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POWeb app, what is the proper way to catch exceptions, using the example here?
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  1. POWeb app, what is the proper way to catch exceptions, using the example here?
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    copied!<p>Lately, I've been reading on how to properly handle exceptions to improve my software (avoid catch generic exceptions and all), but I'm still a bit confused. Here is what I currently do (which violates some of the good practices, or maybe all of it)</p> <p>ASP.NET web app calls business layer, which in return calls data access layer. Log framework used is log4net, which will email me whenever an exception is logged. </p> <p>Data access layer catch generic exception (yeah, not good, as I don't know if a network could be the problem, or if an input to a store procedure is a wrong type, etc) log it as fatal and then "throw;" (to keep the stack trace). </p> <pre><code>catch(Exception ex) { log.Fatal("Exception occurred while inserting task into database",ex); throw; } </code></pre> <p>*<strong>Note</strong>, my data access layer assumes all input validations are done at the upper layers, but sometimes, I missed checking one or two parameters. </p> <p>Business layer catch "generic" exception as well (including the exception from data access), then wraps around a new exception as in </p> <pre><code> catch(Exception ex) { log.Fatal("Exception occurred while creating the task ", ex); throw new exception("There appears to be an error while doing [name of business operations]", ex) } </code></pre> <p>Web application layer catch any exception from the business layer and display the error message. </p> <pre><code>catch(Exception ex) { //show Ex.Message to the user on the current UI. } </code></pre> <p>In addition, to a global error message that redirects users to a generic "contact admin" error page. </p> <p>From all I have read, seems like I'm doing it ALL wrong. In that case, using the example above, how should I have properly handled exceptions at each level? </p> <ul> <li>Data Access </li> <li>Business Layer </li> <li>Web Application </li> </ul>
 

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