MVC :: Application_start Event Called Multiple Times In Application
Sep 15, 2010
In my MVC application ,I am updating my web.config at runtime through application_start event.So, ideally it should be done only when the application is started.BUT in MY mvc application the application_start event of global.asax is being called multiple
times , even when i have not restarted the application.
Its being repetadly called when i am calling different actions , so the webconfig is repetedly updating & making my application very very slow. what's the reason & how to handle this .
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Similar Messages:
Oct 7, 2010
so here is the setup. I am building a page that has a listview, a datapager, and 3 datapagerfield (2 x NextPreviousPagerField, 1 x NumericPagerField), and a objectdatasource to tide all of this together.
It was all working fine until I put a breakpoint into the SelectMethod specified in the objectdatsource control. It seems like that for each datapagerfield control, it is calling the selectmethod and selectcount method. Hence, whenever a user paged, it calls the database 6 times instead of 2 (I don't have caching turned on atm). If I remove one datapagerfield, it will remove 2 calls.
Now this is build in asp.net 3.5 SP1 in VS2008. When I copied the same code files to a asp.net 4.0 VS2010 solution, it duplicate call seems to be gone.
Is this a bug in asp.net 3.5 SP1?
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Jul 6, 2010
I'm overriding the Controller.Initialize method to set some stuff before each ActionResult is executed, however I'm finding that the method is being called multiple times for each request (anywhere between 2 - 10 times). I'm running in Cassini.
My hunch is that it is running for all static files (images, css etc) as well as the requested action - although I may be wrong? I thought maybe something was wrong in my web.config but it all looks right to me.
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Mar 8, 2011
I have an application that uses an aps:GridView. The GridView is populated using a DataSource that calls a Stored Procedure. The DataSource passes parameters to the Stored Procedure based on some text fields. The page has been running slower than wanted, so I was doing some checking.
I ran SQL Profiler while loading the page, and saw the Stored Procedure was being called twice. I stepped through the code and found out that in the Page Load Complete event was where this was happening. In this event, I set the value of a parameter for the Stored Procedure, then did a DataBind on the GridView to pick up the data. As I was stepping through the code, I watched the SQL Profiler. When I got to the step of setting the parameter, the Stored Procedure had not yet been called. When I stepped through that and got to the DataBind command (before running that step), the SQL Profiler showed that the Stored Procedure had been called. Then I did the DataBind and the StoredProcedure was called again.
My question is, how do I get the parameters set, and get the GridView data bound, and only call the StoredProcedure once? If I comment out the DataBind step, the StoredProcedure never does get called (which seems really strange to me...).
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Jul 30, 2010
Web application initialization is as follows:
As we know when IIS receives the first request for a particular Asp.net application resource, IIS creates an instance of a HttpApplication (defined in global.asax codebehind).When this new instance is created it's initialization happens that also checks all configured HTTP modules.All modules are then instantiated and put in the application's Modules collection (of type HttpModuleCollection)modules are looped through and their Init() method is called (when they register for request events)
As far as I understand it the above scenario happens when a web application is started/initialized (hence application start event).What happens with modules?
Are they (re)instatiated on each request or reused from the Modules property on each consecutive request while the web application is alive? As I understand IIS and Asp.net they are reused through the whole life of a web application.
If they are reused, can we assume that their Init() method is actually a pseudo event handler for application start event? The thing is we can't attach to application level events within http modules. But if they are being reused we could use Init() as application start event and do whatever we'd put in global.asax instead.
Question,Can we assume that module's Init() method is called only on application start event? Could we use this assumption to i.e. register routes for applications whose global.asax codebehind we can't change? web.config is usually accessible and we can change it the way we want.Would this actually work?
Additional info,We can check HttpApplication code and check its InitModulesCommon() method. This one actually calls Init() of each registered HTTP module. What is more interesting is that this method is only used by InitIntegratedModules() and InitModules() methods. Which are both used only in HttpApplication.InitInternal() method. This is the basis of my assumptions, but I would like to know whether someone has abused IHttpModule.Init() for application start event.
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Jun 9, 2010
I have an application made on asp.net mvc 2 and it is on IIS 7.5 on my pc I tried profiling it and I noticed that Application_Start gets called more than once, anybody knows why is this happening ?
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Mar 31, 2011
[Code]....
