In my MVC web project. I am trying to show custom error pages to my visitors without using "custromerrors" element in web.config.
I can catch exceptions like below
protected void Application_Error(object sender, EventArgs e)
{
Exception exception = Server.GetLastError();
bool success = RaiseErrorSignal(exception);
Response.Clear();
HttpException httpException = exception as HttpException;
RouteData routeData = new RouteData();
routeData.Values.Add("controller", "Error");
if (httpException == null)
{
routeData.Values.Add("action", "Index");
}
else //It's an Http Exception, Let's handle it.
{
switch (httpException.GetHttpCode())
{
case 404:
// Page not found.
routeData.Values.Add("action", "Error404");
break;
case 500:
// Server error.
routeData.Values.Add("action", "Error500");
break;
// Here you can handle Views to other error codes.
// I choose a General error template
default:
routeData.Values.Add("action", "Index");
break;
}
}
// Pass exception details to the target error View.
routeData.Values.Add("error", exception);
// Clear the error on server.
Server.ClearError();
// Call target Controller and pass the routeData.
IController errorController = new ProjectName.WebSite.Controllers.ErrorController();
errorController.Execute(new RequestContext(
new HttpContextWrapper(Context), routeData));
}
private static bool RaiseErrorSignal(Exception e)
{
var context = HttpContext.Current;
if (context == null)
return false;
var signal = ErrorSignal.FromContext(context);
if (signal == null)
return false;
signal.Raise(e, context);
return true;
}
But Elmah cant log errors also i am raising error signal.
Build the application, run it in the browser, and navigate to http://www.yoursite.com/elmah.axd. You are prompted to log in before you see the content. After a successful authentication, you see a web page to remotely view the entire log of recorded exceptions.
ELMAH provides a simple, yet powerful mechanism for logging errors in an ASP.NET web application. Like Microsoft's health monitoring system, ELMAH can log errors to a database and can send the error details to a developer via email.
ELMAH doesn't support ASP.NET Core.
I found the problem, I missed a web.config section. I added "ErrorLog" module to <system.webserver><modules>
.
I also need to add it to <system.web><httpModules>
.
After adding, Elmah start to log errors.
Also I don't need to call ErrorSignal.Raise() method, Elmah can detect errors without signalling.
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