Asp Javascript On Error Resume Next
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about classic asp on error resume next Stack Overflow the company Business Learn more about hiring developers or posting ads with classic asp on error resume next example us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is try catch javascript a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up On Error Resume Next in Javascript? up vote 1 down vote favorite 1 Does
Javascript Try Catch Continue
try ... catch(e) provide the same service as On Error Resume Next in VB? I have a page which uses several JQuery plugins as well as some functions I have written myself. It would take a lot of work to address all possible exceptions. For now, I want to tell the script not to break on would be fatal errors. How do I do that when I'm using plugins? javascript javascript ignore error and continue exception-handling share|improve this question asked Jun 4 '10 at 22:51 Majid Fouladpour 8,6391446103 1 An exception is exceptional, how can you continue to run the script if everything is messed up? :) –user216441 Jun 4 '10 at 22:54 1 Not everything is messed up. Rather, only something around 10% ;) –Majid Fouladpour Jun 4 '10 at 22:59 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted Yes, try/catch provides a way to capture errors, though unlike On Error Resume Next you choose to deal with the error in the catch block or not at all. So in VB you might have done: on error resume next DoSomethingUnsavory if err.number <> 0 then ... on error goto 0 ' you DO do this, right? In JS you'd do the following: try { doSomethingUnsavory(); } catch (e) { // handle the unsavoriness if needed } Of course empty catch blocks are evil so don't leave them in production code yadda yadda. The best thing is to let the errors occur and fix them. Fail fast! share|improve this answer answered Jun 4 '10 at 23:04 roufamatic 11k44171 Thank you. The error I'm dealing with is caused by validation plugin on nested f
version of "On error resume next" If this is your first visit, be sure to check out the FAQ javascript settimeout by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 2 of 2 Thread: Javascript version of "On error resume next" Tweet Thread Tools http://stackoverflow.com/questions/2978291/on-error-resume-next-in-javascript Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 11-29-199908:26 AM #1 Scott Moore Guest Javascript version of "On error resume next" Hi,
I'm opening my db, which is working fine, but I need to code, in case the db is down or http://www.aspmessageboard.com/showthread.php?7679-Javascript-version-of-On-error-resume-next for some reason the user cannot connect to the db. I'm using JavaScript, instead of VBScript (inside ASP). Is there an equivalent to "On error resume next". I'll need to check if the open() failed. Here is my code
Session("objConn") = "";
Session("objRS") = "";
Session("objConn") = Server.CreateObject("ADODB.Connection");
Session("objConn").ConnectionString = "DSN=CCPR;uid=sa"
Session("objConn").Open();
if (Session("objConn").Errors.Count > 0)
{
// An error ocurred trying to connect to the database
Session("m_db_error") = "true"
}
Thanks,Scott Reply With Quote 11-29-199903:43 PM #2 Scott Mitchell View Profile View Forum Posts Senior Member Join Date Dec 1969 Posts 2,849 RE: Javascript version of You have to use the try / catch syntax for JScript error handling. Check out:
http://msdn.microsoft.com/scripting/default.htm?/scripting/jscript/doc/jsstmtrycatch.htm
This is Microsoft's documentation on the try / catch syntax.
Happy Programming! Reply With Quote Quick Navigation Database (ADO/SQL/Access) Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums ASP Technology ASP.NET ASP Database (ADO/SQL/Access) Advanced ASP ASP Components ASP Performance Client-Side Technology HTML/CSS JavaScript/JScript Programm
JavaScript, has been maturing since the dark ages of Netscape and IE4. No longer are you forced to settle for what the browser throws in your face in an event of a JavaScript error, but instead can http://www.javascriptkit.com/javatutors/trycatch.shtml take the matter into your own hands. The try/catch/finally statement of JavaScript lets you dip your toes into error prune territory and "reroute" when a JavaScript "exception" is encountered. Along with other defensive coding techniques such as Object detection and the onError event, try/catch/finally adds the ability to navigate around certain errors that in the past would have instantly stopped your script at its tracks. on error No more! try/catch/finally try/catch/finally are so called exception handling statements in JavaScript. An exception is an error that occurs at runtime due to an illegal operation during execution. Examples of exceptions include trying to reference an undefined variable, or calling a non existent method. This versus syntax errors, which are errors that occur when there is a problem with your JavaScript syntax. Consider the following examples on error resume of syntax errors versus exceptions: alert("I am missing a closing parenthesis //syntax error alert(x) //exception assuming "x" isn't defined yet undefinedfunction() //exception try/catch/finally lets you deal with exceptions gracefully. It does not catch syntax errors, however (for those, you need to use the onerror event). Normally whenever the browser runs into an exception somewhere in a JavaScript code, it displays an error message to the user while aborting the execution of the remaining code. You can put a lid on this behaviour and handle the error the way you see fit using try/catch/finally. At its simplest you'd just use try/catch to try and run some code, and in the event of any exceptions, suppress them: try{ undefinedfunction() } catch(e){ //catch and just suppress error } Assuming undefinedfunction() is undefined, when the browser runs the above, no errors will be shown. The syntax for try/catch/finally is a try clause followed by either a catch or finally clause (at least one or both of them). The catch clause if defined traps any errors that has occurred from try, and is indirectly passed the error object that contains additional info about the error. Lets see a slightly more comp