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exception error number in vb.net Cuyahoga Falls, Ohio

Raising Errors You may want to raise errors out of your procedures, indicating to callers that some exception has occurred. You can set up your handler to catch different types of exceptions as follows: Code: Try System.IO.File.Delete("c:\test.txt")Catch ex As System.IO.FileNotFoundException 'StatementsCatch ex As System.IO.IOException 'StatementsCatch ex As System.Exception s = Nothing End Try End Sub Tip   Although your Try/End Try block must contain either one or more Catch blocks, or a Finally block, it needn't contain both. We have an abort email that is sent out when a process aborts that gives us the err.number and err.description but I would like to know where is actually errors out.

If you want to run code before the runtime leaves your procedure, you need to include a Finally block. Code: Catch ex As System.ServiceProcess.TimeoutException Volte View Public Profile Visit Volte's homepage! For example, Figure 3, captured from the .NET Framework documentation, makes it easy to determine what might go wrong when calling the File.Open method. Call back to MyBase.New to include the call to the base class' constructor.

Go to top Permalink | Advertise | Privacy | Terms of Use | Mobile Web02 | 2.8.161013.1 | Last Updated 2 Apr 2006 Article Copyright 2006 by Ujwal WatguleEverything else Copyright How is the Heartbleed exploit even possible? That is, a Finally block without Catch blocks is fine. The example here uses the final constructor, passing back the inner exception.

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That's the usual practice. -- Jon Skeet - http://www.pobox.com/~skeet If replying to the group, please do not mail me too Nov 21 '05 #2 P: n/a Michel Walsh Hi, There Hi Every one, i am using the try Catch block.. Find all posts by Volte #12 01-24-2003, 08:04 PM donaldc104 FreshmanPreferred language:VB.NET Join Date: Jan 2003 Posts: 32 How to reference ServiceProcess? You don't want to rely on the GetHashCode method.

If you simply want to display an error message indicating the particular error that you've trapped, you can use the Message property of the Exception class, like this: Copy ' Which Thanks RSB Nov 21 '05 #1 Post Reply Share this Question 7 Replies P: n/a Jon Skeet [C# MVP] RSB wrote: i am using the try Catch block.. thanks "Michel Walsh" wrote in message news:ek**************@TK2MSFTNGP11.phx.gbl... Private Sub MultipleExceptions() Dim lngSize As Long Dim s As FileStream Try s = File.Open(txtFileName.Text, FileMode.Open) lngSize = s.Length s.Close() Catch e As ArgumentException MessageBox.Show( _ "You specified an invalid filename.

It is significantly faster in large applications than unstructured exception handling and allows more flexible response to errors as well as greater application reliability. You can pass in no parameters (you'll get a generic Exception object, with default values for its properties); a string indicating the error message you want sent back to the caller; Source String expression representing the object or application that generated the error. Browse other questions tagged vb.net exception-handling try-catch or ask your own question.

This code often performs clean-up tasks, such as closing files or clearing buffers. You can place the error-handling routine where the error would occur rather than transferring control to another location within the procedure. You may also wish to make the original exception information available to the caller, in addition to the exception your code raises. You can do this using the StackTrace class and its members.

The next section digs into how you can add this functionality to your procedures. The .NET runtime handles Catch blocks in order, looking for an "is a" match against the current exception. In that case, you'll find that the constructor for the Exception class provides an overloaded version that allows you to specify the inner exception. Table 1 Exception Class Thrown when Derived Classes AppDomainUnloadedException Attempt made to access an unloaded application domain None ArgumentException One or more of the arguments provided to a method is not

ExitHere: ' Perform cleanup code here. ' Disregard errors in this ' cleanup code. HRESULT is a 32-bit value that contains three fields: a severity code, a facility code, and an error code. The facility code identifies the area of the system responsible for the exception. System.Exception is the class from which the .NET Framework derives the pre-defined common language runtime exception classes.

If an exception occurs within your procedure, the .NET runtime will look for an appropriate exception handler, and that may mean it leaves your procedure (if there's no Catch block, this and the Exception object has a Message Property but i want to Catch the Error Number so that based on the Error number i can display Different error message.... Find all posts by Volte #16 01-26-2003, 01:38 AM donaldc104 FreshmanPreferred language:VB.NET Join Date: Jan 2003 Posts: 32 Immediate problem fixed - thanks! See ASP.NET Ajax CDN Terms of Use – http://www.asp.net/ajaxlibrary/CDN.ashx. ]]> Developer Network Developer Network Developer Sign in MSDN subscriptions

In fact, an error, which is an event that happens during the execution of code, interrupts or disrupts the code's normal flow and creates an exception object. or KNG Consulting Show: Inherited Protected Print Export (0) Print Export (0) Share IN THIS ARTICLE Is this page helpful? Beyond stating that something went wrong, messages resulting from exception handling should indicate why and where it went wrong. Sorry to ask such basic questions.

Here's what I tried. Some exceptions, if handled by managed code, may embed themselves as inner exceptions. Copyright © 2002 Informant Communications Group and Microsoft Corporation Technical editing: PDSA, Inc. It includes considerations that help you choose the right exception-handling alternative, the approaches involved in each alternative, how to create your own exceptions, and the exception object's properties.

Error Handling in Visual Basic .NET   Ken Getz MCW Technologies February 2002 Summary: Discusses how error handling differs between Visual Basic .NET and Visual Basic 6.0. In Visual Basic 6.0, this meant adding a Select Case block based on the active error number. The FileTooLargeException Class The sample project includes the following class definition (within the frmErrors.vb module), providing the definition for the FileTooLargeException: Copy Public Class FileTooLargeException Inherits ApplicationException Private mlngFileSize As Long No luck (only obscure SQL timeouts).

Not very high tech, I admit my culpability... More about.... In this case, exceptions you do handle won't be passed back out, but those you don't handle will be thrown back to the calling procedure. Good Term For "Mild" Error (Software) What is a type system?

Handle all errors.