如何处理MVC5中的配置和代码中的404错误？

Question

我已经实现了下面链接中提到的异常处理

如何将错误消息传递给MVC 5中的错误视图？

它工作正常.但我有要求处理404 Error.

我怎样才能做到这一点？

如果我使用下面的代码,

<customErrors mode="On">
  <error statusCode="404" redirect="/Home/Error"></error>
</customErrors>

404发生任何错误时都能正常工作.但是如果发生任何其他异常,那么我的error.cshtml调用两次并显示相同的异常two times.

Answer 1

web.config中

关闭system.web中的自定义错误

<system.web>
    <customErrors mode="Off" />
</system.web>

在system.webServer中配置http错误

<system.webServer>
    <httpErrors errorMode="Custom" existingResponse="Auto">
      <clear />
      <error statusCode="404" responseMode="ExecuteURL" path="/NotFound" />
      <error statusCode="500" responseMode="ExecuteURL" path="/Error" />
    </httpErrors>
</system.webServer>

创建简单的错误控制器来处理这些请求ErrorContoller.cs

[AllowAnonymous]
public class ErrorController : Controller {
    // GET: Error
    public ActionResult NotFound() {
        var statusCode = (int)System.Net.HttpStatusCode.NotFound;
        Response.StatusCode = statusCode;
        Response.TrySkipIisCustomErrors = true;
        HttpContext.Response.StatusCode = statusCode;
        HttpContext.Response.TrySkipIisCustomErrors = true;
        return View();
    }

    public ActionResult Error() {
        Response.StatusCode = (int)System.Net.HttpStatusCode.InternalServerError;
        Response.TrySkipIisCustomErrors = true;
        return View();
    }
}

配置路由RouteConfig.cs

public static void RegisterRoutes(RouteCollection routes) {

    //...other routes 

    routes.MapRoute(
        name: "404-NotFound",
        url: "NotFound",
        defaults: new { controller = "Error", action = "NotFound" }
    );

    routes.MapRoute(
        name: "500-Error",
        url: "Error",
        defaults: new { controller = "Error", action = "Error" }
    );

    //..other routes

    //I also put a catch all mapping as last route

    //Catch All InValid (NotFound) Routes
    routes.MapRoute(
        name: "NotFound",
        url: "{*url}",
        defaults: new { controller = "Error", action = "NotFound" }
    );
}

最后确保您拥有控制器操作的视图

Views/Shared/NotFound.cshtml
Views/Shared/Error.cshtml

如果您要处理任何其他错误,可以按照该模式添加并根据需要添加.这将避免重定向并保持引发的原始http错误状态.