Question

我已经实现了以下链接

中提到的异常处理

How to pass error message to error view in MVC 5?

工作正常。但我要求处理404 Error。

我该怎么做？

如果我使用下面的代码，

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

在发生任何404错误时效果很好。但是，如果发生任何其他异常，我的error.cshtml会拨打两次并显示相同的异常two times。

Answer 1

<强>的web.config

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();
    }
}

配置路线 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

如果您想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。这样可以避免重定向并保持引发的原始http错误状态。

Answer 2

如果您要为customErrors定义defaultRedirect属性，那么在您的情况下，error.cshtml将只呈现一次：

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

如何处理MVC5中的配置和代码中的404错误？

2 个答案: