Custom error page on when application error occurred - asp.net

Question

How to show a custom error page when an application error occurred without changing the url?
When application error occurs, then how to show customer a custom error page without routing to another Url?

Answer 1

Inside your web.config check that the configuration looks like:
<system.web>
...
<customErrors mode="On">
<error statusCode="404" redirect="~/custom404.html"/>
<customErrors
</system.web>

Answer 2

<customErrors mode="On" defaultRedirect="~/custom404.html">
</customErrors>

Answer 3

You can do this in code too. For a MVC project one can ovverride the Controller's function OnException, perform some logging and other stuff then load the contents from an Error.URL in background where the error information is formated.
protected override void OnException(ExceptionContext filterContext)
{
if (filterContext != null && filterContext.Exception != null && !filterContext.ExceptionHandled)
{
ViewBag.Exception = filterContext.Exception;
filterContext.Result = View("~/Views/Shared/Error.cshtml");
filterContext.ExceptionHandled = true;
Log.Error(filterContext.Exception.Message +":" + filterContext.Exception.StackTrace);
}
}
In this snippet all Controllers in the project inherit from a BaseController where the function OnException is being overridden.

Answer 4

Try this in your Web.config file
<customErrors mode="On" redirectMode="ResponseRewrite" defaultRedirect="/errors/error">
</customErrors>
In any error it will redirect to the /errors/error page. Please note the redirectMode attribute. With the value ResponseRewrite the url will not change.
Now, if you want to show a different page for a specific error, you can set it with the following.
<customErrors mode="On" redirectMode="ResponseRewrite" defaultRedirect="/errors/error">
<error statusCode="404" redirect="/errors/error404" />
<error statusCode="500" redirect="/errors/error500" />
</customErrors>