.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Basic Instincts: Stay Error Free With Error Corrections

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

Error corrections are an essential part of the Visual Basic coding experience. This article explores the many error correction features offered by Visual Basic and provides a glimpse at the future release of Visual Studio 2010.

Dustin Campbell

MSDN Magazine July 2009

View Complete Post

More Related Resource Links

Very Basic Question - Error message running first page


Hi Everyone,

I am running Windows 7 and I have gone into Control Panel and activated all of the IIS Functions.

The web application I am running was downloaded from the net (and has worked on other machines previously).  Once I downloaded it, I moved it into C:/inetpub/wwwroot/code/main.asp

I am a bit of a novice at this!  But I am hoping someone can point me in the right direction!


I get the following error when I try and run the web application through IE:

"An error occurred on the server when processing the URL. Please contact the system administrator. If you are the system administrator please click here to find out more about this error."

(When i click the "click here" button it just goes to the IIS site).


Appreciate any help I can get!




.NET Exceptions: Make the Transition from Traditional Visual Basic Error Handling to the Object-Orie


If you're used to Visual Basic 6.0 and you're making the transition to Microsoft .NET, you will find that error handling is quite different from what you've used for years. Visual Basic .NET uses a more object-oriented solution to signaling and responding to unexpected problems while your program is running. This approach, called structured exception handling, has a number of advantages over the On Error statements provided in previous versions of Visual Basic. For instance, exceptions give you lots more information about exactly what went wrong in your app. To help you take advantage of this modern error handling paradigm, this article will show you how to raise and respond to exceptions, as well as how to create your own custom exception classes.

Jesse Liberty

MSDN Magazine November 2002

how to write error free in js file

When i add the below code in the javascript file (JS file ) i am getting error :   adding below code in the apsx page do not have problem <script src="http://munchkin.marketo.net/munchkin.js" type="text/javascript"></script> <script>mktoMunchkin("476-IFP-265");</script>   converting the above to include in anotehr js file gettign error : unknown error mktoMunchkin in IE 7 document.write('<script type="text/javascript" src="http://munchkin.marketo.net/munchkin.js"></script>');document.write('<script type="text/javascript">mktoMunchkin("476-IFP-265");</scr' + 'ipt>');   am i doing any error please let me know Thanks in advance      

Merge Replication: Web Sync error 28011 with Basic Authentication on WinCE 6.0



I configured merge replication using SQL Server 2005 SP3 running on Windows Server 2008 R2 x64 with IIS 7.

My client is a .NET Compact 3.5 (RTM) application running on an embedded controller (Beckhoff CX1000) with Windows CE 6.0 installed. I am using SQL Compact 3.5 SP1 on the client. The preconfigured Win CE only had .NET Compact 2.0 installed, so I installed version 3.5 on the CompactFlash card attached to the controller.

Syncing over HTTP works perfecly using anonymous authentication.

I then executed the Web Sync Config Wizard and configured Basic Authentication without SSL. For authentication I use a local account even though my server is a member of our domain. The same account is used for access to the publication and distribution DBs (all located on the same server running IIS).

When I ran my client trying to sync, all I get is the 28011 error (Authentication failed).

The strange thing is that a test application on my desktop machine using .NET 3.5 (not Compact) can sync without problems. I even wrote a little test application for the embedded controller using the .NET HttpWebRequest object to connect to the server and I get the expected "Microsoft SQL Server Compact Server Agent" message.

I dug a little deeper into the issue and analyzed the HTTP packet getting sent to the server (using Wireshark). App

Visual Basic 9.0 error in Visual Studio 2010


I just upgraded from Visual Studio 2005 to Visual Studio 2010 yesterday. I tried opening my site; it started the conversion wizard and seemed to work OK. However, I get the error "Visual Basic 9.0 does not support this kind of lambda expression." Here is my code:

Dim MatchLength As Integer = Url.Path.Length
                        Dim D As GetRedirectedUrlDelegate = _
          Dim NewQuerystring As QuerystringContext = Url.QuerystringContext.Clone()
          Return Url.Clone(NewPath, NewQuerystring)
        End Function

            Match = New RedirectMatch(MatchLength, d)
            Return True

The error is on the "Function()" line. I thought multi-line lambda functions were one of the new VS2010 features. Why am I getting a VB9.0 error

Visual Basic Web Browser Error


Hello Fellow Programmers! I have programmed a web browser with Visual Basic 2010 Express and came across a major bug. Whenever I try to click a checkbox on a certain website, this error message appears:

An error has occurred in the script on this page.

Line:       193

Char:      9

Code:     0

URL:       http://cdn1.weebly.com/weebly/images/common/weebly.js

              Do you want to continue running scripts on this page?

                       [Yes]                      [No]


After clicking yes or no it just pops up again and I have to open the Task Manager just to close the browser. I'm thinking that there may be an extra piece of code I must put in for JavaScript but I'm really just lost at this stage. Please, if you know something about this please let me know!

connection error s basic Edition of Management Studio in vb.08


when-ever i connect A data in SQL Server Management Studio Express   Edition. had had problem connecting A data  with  basic edition  vb vb studio. then had to detach said data and connect  the SAME DATA (A) name it B. if there is any solution. please advice me.


sorry. for poor expression and stupidy. i m very much fresh on vb.net and SQL SERVER.

thanking you in advance




IsapiModule Error 500 Issue


I am about exhausted trying to figure out this error:

HTTP Error 500.0 - Internal Server Error

Description: The page cannot be displayed because an internal server error has occurred.

