I've been tasked with creating a class that will handle errors in my Web application. I'm told the goal is to have a separate .cs file that can be called to handle any errors that come along. I have no idea where to begin, and I've googled but I don't think I'm googling the right thing because I'm not really finding anything.
View 9 RepliesI get this error while trying to create a class lib project Name 'HttpContext' is not declared.i included Imports System.Web.
View 1 RepliesI am part of a team that is developing a SharePoint web part. My task is to create a user control which will ultimately be wrapped in another class for presentation in a web part. Because of these requirements, I must fit all of my code in a single user control.To organize my code in the code-behind, I created a few private classes for the different objects which are represented in the database. I want to add some exception handling whereby if some sort of DB exception is thrown I can update a message on the page informing the user of the problem.
My problem is that the page-level controls are inaccessible from the private class where I'm issuing the query, so even if I catch the exception I have no way of directly accessing a Label control to populate the error. I tried to create a baseclass with an EventHandler defined, but when I throw events from the private class I'm not able to catch them for whatever reason. I'm far from an OOP expert Here is a snippet:
ASP Code:
using System;
using System.Collections;
[code]....
When a server error occurs for whatever reasons (YSOD), the server will send a message via SMTP class. In my case, my company employs microsoft exchange and uses NTLM authentication for all domain users. I am authenticating users via NTLA windows integrated authentication. My question is, is it possible to utilize this authentication data, and pass it to the system.web SMTP username/password authentication scheme to send an email to me (the web developer) when the error occurs? I am pretty sure my company requires a username/pwd to send emails via SMPT on the ms exchange server.
View 1 RepliesTo be able to implement paging i need to create a helper class (as mentioned on one example in the net ); so i have created a class that encapsulate the paging logic
public class PagingList<T> : List<T>
.
..
but when i reference this class in my view using the code below:-
Models.PagingList<Article>
The following error occurred. Server Error in '/' Application. Compilation Error Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0246: The type or namespace name 'Article' could not be found (are you missing a using directive or an assembly reference?) Source Error:
[Code]....
Source File: c:UsersMohannadAppDataLocalTempTemporary ASP.NET Files
oot1f3f505f568b8e69App_Web_index.aspx.82d38c66.ffjpt45i.0.cs Line: 172
Show Detailed Compiler Output:
Using Visual Studio 2005
I have list of class files, when i try to run the class files, it showing error as
"a project with output type of class library cannot be started directly"
How to run the class file? How to create a dll file.
I have all my errors handling up and going but now I wish to change the error messages that they display for empty integers.I have been going through my codes but I can't to change that. For now, the error message for all numeric values are "A values is required" and I wish to change it to "<TextBoxName> cannot be empty".
View 10 RepliesI'm developing my 1st MVC app using nerddinner as sample, appreciated approach. but when I come to handling error in Edit Post action using a partial class of Entitie2(include the FK) and adding roleviolations to a propertie it work just I don't know how I could validate input for a propertie in the other Entite(N:1)?
View 6 RepliesPossible Duplicate: Best practices for exception management in JAVA or C# I am using class libraries and I try to put maximum code in class libraries so that it can be reused in other projects.Please advice me where I should put try catch blocks in class library functions or in front end forms (aspx pages) ?
View 3 RepliesI want to do a bulk insert of data from a tab-seperated file into a MSSQL database using Linq to SQL. I have put all the inserts lined up on InsertAllOnSubmit(). Now, can anyone tell me if an exception occurs in one of the inserts, do the previous inserts rollback or the process stops or it skips that insert?
View 1 RepliesDoes it make sense to do error handling and logging inside actions methods or handle the OnException method inside the controllers. One way means writing try/catches in all the action methods even when there is nothing to be done to recover from the error. Handling this at the controller level would allow logging and redirection to an error handler page without writing try/catches inside all the action methods.
Which method makes the most sense? Here is example code of try/catches in an action method.
[HttpPost]
public ActionResult Delete(int id)
{[code]...
i have a webpage built in asp.net c#. it always a user to create a new record in a db table. there are there are two input fields, text and score. text cannot be a null value so if the user doesn't input text onsubmit, the page errors out. i want to throw in some simple error handling code in the code behind page. i've tried including an if/else on_inserted method but ran into some java script errors.
[code]....
I created an ASHX file and use it to handle async file uploads.Since the site might not be hosted on our servers, I want to check for write permissions and delete permissions and supply the end user (site content editor in this case) with an error they can deal with.
Im using uploadify for the upload, Im not sure, but I`m guessing this complicates the return of a message that can be shown on the page, but maybe not.
I need to create application wide error handling mechanism. I was evaluating Action Filter for that matter. But- Action filter will just exectute against actions/controller- what about error at custom view engine or Extension method for HTML helper.: to handle them i need to implement traditional Asp.net mechanismCan anyone suggest best common approach which can handle error for all Controller, View, Model or custom helpers if any.
