asp.net to achieve 404 page and 301 Redirect Method _ Practical Skills

This article illustrates the method of asp.net to achieve 404 pages and 301 redirects. Share to everyone for your reference. The implementation methods are as follows:

In a way, 301 redirects have nothing to do with 404 pages. Why I want to get together, because it is very simple to achieve, where I will introduce a.

How to set the 404 page method in the ASP.net record.
Below first look at the previous Setup method, Web.config file:

Copy Code code as follows:

<configuration>
<system.web>
<customerrors mode= "RemoteOnly" defaultredirect= "404.aspx" >
</customErrors>
</system.web>
</configuration>

Of course, we've created 404 page 404.aspx before, and I'm sure a lot of people think that's OK, but we've overlooked a point where we just do a simple redirect and don't tell the browser that the access page doesn't exist. A paragraph below is excerpted from Sun Ming Blog:
The 404 error is the seo/seo.html "target=" _blank > Search engine identifies the status of the Web page through an HTTP status code. When the search engine gets a bad link, the site should return a 404 status code, telling the search engine to discard the index on the link. If you return a 200 or 302 status code, the search engine will index the link, which leads to a large number of different links pointing to the same page content. As a result, search engines have significantly reduced their trust in the site. Many sites have this problem: the 404 page Returns a 200 or 302 status code instead of a 404 status code.
So, next I added the following code under the 404.aspx file:

Copy Code code as follows:

protected void Page_Load (object sender, EventArgs e)
{
Response.Status = "404 Not Found";
}

Here, by using the HttpWatch tool, you can find that a 404 status code is correctly returned when you visit a page that does not exist in the Web site.
So how to set 301 pages, let's look at the following

For example: This site is the original domain name is www.jb51.net, now to the domain name access, all redirected to Www.jb51.net; Just add the following code to the page where you need to turn:

Copy Code code as follows:

protected void Page_Load (object sender, EventArgs e)
{
Response.Clear ();
Response.statuscode = 301;
Response.Status = "Moved Permanently";
Response.AddHeader ("Location", "http://www.jb51.net");
}

Using this method, the site will be the original domain name switch to the www.jb51.net, now the domain name should be very easy to remember.

I hope this article will help you with the ASP.net program design.