Access Odbc Error Handling
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from ODBC. Some of them are cryptic even to developers, let alone end users. They are also notoriously difficult to handle. For bound forms the Form_Error event gives very xml error handling little information. For unbound scenarios the Errors collection is better, but you are visual basic error handling still stuck with cryptic messages. In this blog post we will present an integrated way to deal with ODBC errors: sql error handling in function how to intercept them and how to transform them into user-friendly messages. The details are interesting and somewhat complex, but abstracted away for those developers who just want to get things done. 2 lines https://support.microsoft.com/en-us/kb/209855 of code are all that it takes. Example Here is an example of such message. Using the database and Access client application in the download package I copied the "Row Guid" value from the first record into the second record and saved it: The text on this message is: ODBC--call failed. [Microsoft][SQL Server Native Client 11.0][SQL Server]Violation of UNIQUE KEY constraint 'AK_SalesOrderHeader_rowguid'. Cannot insert duplicate key in object http://www.accessmvp.com/TomvanStiphout/OdbcErrors.htm 'SalesLT.SalesOrderHeader'. The duplicate key value is (b3339719-1b0f-4ad0-a2e4-d1d6e5e6e22b). (#2627) [Microsoft][SQL Server Native Client 11.0][SQL Server]The statement has been terminated. (#3621) The error occurs because saving the record violates a database rule that says that the values in the rowguid field must be unique. Of course we should use best practices to ensure that we minimize errors like this from occurring. In this case the rowguid field would probably not even be on our form. In many cases we can check for upcoming violations before the record is saved, for example in the Form_BeforeUpdate event. But that still leaves the errors that fall between the cracks or that we simply did not want to check for because it would be too expensive. We typically don't want to repeat all database logic in our application. Often it is better to let the error happen and handle it gracefully. At the end of this blog post the error will have been intercepted and transformed to: Database error: 'Row Guid' must be unique. A record with this value already exists. Built-in Options for Handling ODBC Errors Access has three built-in options for handling errors. First is the "On Error" statement which sets up an error hand
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta http://stackoverflow.com/questions/18335788/catching-microsoft-access-odbc-connection-errors-to-sql-server-linked-tables Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack http://www.tek-tips.com/viewthread.cfm?qid=1252535 Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping error handling each other. Join them; it only takes a minute: Sign up Catching Microsoft Access ODBC connection errors to SQL Server linked tables up vote 1 down vote favorite 1 I have a little Access application with linked tables to SQL Server that I use at a couple different sites so the SQL server names and sometimes the sql error handling SQL database and odbc connection names are different from site to site. However they use the Access Runtime to use it so don't have the ability to relink tables without the full version. I'm struggling to find a way to catch any ODBC connection errors and then offering them the option to relink the tables by typing in the ODBC connection name etc. and then relinking through VBA code which I believe is possible. (http://www.access-programmers.co.uk/forums/showthread.php?t=143180 for example) The database loads immediately on a form with a record source on a linked table so it needs to catch the error on that form if possible. I guess I can add a main menu with a button to relink tables there but would prefer avoiding introducing a menu form which requires an extra click for users. Have found these articles but I'm unable to catch the initial odbc failure to connect in the form's On Error event and have tried the Activate event as well. Any suggestions would be highly appreciated! http://support.microsoft.com/kb/209855 http://www.access-programmers.co.uk/forums/showt
Join INTELLIGENT WORK FORUMSFOR COMPUTER PROFESSIONALS Log In Come Join Us! Are you aComputer / IT professional?Join Tek-Tips Forums! Talk With Other Members Be Notified Of ResponsesTo Your Posts Keyword Search One-Click Access To YourFavorite Forums Automated SignaturesOn Your Posts Best Of All, It's Free! Join Us! *Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.Tek-Tips Posting Policies Jobs Jobs from Indeed What: Where: jobs by Link To This Forum! Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.Just copy and paste the BBCode HTML Markdown MediaWiki reStructuredText code below into your site. Microsoft: Access Modules (VBA Coding) Forum at Tek-Tips HomeForumsProgrammersDBMS PackagesMicrosoft: Access Modules (VBA Coding) Forum ODBC connection - custom error handling thread705-1252535 Forum Search FAQs Links MVPs ODBC connection - custom error handling ODBC connection - custom error handling mrsbean (TechnicalUser) (OP) 10 Jul 06 23:41 I want to control the error message(s) which are received when/if an error is thrown when trying to connect to an external table in a SQL database.I have some code which refreshes the link to any/all linked tables.It works great.The user could muck it up by accidently typing the SQL server location incorrectly or entering a username password combination which is incorrect or which does not have the rights needed to view the data.In any of those cases, a large error message appears which goes something like (ignore typos as I used OCR to change a screen grab into text):CODEConnection failed:SQLState: 01S00SQL Server Error: 0[Microsoft][ODBC SQL Server Driver]lnvalid connection string attribute Connection failed:SQLState: 01000SQL Server Error: 53[Microsoft]IODBC SQL Server Driver ][DBNE TLIB]ConnectionO pen (Connect(fl. Connection failed:SQLState: 08001’SQL Server Error 17[Microsoftl(DDBC SQL Server Driver][DBNETLIB]SQL Server does not exist or access denied.In the function which refreshes the links, I have the following code to handle errors:CODEErrorHandlerExit:Exit FunctionErrorHandler:MsgBox Err.Number & " : " & Err.Description, vbExclamation, "ODBC Error"Resume ErrorHandlerExitI want better control of the error message which appears when it encounters an ODBC error.If this question is too complex to address in this setting, please refer me to a bo