View 3 RepliesI use Custom errors in my web.config. It works for urls like www.x.com/x.aspx , but when I write something like :
www.x.com/name (I have Application_BeginRequest dealing with it on global.asax) on the live server, IIS bypasses my application and shows its own error page.
How can I disable IIS error handling and redirect where I want to?
I redirect Errors to Error.aspx
<system.web>
<customErrors defaultRedirect="error.aspx" mode="On">
error redirect="error.aspx" statusCode="500" />
</system.web>
and the problem is that there is also second error in ErrorMasterPage of Error.aspx
<script Language="C#" MasterPageFile="~/ErrorMaster.Master" runat="Server">
and CustomError can not handle the second error while its like a loop ( it will redirect to error.aspx and Masterpage of Error.aspx has Error.
Example:
Login.aspx(has Error) -> Error.aspx -> ErrorMasterPage.Master (has Error) -> Show Yellow Page
I have introduced site wide exception handling on my site to catch unexpected errors. The event handler sends a message to me when such an exception occurs. But the problem is that any clicks on my site will cause an exception to be thrown with the message: "This is an invalid webresource request."
I googled for an answer and only found a couple of references to 1. setting a fixed machinekey (which for some reason didn't work for me, I got an error saying that the virtual directory wasn't set in IIS, and as far as I know I'm not using IIS at all, I'm using the local development environment and then deploy to a web host) or 2. using a robots.txt file to stop robots from accessing the axd files, but that doesn't help either because it's not robots that cause the problem, anyone clicking around on the page will cause this error. how to solve this problem properly? For now I have handled it by catching and ignoring this particular error by the text in the error message, which works but I would rather fix it so that this error doesn't occur at all.
[Code]....
how can i show the full blown .net exception that may occur on an ajax enabled page. i want it to show like it would if the page wasnt using ajax. This for my QA environment for which i dont have the option to temporarily disable update panel. Also i dont want javascript to handle it as our QA testers are wanting to see the usual full blown asp.net exception.
View 1 RepliesI want to implement an app-wide error handling mechanism for an ASP.NET MVC2 web app. What is the standard way to do this?
I want to make sure that the user never sees a 404 error, a 500 error, or a core dump.
I have what is probably a basic question, but I am rather new to writing exception handling code. I thought I understood the concept, but apparently I don't, heres the code:
[Code]....
If I enter in any non-integer values, the textbox is set to nothing and the label displays the error message. However, now that I have verified the textbox contains an integer, I want to continue on and use that value. The remaining code works fine unless there was an exception, in which case the conversion to an int value for x throws an error.
All the examples I have looked at demos the structure of try-catch-finally, but in this instance I am not performing any clean up, I want to execute code when a valid value is entered into the textbox.
Can any body give me code to impement ELMAH error handling for my asp.net mvc application.. I need to know step by step process to implemnt?
View 2 RepliesI've got a .aspx page which loads a user control using the LoadControl(string virtualPath) method. The loaded control contains references to several other user controls (i will call "modules"). If such a module contains an unhandled coding error which isn't catched at compile time (e.g. division by zero), no helpful error is thrown. The .aspx page just gets an error from the LoadControl method that the control to load cannot be found (404), but in fact it contains a faulty module.
Is it possible to get the error of the module from within the .aspx page for better troubleshooting? Can I get information about, that (in this example) there is a division by zero error in module (nested user control) xy?
I attempted to find any information in regards to best practices of handling errors inside of a HttpModule unfortunately I can't seem to find any information on Google in regards to this.
All the information I've found all pertains in how to use the global.asax or a custom http module to log errors which is completely not pertinent.
Edit: Clearly this question has been misunderstood. I am seeking information regarding software patterns that are employed to prevent a HttpModules from faulting, triggering custom errors redirection, and faulting again causing infinite exception chains until IIS shuts down the thread entirely.
This however is very nontrivial since the HttpSessionState collection can't be depended on for the life cycle of HttpModules. Since error conditions have already occurred it would be improper to expect that I could read the ASP.NET session cookie to get an identifier that I could store user specific data in the application cache. Storing data in the HttpRequest.Items collection would be pointless since that in no way exists across multiple requests.
It would seem so to me, because nearly all exceptions thrown downstream of whatever routes requests to controllers, will be thrown in a controller or something downstream from a controller. There is nothing upstream from a controller except a view, which is simply a presentation of what happened in the controller.
View 4 RepliesI'm working on a small web application, and I wanted the user to be redirected to a simple error page anytime an exception was encountered. So I wanted to redirect the user to generic Error page "Oooops.aspx" that will log the error in page_load.
I'm thinking that I can use Application_Error in Global.asax, where I can redirect to "Oooops.aspx" so that it displays a friendly error page and it logs the exception (through Server.GetLastError()). I can also use web.config and add "<customErrors mode="On" defaultRedirect="Oooops.aspx"/>" It'll redirect me to a friendly error page and it will also log the exception. What's the difference between these two? Should I use both of them, or just one? And which should I use?