In-depth analysis of mvc4 custom 404 page in asp.net (share)
In the previous article "An article explaining the usage of ES6 proxy Proxy in JS (code sharing)", we learned about the usage of ES6 proxy Proxy in JS. The following article will help you understand the mvc4 custom 404 page in asp.net. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
#Of course there are many ways to define 404. Different methods present different forms, and the user experience is also different. There are two
methods provided below. One
1. Find the section <system.web> in web.config and click to enable404Configuration
<customErrors defaultRedirect="~/Error" mode="On" redirectMode="ResponseRedirect"> <error redirect="/Error" statusCode="404" /> </customErrors>
2. Define a controllersError (this is up to you), and define <pre class='brush:php;toolbar:false;'>public ActionResult Index()
{
Response.Status = "404 Not Found";
Response.StatusCode = 404;
return View();
}</pre>this in
as follows This method defaults to adding ?aspxerrorpath=/ to your url. For example: http://localhost/Error??aspxerrorpath=/123456, so it is not recommended. Try
Method 2:
OpenGlobal.asaxFile definition error redirection address(controller/action)
protected void Application_Error(object sender, EventArgs e)
{
Exception ex = Server.GetLastError();
if (ex is HttpException && ((HttpException)ex).GetHttpCode() == 404)
{
Response.Redirect("/Error");
}
}Note: During development, we often use the
Response.Redirectmethod in theApplication_Errormethod inGlobal.asaxto jump to a custom error page, but sometimes (especially when the site is deployed to IIS) theResponse.Redirectmethod used in theApplication_Errormethod will fail. When an abnormal error occurs, the default error yellow pages will still be displayed.
The fundamental reason is that although we used the
Response.Redirectmethod in theApplication_Errormethod, when an exception error occurs in the systemAsp.Netbelieves that the exception has not been handled, so it will not jump to the page pointed to byResponse.Redirectin theApplication_Errormethod, and will eventually jump to the default error Yellow Pages.
The solution to this problem is very simple to use
Response.Redirectin theApplication_Errormethod before callingThe Server.ClearError()method tells the system that the abnormal error that occurred has been handled, so that if theResponse.Redirectmethod is called again, the system will jump to the custom error page.
Recommended learning: asp.net video tutorial
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