When the popup opens, the following code is run:
.....
if (window.attachEvent) {
$("#rblQuickPick").change(function () {
//ClickQuickPick();
alert("something changed!");
});
.....
ClickQuickPick() is the code I will eventually run, but I put in the Alert for testing.
The issue is that when the popup extender opens, and I click an item, I get the alert once. If I click another choice I get the alert twice. If I click another choice I get the alert three times, etc.
What is triggering the event to repeat, and how do I stop it?
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Mar 16, 2010
I have a ASP.NET 3.5 web application and I would like to allow users to install this web application multiple times on the same server.
--------
WebApp1 - database1
WebApp2 - database2
WebApp3 - database3
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Jan 27, 2010
am using a master page, with children pages.
I am using forms authentication, and a session object to hold user information once the user is authenticated.
I am able to login and log out. I am able to log in and use the "remember me" functionality of the forms authentication.
When attempting to test the "remember me" functionality, the master page load event contains code to check the forms authentication & remember me, and retrieve user info from the database to automatically log the user in. This fires correctly, and the screens all load with the user successfuly logged in, and the users info is successfully stored in a session object.
Without touching anything on the screen, a moment passes and then the master page load event spontaneously fires again, Page.User.Identity.Name still contains the user name, however the session variable is now null, and throws an error.If I tell it to run past this error, it does, and the application continues to function normally, withthe session variables set correctly.
Its almost as if that second firing is ina different session, or something.
I have no problem posting code, but I have a profile class holding / handling the session communication, etc so it is a bit cumbersome.
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Jul 29, 2010
We have an MVC.NET application that encounters fatal errors when it restarts. In our Session_Start event handler, we add the session id to a dictionary. In the Session_End handler, we remove it. Consider the following sequence of requests:
GET home.mvc
<application restarts>
GET main.css
GET banner.jpg
GET somedata.mvc
...
Because of the way the application is architected, this sort of sequence happens fairly frequently if you do a rebuild while the application is open in a browser window. That wouldn't be terribly concerning except that I see it in production environments too. For example, it will occur (albeit rarely) when you edit web.config.
The requests following the restart are all due to links in the home page or AJAX calls from JavaScript.
What I observe is that .NET handles the first 5 requests in parallel. Each such request causes it to fire the Session_Start event. After a short time, it fires the Session_End event 3 times. To be clear, each Session_Start corresponds to the exact same session. They all have the same session id and the IsNewSession property is true for all session state objects. Also, the Session_End events do not correspond to the session being killed. The session persists, along with any data stored in session state.
I need to either prevent it from firing Session_Start more than once or figure out how to tell when Session_End doesn't really mean that the session has ended.
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Dec 16, 2010
I am looking at how best to prevent a single user account logging on multiple times in a webforms application. I know that MembershipUser.IsOnline exists, but I've read a few forum and blog entries suggesting that this can be unreliable, particularly in scenarios where a user closes a browser (without logging out) and attempts to logon with a different machine or browser.I looked at implementing a last past the post type system; when a user logs on older users are simply kicked off. It seems that FormsAuthentication.Signout() only works for the current user.
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Oct 20, 2010
I implemented a custom IFilterProvider derived from FilterAttributeFilterProvider and
registered it using a Unity based dependency resolver. (Pretty much as described on
Brad Wilson's blog.) While debugging, I noticed that IFilterProvider.GetFilters on my
custom class get called a lot. I counted 4 times per request.
Is this normal or am I doing something wrong?
I have a simple project that reproduces the behavior if anyone is interested.
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Feb 22, 2011
Using Forms authentication, for some reason my login page is called 9 times. it causes some browsers to show "too many redirects!". Even with no javascript and nothing in the page_load event, it is called 9 times.
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Jan 6, 2011
I have a .NET 3.5 web application that uses SQL Server for its session state store. To improve scalability I wrote a class that implements IPartitionResolver that figures out which instance of SQL Server to use for a users session. All of this works great
and just as expected.
However, when I was debugging one day I set a breakpoint at the bottom of the ResolvePartition method to make sure the correct connection string was being returned. To my surprise this breakpoint was hit many (~5-10) times per request! The same is true about breakpoints in the IPartitionResolver.Initialize method.
Does anyone know why this is? It seems to me that you would only need to call these methods once per request. It's not like the users session is going to move to a different instance of SQL Server mid request.
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Jul 15, 2010
I have class say: Public Class GlobalFA : Inherits System.Web.HttpApplication
which has been inherited from HttpApplication class and having
Public Shared MaxLoginAttempts As Integer = 0 as member variables
Now i have added below event in it i.e(Application_Start event.
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
MaxLoginAttempts = 100
end sub
Now i am access this variable on my xyz.aspx.vb page but i am geeting 0 value .
it mean application_start event is not firing .
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Dec 1, 2010
Suppose my website address is like http://localhost/MyWebsite
I wanted to access this url in Application_start event in global.asax, Can i some how get it?
[I know i can get it via application_beginrequest or other event]
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Jul 14, 2010
In our Application_Start event handler we're performing some actions that intermittently fail due to file locking issues. In this scenario we would like to return the application to an "un-started" state.By this I mean that the user will be shown an error page, and then the next time a user hits the site the Application_Start event will be fired again.
We're using ASP.NET 3.5, WebForms and MVC.
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Jun 27, 2010
In my project i need to collect customer bank details like bank Name ,Account type ,bank balance etc etc ... what would be the best way to design such that it allows us add multiple bank details to a single customer ?? and after we enter all the details all the banks details should appear in the same screen .
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Oct 28, 2010
I have a class in my App_Code folder called Order. On one of my pages I am trying to create two different orders using this class.
[Code]....
When I run the page each of the Response.Write statements ouputs a 2. But this is not correct. One should be 3 and the other should be 2. Does anyone know why this is not working?
I have a class in my App_Code folder called Order. On one of my pages I am trying to create two different orders using this class.
Private Order1 As Order
Private Order2 As Order
Sub Page_Load(ByVal Sender As Object, ByVal E As EventArgs) Handles Me.Load
Dim CartID As String = 4525543
Order1 = GetOrderFromDatabase(CartID)
Order2 = Order1
Order2.Shipping = 3
Order1.Shipping = 2
Response.Write(o.Shipping)
Response.Write(Order2.Shipping)
End Sub
When I run the page each of the Response.Write statements ouputs a 2. But this is not correct. One should be 3 and the other should be 2. Does anyone know why this is not working?
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Jan 14, 2010
i have created a custom event and assigned a handler to it .
the line which raises event is called one time but handler is getting called TWO times , why it is so ?
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Jun 19, 2010
I open a pop up window by window.open, then after selecting value from grid link i need to move my parent page as i am doing like
<a href="../../AddressBook/AB_UDCMaster.aspx?mode=Search&ParentCode=<%# Container.DataItem("ParentUDCCode") %>&UDCParentID=<%#Container.DataItem("UDCParentID")%>'"><%#Container.DataItem("ParentUDCCode")%></a>
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Oct 5, 2010
i have to two buttons in aspx page. i added ajax functionality to the page. but now thesee two button appears twice when i run the page.
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Aug 11, 2010
I am using a document.getElementById("val").click() to invoke a click event, but it keeps firing multiple times.
Here I add the eventHandler
try {
//add mousedown event handler to navigation buttons
addEventHandler(oPrevArrow, "mousedown", handlePrevDayClick);
addEventHandler(oNextArrow, "mousedown", handleNextDayClick);
addEventHandler(oLogout, "mousedown", handleLogoutClick);
}
catch (err) {
}
In the click event i am performing a "auto click"
function handleNextDayClick(e) {
e = e || window.event;
stopEvent(e);
document.getElementById("btn_nextday").click();
}
NB: the button that is auto-clicked calls a method in the ASP.NET Code-Behind
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Feb 17, 2011
I have the JQuery tab control on my page and each tab will be using the same partial view with a filter set of the model. What is the best way to do this?
The only thing is the data needs to be filtered before it gets to each partial view.
I am currently putting the filtered model data in ViewData but I do not know how to reference that in the partial views.
[Code]....
In my partial view:
[Code]....
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Aug 31, 2010
I have an ASP.NET page that contains a gridview.
I have to create columns dynamically based on a datatable, some field type info and some header texts.
I do that by creating templates.
It created the grid fine and all looks good, however when i click a checkbox and the checkedchanged event fires then something odd happens
The first time i click its fine and i get the expected values in the event
But the second time then the event gets fired with the values from the first time and then again with the values from the checkbox that i actually clicked.. The third time the event gets fired 3 times, first 2 times with the old values and the third with the correct value.
Here is the code:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;........
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