Log4Net, ThreadContext and Global.asax

Question

I am working on a Log4Net configuration that will log all unhandled exceptions. I need certain user-based properties to be added to each log entry. I successfully set this in my Application_Error application as follows. Here is my complete global.asax

Imports log4net
Imports log4net.Config

    Public Class Global_asax
        Inherits System.Web.HttpApplication

        'Define a static logger variable
        Private Shared log As ILog = LogManager.GetLogger(GetType(Global_asax))

        Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
            ' Fires when the application is started
            ConfigureLogging()
        End Sub

        Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)
            ' Code that runs when an unhandled error occurs
            Dim ex As Exception = Server.GetLastError()
            ThreadContext.Properties("user") = User.Identity.Name
            ThreadContext.Properties("appbrowser") = String.Concat(Request.Browser.Browser, " ", Request.Browser.Version)
            If TypeOf ex Is HttpUnhandledException AndAlso ex.InnerException IsNot Nothing Then
                ex = ex.InnerException
            End If
            log.Error(ex)
            ThreadContext.Properties.Clear()
        End Sub

        Private Sub ConfigureLogging()
            Dim logFile As String = Server.MapPath("~/Log4Net.config")
            log4net.Config.XmlConfigurator.ConfigureAndWatch(New System.IO.FileInfo(logFile))
            log4net.GlobalContext.Properties("appname") = System.Reflection.Assembly.GetExecutingAssembly.GetName.Name
        End Sub
    End Class

This is working fine. However, I have some questions that I cannot answer.

Is there a way to add custom properties through a text stream, right? Will it always log the correct information, even when downloading? When will you use threadlogicalcontext? Is there a better way to do this?

thanks

Answer 1

, , ThreadContext. , ASP.NET . .

LogicalThreadContext, Call Context, Remoting.

AFAIK HttpContext, " " , .ToString() , .

public class HttpContextUserProvider
{
   public override string ToString()
   {
      return HttpContext.Current.User.Identity.Name;
   }
}

, .

Answer 2

.

, , , . log4net ASP.Net Marek Stój - log4net ASP.NET .

Marek Stój, ThreadContext.Properties["UserName"] ThreadContext.Properties["User"] .

BeginRequest Logger, Application_AuthenticateRequest, log4net.

protected void Application_AuthenticateRequest(object sender, EventArgs e)
{
    Logger.BeginRequest(Request);
}

:

public static void BeginRequest(System.Web.HttpRequest request)
{
    if (request == null) return;

    ThreadContext.Properties["ip_address"] = AdaptivePropertyProvider.Create("ip_address", IPNetworking.GetMachineNameAndIP4Address());
    ThreadContext.Properties["rawUrl"] = AdaptivePropertyProvider.Create("rawUrl", request.RawUrl);

    if (request.Browser != null && request.Browser.Capabilities != null)
        ThreadContext.Properties["browser"] = AdaptivePropertyProvider.Create("browser", request.Browser.Capabilities[""].ToString());

    if (request.IsAuthenticated && HttpContext.Current.User != null)
        ThreadContext.Properties["User"] = AdaptivePropertyProvider.Create("user", HttpContext.Current.User.Identity.Name);
}

, Request HttpContext.Current.Request . . , IPNetworking , IP- . AdaptivePropertyProvider Marek Stój.