ASP.NET MVC错误处理的对应解决方法

<system.web>
 <customErrors mode="On" defaultRedirect="/error/error2">
  <error statusCode="404" redirect="/error/error1" />
 </customErrors>
 <!--其他配置-->
</system.web>

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)]
public class HandleErrorAttribute : FilterAttribute, IExceptionFilter
{
    //获取或设置异常的类型。
    public Type ExceptionType { get; set; } 
    //获取或设置用于显示异常信息的母版视图
    public string Master { get; set; }
    //获取此特性的唯一标识符。
    public override object TypeId { get; }
    //获取或设置用于显示异常信息的页视图。
    public string View { get; set; }
    //在发生异常时调用。 
    //filterContext:操作筛选器上下文
    public virtual void OnException(ExceptionContext filterContext);
}

[HandleError(ExceptionType=typeof(KeyNotFoundException),View="KeyNotFound")]
public ActionResult Index()
{
  ......
}

public class CustomHandleError : HandleErrorAttribute
  {
    public override void OnException(ExceptionContext filterContext)
    {
      if (filterContext==null)
        base.OnException(filterContext);

      //记录日志
      LogError(filterContext.Exception);

      //判断是否启用了自定义错误
      if (filterContext.HttpContext.IsCustomErrorEnabled)
      {
        //将错误设置为已处理
        filterContext.ExceptionHandled = true;
        base.OnException(filterContext);
      }
    }
  }

public class FilterConfig
{
    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
      filters.Add(new HandleErrorAttribute 
      {
        ExceptionType = typeof(KeyNotFoundException),
        View = "KeyNotFound",
        Order = 2
      });
      filters.Add(new HandleErrorAttribute(),1);
    }
}

public class FilterConfig
  {
    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
      
       //其他过滤器

       filters.Add(new CustomHandleError());
     }
   }

public class HomeController : Controller
 {

    //其他控制器操作

    protected override void OnException(ExceptionContext filterContext)
    {
      if (filterContext==null)
        base.OnException(filterContext);

      //记录日志
      LogError(filterContext.Exception);

      //判断是否启用了自定义错误
      if (filterContext.HttpContext.IsCustomErrorEnabled)
      {
        //将错误设置为已处理
        filterContext.ExceptionHandled = true;
        //显示错误页
      this.View("Error").ExecuteResult(this.ControllerContext);
      }
    }
}

public class BaseController : Controller
  {
    protected override void OnException(ExceptionContext filterContext)
    {
      //错误日志记录
    }
  }

 public class MvcApplication : System.Web.HttpApplication
  {
    protected void Application_Start()
    {
      AreaRegistration.RegisterAllAreas();
      FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
      RouteConfig.RegisterRoutes(RouteTable.Routes);
      BundleConfig.RegisterBundles(BundleTable.Bundles);
    }

    protected void Application_Error(object sender, EventArgs e)
    {
      var exception = Server.GetLastError();
      if (exception == null)
      {
        return;
      }

      //异常发生记录日志或发送邮件

      //清除异常
      Server.ClearError();

      //重定向
      Response.Redirect("home/index");
    }
  }

public class RouteConfig
  {
    public static void RegisterRoutes(RouteCollection routes)
    {
      //其他配置
      routes.MapRoute(
        name: "MatchAll",
        url: "{*anyurl}",
        defaults: new { controller = "Error",action ="Missing" }
        );
     }
   }

public class ErrorController : Controller
  {
    // GET: Error
    public ActionResult Missing()
    {
      HttpContext.Response.StatusCode = 404;
      //禁用IIS7默认的错误页，这样才能展示我们指定都的视图
      HttpContext.Response.TrySkipIisCustomErrors = true;

      //也可以在此处记录日志信息

      //要展示的信息
      var model = ......
      return View(model);
    }
   }

public class HomeController : Controller
  {
    [HandleError(ExceptionType = typeof(KeyNotFoundException), View = "Error")]
    public ActionResult Index()
    {
      throw new KeyNotFoundException();
      return View();
    }

    //其他控制操作

   }