Logging errors in ASP.NET MVC

Question

I\'m currently using log4net in my ASP.NET MVC application to log exceptions. The way I\'m doing this is by having all my controllers inherit from a BaseController class.

Answer 1

MVC3
Create Attribute that inherits from HandleErrorInfoAttribute and includes your choice of logging

public class ErrorLoggerAttribute : HandleErrorAttribute 
{
    public override void OnException(ExceptionContext filterContext)
    {
        LogError(filterContext);
        base.OnException(filterContext);
    }

    public void LogError(ExceptionContext filterContext)
    {
       // You could use any logging approach here

        StringBuilder builder = new StringBuilder();
        builder
            .AppendLine("----------")
            .AppendLine(DateTime.Now.ToString())
            .AppendFormat("Source:\t{0}", filterContext.Exception.Source)
            .AppendLine()
            .AppendFormat("Target:\t{0}", filterContext.Exception.TargetSite)
            .AppendLine()
            .AppendFormat("Type:\t{0}", filterContext.Exception.GetType().Name)
            .AppendLine()
            .AppendFormat("Message:\t{0}", filterContext.Exception.Message)
            .AppendLine()
            .AppendFormat("Stack:\t{0}", filterContext.Exception.StackTrace)
            .AppendLine();

        string filePath = filterContext.HttpContext.Server.MapPath("~/App_Data/Error.log");

        using(StreamWriter writer = File.AppendText(filePath))
        {
            writer.Write(builder.ToString());
            writer.Flush();
        }
    }

Place attribute in Global.asax RegisterGlobalFilters

    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
       // filters.Add(new HandleErrorAttribute());
        filters.Add(new ErrorLoggerAttribute());
    }