Error Code: 0x8007007b

Notification: ExecuteRequestHandler

Module: IsapiModule

Requested URL: http://localhost:80/ReportServer

Physical Path: c:\Program Files\Microsoft SQL Server\MSSQL.2\Reporting Services\ReportServer

When I enable Failed Request Tracing Rules and view the log output I am supposing that the actual problem is in the 2nd call where there are 2 backslashes before the actual filename in the specified path:


CALL_ISAPI_EXTENSION DllName="C:\Windows\Microsoft.NET\Framework\v2.0.50727\\aspnet_isapi.dll"


Handling 404 page not found with Error page



      How do i handle 404 page not found?

Inserting personal error message in ValidationSummary



I am creating a web form that requires a lot of validation. I use many of the validation control in asp.net already like RequiredFieldValidator and CompareValidator. 

My Problem: after my custom validation for the value entered return an error message, and I pressed enter key when the field is empty, my custom error message is overlapped by my ValidationSummary. 

Setting my custom error to visible = false on button click also does not seem to work as it requires for me to enter the value first.

This made me think, is there a way to insert my custom validation inside the ValidationSummary as an error message like for other validation control?

Thanks in advance

Sys.Net.WebServiceFailedException: The server method '' failed with the following error:



Let's say we have 2 time consuming functions, aaa and aaa1 inside a aspx page.

        public static string aaa(int i)
            return i.ToString();

        public static string aaa1(int i)
            return i.ToString();



        <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
        <span id="displayspan"></span>
        <br />
        <input type="button" value=

Jscript error: Object does not support property or method


 Hi, i have little knowledge on javascript but i need to use this code get from somewhere for a jquery to work.

I face this "Jscript runtime error: Object does not support property or method" whenever im trying to run this page.

In my experience, im get this error msg 9 out of 10 times i use javascript in my system.

Im using Microsoft Visual web developer 2008, i wonder if this is related to my problem, i not sure there is anything i need to add as reference or update anything.

But anyway, in short, i just couldn't use javascript code when using this development tool because of this sort of error.

Anyway, it happen that last time i tried use the same type of jquery code in another project and it seems to work well without an error.

But now when im try to use it again in this recent project i created, it come out with this error and i have no idea how to solve it even look through google and this forum.

It doesn't really seems like its the code problem itself although im not sure, because any javascript code just couldn't work.

So below is my code that i need to use.

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" ></script>
<script type="text/javascript" src=&quo

Type or namespace error.


A couple of days ago I started getting an unusual behavior when compiling Website projects. I have referenced class libraries added to my bin folder that are also correctely referenced in using statements in my aspx.cs code behind. When I compile, I get the 

Error 4 The type or namespace name 'CommonClassLibrary' could not be found (are you missing a using directive or an assembly reference?) C:\Dev\Fiscal_Portal\Implementation\FMS Portal Site_new\App_Code\BLL\DataTables.cs 1 7 C:\...\FMS Portal Site_new\

The type or namespace name 'CommonClassLibrary' could not be found (are you missing a using directive or an assembly reference?)

error message that would typically be received when the dll has not been added as a reference or added in a using statement.

I can eliminate the error by adding an


HTTP Error 403 - Forbidden


(VB Express website directed me to ASP.NET Web Services which in turn redirected me to this forum).

 Hopefully someone can help me here...... 

I am using VIsual Web Developer and downloaded the small business application to use as a starting point to help my wife get a website up for her small business. When I load the application, I can F5 and it runs fine but as soon as I make any modification to the app and hit F5, I get the HTTP Error 403 - Forbidden when it tries to show the website.

I notice a pop up that occurs when I run that allows me to choose the link for my app and it displays correctly (I close the webpage that has the error on it).

This seems like a pain, is there a setting I'm missing - I would think that this should "just work".

What's up?????



Webmatrix error


When i try to do anything in webmatrix it shuts down.   i get this error in the log

pplication: WebMatrix.exe
Framework Version: v4.0.30319
Description: The application requested process termination through System.Environment.FailFast(string message).
Message: Unrecoverable system error.
   at System.Environment.FailFast(System.String)
   at MS.Internal.Invariant.FailFast(System.String, System.String)

Insert Error not helpful



I am using VS2010

When I try to updated or insert a record in my User table I am getting an error that does not make sense to me and I cannot figure out what is wrong.

Also, when I try to insert a new record I get a validation error saying that the Id is required. However it is an identity field in the db so it should not be necessary to send it to the server.

Could you please shed some light?


An error has occurred.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: Microsoft.Web.UI.WebControls.EntityOperationException: An error has occurred.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Stack Trace:

[EntityOperationException: An error has occurred.]
   Microsoft.Web.UI.WebControls.DomainDataSourceView.PerformCudOperation(ChangeSetEntry operation, Action`1 operationPerformingEvent, Action`1 operationPerformedEvent) +331
   Microsoft.Web.UI.WebControls.DomainDataSourceView.UpdateObject(Object oldEntity, O

Error when updating. Supposedly updating ID without being asked.



Server Error in '/' Application.

Value of member 'ID' of an object of type 'Ref' changed.
A member defining the identity of the object cannot be changed.
Consider adding a new object with new identity and deleting the existing one instead.

I get this error whenever I attempt to update an entry. Even an entry that has had nothing altered. I have tried to circumvent it but I think it must be a simple oversight. How could I have caused an ID update using the Edit.aspx page of dynamic data? Thank you in advance for the help!

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend