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exit on error vb.net Durkee, Oregon

For example, you may want to inherit from the IOException class, or the FileNotFoundException. Try s = File.Open(txtFileName.Text, FileMode.Open) lngSize = s.Length s.Close() Catch e As Exception Throw (New FileNotFoundException( _ "Unable to open the specified file.", e)) End Try End Sub Running Code Unconditionally Many developers creating code that is called by others simply return an error value to indicate success or failure, instead of raising an error on failure. Option Explicit On Option Strict On Public Class Form1 Private Sub HandledError1(ByVal upLimit As Integer) Dim test As Short Dim ourArray(3) As Integer Try test = 16000 test *= test Catch

Anyway, you might wonder why such a simple thing as error handling needs such an in depth tutorial - even on this basic level. Email: (never displayed)*Email is optional, but if you enter one at least make sure it is valid. (will show your gravatar) Comment: *I do want to hear your thoughts. You could, and probably should, have more code to handle the errors where the message box is. No, no, no!

Further, since they have one choice, OK, it will always end the program At any rate, MessageBox is a function returning a DialogResult you can evaluate. Therefore, a single class/method does not have access to them all. Environment.Exit Ted:Start the new application BEFORE closing the first one.e.g.System.Diagnostics.Process.Start(System.Windows.Forms.Application.ExecutablePath);System.Environment.Exit(0); Left by Kris on May 29, 2007 3:03 PM # re: Application.Exit vs. Try TestThrow() Catch e As FileNotFoundException MessageBox.Show("Error occurred: " & e.Message) ' Use e.InnerException to get to error ' that triggered this one.

This example displays the fabricated error message, along with the text associated with the original exception: Copy ' Throw Exception option on the sample form. If that procedure includes error handling, the runtime will use that code. Put the error handling code where you can take care of the error in some intelligent way. The content you requested has been removed.

Please mark the replies as answers if they help or unmark if not. Because your code can trap for specific exceptions, creating your own Exception class gives you a lot of flexibility. The End statement can be placed anywhere in a procedure to end code execution, close files opened with an Open statement, and clears variables at module and class level and all You may also wish to make the original exception information available to the caller, in addition to the exception your code raises.

I want the form to remain up, but the execution of code to cease after I choose "Cancel". If you run into an error that is going to require termination, you should bubble the exception up to the main try...catch block you have around your main message loop. If no procedures include error handling, all the way back to the first-called procedure, the .NET runtime handles the error itself, as in Figure 2. Raising Errors You may want to raise errors out of your procedures, indicating to callers that some exception has occurred.

If it can't find any appropriate Catch block all the way up the call stack, the runtime handles the exception itself (as shown earlier in Figure 2). With the release of the .NET common language runtime, this type of error handling is available to all the .NET languages including, Visual Basic .NET. Using Environment.Exit, everything is ok.I'm using C# 2005 Express Left by Taoge on Apr 18, 2007 9:42 PM # re: Application.Exit vs. What is the real difference between the following three statements: System.Environment.Exit(-1) System.Windows.Forms.Application.Exit() End ' Visual Basic only They can all get you to where you want to go, application shutdown,

Left by Ahmad on Jan 11, 2007 2:10 PM # re: Application.Exit vs. Try deleting your text box and/or your stopwatch and see if it exits w/o error. I am working through the logic I want to execute after publishing/logging is done. I've also have the error routine returning the value of the message box response so that the middle routine can react to it intelligently.

You might want to simply pass back a standard runtime exception provided by the .NET Framework, or you might want to create your own exception condition. I really don't know when I'd use it but it's there in case you need it. NO! Use this sample form to demonstrate all the different features discussed here.

That's so elegant, and when this site scores, it really sings. They can easily hide the complexity of a process from… MS Access Visual Basic Classic Advertise Here 769 members asked questions and received personalized solutions in the past 7 days. EDIT: To clarify, I don't care how this is achieved, I just want the application to stop running, and have no errors occur. Environment.Exit Comments (39) | Share While refining my unhandled exception handler code, I wandered into this question.

Don't see me!". System.Windows.Forms.application.Exit() acts like an End, with the entire program shutting down, although as he indicated, the syntax is more to VB.Net's liking. I have an application in which i create a thread. Run program. 2.

Private Sub WhichException() Dim lngSize As Long Dim s As FileStream ' Now you can at least tell what went wrong! I am currently thinking the "Finally" Block. They allow you to create self-contained objects that encapsulate functionality. However if there is an error you want to close the connection and then jump out of the sub.

This is just great. asked 3 years ago viewed 22945 times active 3 years ago Related 2Editing VB.net code without stopping executable1VB - Get Visual Studios 2010 to stop recommending VB6 code0Visual Basic: How to Can anyone provide a better solution? –Kato Jan 24 '14 at 3:22 you only show one IF statement –Plutonix Jan 24 '14 at 3:28 add a comment| 2 Answers I'm embarrassed i had to google this to find out how to bloody exit my C# app. :( Left by Free cursors on Mar 09, 2009 8:28 PM # re: Application.Exit

Left by kien on Oct 31, 2007 7:10 PM # re: Application.Exit vs. So I call instead Environment.Exit(0) and it(thread) stop at the same time application stops. How can I do that? This documentation is archived and is not being maintained.

If the error is a validation issue, you should consider checking for that stuff up front prior to sending data into the depths of your application. 0 LVL 25 Overall: I dont want that, and I would like to completely close the application after showing the MsgBox. Because of this I strongly suggest that you do not - repeat not - use error handling as a substitute for checking data before you try to use it. One reason to use procedures (subs or functions) is that we want to use the same code in different places in our programs, we do this by calling procedures from these

VB 2012 Error Checking Isn't Working Input Error Checking Using IsNumeric Stopping A Program Error Message Shows, But Results (null) Still Outputing Insert Error: Column Name Or Number Of Supplied Values