Microsoft.Owin.Diagnostics.ErrorPageExtensions.UserErrorPage将捕获哪些异常

Question

我从http://blogs.msdn.com/b/webdev/archive/2013/11/22/debugging-owin-app-or-framework.aspx获得了演示代码，它显示了一个性感的错误页面。

app.UseErrorPage(new ErrorPageOptions()
        {
            //Shows the OWIN environment dictionary keys and values. This detail is enabled by default if you are running your app from VS unless disabled in code. 
            ShowEnvironment = true,
            //Hides cookie details
            ShowCookies = false, 
            //Shows the lines of code throwing this exception. This detail is enabled by default if you are running your app from VS unless disabled in code. 
 ShowSourceCode = true,
            });

            app.Run(async context =>
            {
               throw new Exception("UseErrorPage() demo");
               await context.Response.WriteAsync("Error page demo");
            });
        }

但是，如果我在Controller动作中抛出异常，则不会显示错误页面，我仍然会看到YSOD。

所以我想知道UseErrorPage会捕获哪些异常？我是否需要其他配置才能使其正常工作？

Answer 1

通过Controller操作你的意思是MVC？ MVC不直接在OWIN上运行，因此Asp.Net首先看到异常并向您显示YSOD。 Katana ErrorPage只能显示OWIN管道中发生的异常。