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POLogging in Asp.net MVC application using log4net
 

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    <p>Mine is a Asp.net MVC 4 application. I need to implement the following; As per log level set in web.config file (eg. 1/2/3/4)</p> <p>I have to log:</p> <p>1 :</p> <ul> <li>Methods start</li> <li>Methods end</li> <li>Application Warning</li> </ul> <p>Application Exception</p> <p>2:</p> <ul> <li>Application Warnings</li> <li>Application Exceptions</li> </ul> <p>3:</p> <ul> <li>Application Exceptions</li> </ul> <p>4:</p> <ul> <li>None</li> </ul> <p><strong>Further I need to achieve this using global filter(s).</strong></p> <p>kindly provide me some pointers.</p> <p>Thanks in advance.</p> <hr> <p><strong>Resolved</strong></p> <p>Following are my steps</p> <p>I created the following Filter class</p> <pre><code>[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)] public class LoggerFilterAttribute : ActionFilterAttribute { private ILog _objLog4Net = null; string logLevel = string.Empty; public override void OnActionExecuting(ActionExecutingContext filterContext) { _objLog4Net = LogManager.GetLogger(filterContext.RouteData.Values["controller"].ToString()); logLevel = GetLogLevel(); if (logLevel == "1") { _objLog4Net.Debug(string.Concat("Entered ", filterContext.Controller.GetType().ToString(), "'s ", filterContext.ActionDescriptor.ActionName, " method")); } } public override void OnActionExecuted(ActionExecutedContext filterContext) { _objLog4Net = LogManager.GetLogger(filterContext.RouteData.Values["controller"].ToString()); logLevel = GetLogLevel(); if (logLevel == "1") { _objLog4Net.Debug(string.Concat("Existing ", filterContext.Controller.GetType().ToString(), "'s ", filterContext.ActionDescriptor.ActionName, " method")); } } private string GetLogLevel() { return ConfigurationManager.AppSettings["LOGLEVEL"].ToLower().ToString(); } } </code></pre> <p>This class will check for loglevel in configuration file if found 1 Through OnActionExecuting() and OnActionExecuted() Will log for Method Start and Method End.</p> <p>Further following is the ExceptionFilter class for logging exception</p> <pre><code>public class ExceptionFilterAttribute : HandleErrorAttribute { private ILog _objLog4Net = null; string logLevel = string.Empty; public override void OnException(ExceptionContext filterContext) { _objLog4Net = LogManager.GetLogger(filterContext.RouteData.Values["controller"].ToString()); logLevel = GetLogLevel(); if (logLevel == "1" || logLevel == "2") { _objLog4Net.Error(filterContext.Exception.Message, filterContext.Exception); } if (logLevel == "3") { if (filterContext.Exception.GetType().IsSubclassOf(typeof(ApplicationException))) { _objLog4Net.Error(filterContext.Exception.Message, filterContext.Exception); } } } private string GetLogLevel() { return ConfigurationManager.AppSettings["LOGLEVEL1"].ToLower().ToString(); } } </code></pre> <p>This class as per log level, Logs All Exceptions or only Application exceptions.</p> <p>If Loglevel is none no conditions get true / nothing is logged.</p>
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