C# - Application_Error No Longer Triggers When Published To IIS?
Oct 22, 2010
I have the following code in my Global.asax file:
[code]....
To provide neat and tidy error urls like "/Error/404/TheNameOfTheRequestedPage". This works fine from VS 2008, but once published to my local machine, I get the default error page:
Error Summary
HTTP Error 404.0 - Not Found The resource you are looking for has been removed, had its name changed, or
is temporarily unavailable
I've chosen not to use system.web/customErrors because I don't have access to Server.GetLastError() from there (or at least it's never worked for me) and I want to get the http code.
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Feb 22, 2011
I have a .js file that works fine locally, but I am somehow having path problems when I commit and add to my server. I have "Home" for the controller name, and "LoadTable" for the JsonResult function.
$(document).ready(function () {
$('#tableClick').click(function () {
$.post("Home/LoadTable", $('#FormTable').serialize(), function (data) {
alert("test");
}, 'json');
});
});
Should I have the path name be something else when published? If so how do I toggle from local to server version in my webconfig, if possible? Is there another option?
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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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Feb 21, 2011
I have writen error handling code in my Application_Error event in global.aspx page, but that event is not executed any time when error is occurring.So do I need to take care any other settings on my application to run this.
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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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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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Nov 30, 2010
i am new in asp.net mvc. Sometimes i have an exception in Application_Error and i write it to my log file:
[Code]....
I trying debug but i not see file name? How to see witch file cannot be found ?
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Jun 9, 2010
If I have a customErrors section in my Web.config that says to redirect to Error.html, then putting code in the Application_Error method in the Global.asax to redirect to Error.html is redundant is it not? Technically, I could bypass the Web.config by redirecting to a different page in the Application_Error method if I wanted to, but since I don't want to go to a separate page I don't think I need the code.
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Jun 4, 2010
the application keeps running even after Application_Error event is called, is there any way to terminate the application in that event itself
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Nov 28, 2010
When I start debugging my application using vs2010 before the default.aspx page is rendered the application_error event is fired in global.asax.
There is nothing happening in the page_load of the default.aspx screen.However, if I set a break point on the default.aspx page_load event and the application_error event here are the sequence of events: The page_load event of default.aspx is fired, there is no code to execute there so I hit F5 to continue. The application_error event is then fired.Here are some of the details from Server.GetLastError();
exception message is "File does not exist."
stack trace:
at System.Web.StaticFileHandler.GetFileInfo(String virtualPathWithPathInfo, String physicalPath, HttpResponse response)
at System.Web.StaticFileHandler.ProcessRequestInternal(HttpContext context, String overrideVirtualPath)
[code]...
I have absolutely no idea why this event is fired. Do all of the events in the Global.asax get fired on startup?There is nothing happening on the page_load so how can an error be thrown?
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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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Nov 23, 2010
http://blogs.msdn.com/b/tmarq/archive/2009/06/25/correct-use-of-system-web-httpresponse-redirect.aspx
http://weblogs.asp.net/bleroy/archive/2004/08/03/Don_2700_t-redirect-after-setting-a-Session-variable-_2800_or-do-it-right_2900_.aspx
I've followed the instructions in the two articles above, plus more and I still cannot get response.redirect to work. I am able to see the url of the page I am trying to redirect to in fiddler but the browser does not navigate to the page. I am using Cassini as a web server, could that be the problem?
Here is global.asax
[Code]....
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Apr 13, 2010
I was testing out my custom error handling specifically around 404s when I came across an intersting problem, which I recreated on a new web application.
Create web application
Create a global.asax file
Create a new web form - error.aspx - "This is the error page text"
[code]...
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Jan 22, 2010
I have the following settings. Asp.net 2.0 / Vs.net 2005 / Web.config -> customErrors mode="on"
<customErrors mode="On" defaultRedirect="~/ErrorPages/Default.aspx">
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Nov 11, 2010
I know there are a few posts on this issue already, however I haven't found the answers I was really looking for.
