MVC6中的自定义选择性404页面 [英] Custom Selective 404 Page in MVC6

问题描述

我正在寻求帮助，我们可以在ASP.NET 5 MVC6中创建一个自定义的Error404页面.

I am looking for help we can have a custom Error404 page in ASP.NET 5 MVC6.

我最接近的是使用

app.UseStatusCodePagesWithReExecute("/Error/{0}");

在Startup.cs配置方法中.

in the Startup.cs Configure method.

通过调用"/Error/404"操作可以正常工作.

It works fine by calling the "/Error/404" action.

我正在寻找有关在缺少JPG/PNG/GIF请求的情况下如何发送不同的404响应的方法.

I am looking on ways on how I can send a different 404 response in the event it is a missing JPG/PNG/GIF request.

任何朝着正确方向提出的建议都会有很大帮助.

Any suggestion in the right direction would be of great help.

推荐答案

作为自定义中间件方法的替代方法，您可以使用MapWhen拆分管道并分别处理图像:

As an alternative to the custom middleware approach, you can use MapWhen to split the pipeline and handle images separately:

将以下内容添加到Startup.cs的Configure方法中(非图像中间件上方):

Add the following to the Configure method of Startup.cs (above your non-image middleware):

app.MapWhen(context => context.Request.Path.Value.EndsWith(".png"), appBuilder =>
{
    appBuilder.UseStatusCodePagesWithReExecute("/image-error");
    appBuilder.UseStaticFiles();
});

很明显，您可以更改谓词来满足您的需求.

Obviously, you can change the predicate to match your needs.

然后，您可以创建一个操作并查看该错误以处理该错误:

Then you can create an action and view to handle the error:

[Route("image-error")]
public IActionResult ImageError(int code)
{
    return View();
}

您可以在我写的有关 查看全文