
RegisterRoutes(RouteTable.Routes);
}
I also enabled SessionState in Web.config by addind following line:
<sessionState mode="InProc" cookieless="false" timeout="120" />
And when I run the application I'm getting this exception:
Szczegły wyjątku: System.NullReferenceException: Odwołanie do obiektu nie zostało ustawione na wystąpienie obiektu.
Błąd źrdła:
[Code]....
Wiersz 31: //uzupełnij zmienne sesyjneWiersz 32: Wiersz 33: HttpContext.Current.Session["LOCATION_ID"] = 15;Wiersz 34: Wiersz 35: RegisterRoutes(RouteTable.Routes);
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Feb 1, 2010
My ASP.NET intranet web application uses Windows Authentication, and I would like to record the following details:
1) Windows ID
2) Session Start Time
3) Session Stop Time
4) URL being browsed to (optional)
I've got some basic code setup in "Session_Start" method of the Global.ASAX to log session start times (seen below), but that's it so far. I have the feeling this is a primitive approach and there are "better" ways of doing this. So I really have two questions:
1) Is this the right way to go about doing this? If not what are some other options?
2) If this is the right way, do I just need to drop some code in the "Session_End" method to record the time they exit, and thats a complete solution? Does this method always get called when they close the browser tab they have the site open in, or do they have to close the entire browser (I don't have logout functionality)? Any way users can skip over this session end method (or start for that case)?
Dim connsql As New System.Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("MyConnectionstring").ConnectionString)
Dim cmdsql As System.Data.SqlClient.SqlCommand = connsql.CreateCommand
cmdsql.CommandText = "BeginUserSession"
cmdsql.CommandType = Data.CommandType.StoredProcedure
Try
cmdsql.Parameters.Add("@windowsid", System.Data.SqlDbType.VarChar, 30, "windowsid")
cmdsql.Parameters("@windowsid").Value = Session("UserInfo").identity.name
If connsql.State <> System.Data.ConnectionState.Open Then connsql.Open()
cmdsql.ExecuteNonQuery()
connsql.Close()
Catch ex As Exception
Finally
If connsql.State <> Data.ConnectionState.Closed Then connsql.Close()
End Try
'Stored Proc records start time
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Sep 3, 2010
I have a custom class that pulls user information from a SQL Server table. Now that I'm expanding the site from a single page to others. I want to shift the code to the Session_Start event so that the information is always loaded when the site is accessed. How do I call my custom code from global.asax since its script and not a class.
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