My situation is like this: I have a DLL project containing my business logic. Then I have a web application that refers to this DLL, and calls a function from it. And I have a global.asax which handles errors on Application_Error
Sample:
// MyWebsite.aspx.cs
using MyBusinessLogic;
protected void Page_Load(object sender, EventArgs e)
{
MyBusinessLogicClass.DoSomething();
}
// global.asax.cs
protected void Application_Error(object sender, EventArgs e)
[Code].....
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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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Oct 9, 2010
I have error handling in Application_Error event of globals.asax file. Inside this event, I'm using Response.Redirect(~errorview.aspx) method, for redirection to site which is able to handle errors in user friendly way.
Everything works fine, unless exception is rising in Application_Start event. When error occurs there, my application gets trapped in infinite loop with the Application_Error method hit repeatedly. What is more, the page I'm redirecting to never gets hit. Changing Response.Redirect(~errorview.aspx) method to Response.Redirect(~errorview.aspx, false) changes nothing.
The good news is, when Response.Redirect(~errorview.aspx) has been replaced with Server.Transfer(~errorview.aspx), errorview.aspx page succesfully gets hit.
The side effect now is not loading CSS, and errorview.aspx page looks ugly. What is more, the CSS is not loaded only when exception occurs in Application_Start event. Exceptions thrown from any other place don't make the CSS mess.
How I can handle this problem in correct way, and why the CSS is missing in the one particular situation ? What is the appropriate way of handling errors in my case ?
UPDATE
For CSS loading, I'm using this:
<link href="~/Css/Layout/style.css" type="text/css" rel="stylesheet"
runat="server" ID="_uid" />
error page I'm transfering from: http://localhost/APP/Pages/Module/Pages/ErrorView.aspx
css folder path: http://localhost/APP/Pages/Module/CSS/Layout/style.css
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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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Sep 7, 2010
I have a Database with some tables in an Asp.Net project (C#),I wanna to run a method in C# whenever some data was written in the tables.
I know I have to use triggers, but I don't know how!
P.S:I'm using SQLExpress 2008,
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Mar 18, 2010
Triggers run twice
[Code]....
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Oct 7, 2010
regarding one issue I am facing. I created a httpmodule for hadling the unhandled errors and I need to log those errors using log 4 net in database.Everting working fine but I am not getting any error information once the error was hadled and I need that info too. I want to make it as a centralize module which can trap all errors and log those errors.How call application_error event of httpmodule from catch block...so that I can log that info there and I no need log in every catch block..
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Apr 26, 2010
I am trying to write a quote generator. For each product, there are a set of options. I want to dynamically add a drop down list for each option, and then have their SelectedIndexChanged events all wired up to update the quote cost.
I am not having any trouble adding the DropDownList controls to my UpdatePanel, but I can't seem to wire up the events.
After the page loads, the drop downs are there, with their data, but changing them does not call the SelectedIndexChanged event handler, nor does the QuoteUpdatePanel update. I have something like this:
Edit: Since programmatically adding AsyncPostBackTrigger controls is not supported, I've change my code to this, but I still don't get the event:
Edit 2: Tried adding a PlaceHolder to add the drop down lists to (instead directly into the ContentTemplateContainer, still no events firing.
[Code]....
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Feb 15, 2010
I want to dynamically populate a form field from multiple other fields in the form.
If input A or input B is changed, input C should be updated based on the values in input A and input B.
The DynamicPopulateExtender in Ajax control toolkit has almost this. With it I can populate a target based on a trigger.
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Oct 21, 2010
CREATE TRIGGER alert
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May 25, 2010
i was made 'webusercontrol'
and i use this:
event 'msgok' :when btnOk clicked
event ''msgcancel' : when btnCnl clicked
sub 'show' : show this dailog
problem : when i add my 'webusercontrol' to a page,
i can add events(msgok,msgcancel) to page codebehind,
but i cant add this to updatepanel tiggers.
make update panel able to add my 'webusercontrol' events ??
webusercontrol code:
[Code]....
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