asp.net mvc：如何将非www重定向到www，反之亦然

您可能会考虑另一种方法：

protected void Application_BeginRequest (object sender, EventArgs e){   if (!Request.Url.Host.StartsWith ("www") && !Request.Url.IsLoopback)   {      UriBuilder builder = new UriBuilder (Request.Url);      builder.Host = "www." + Request.Url.Host;      Response.Redirect (builder.ToString (), true);   }}

但是，这将执行302重定向，因此建议进行一些调整：

protected void Application_BeginRequest (object sender, EventArgs e){   if (!Request.Url.Host.StartsWith ("www") && !Request.Url.IsLoopback)   {      UriBuilder builder = new UriBuilder (Request.Url);      builder.Host = "www." + Request.Url.Host;      Response.StatusCode = 301;      Response.AddHeader ("Location", builder.ToString ());      Response.End ();   }}

这将返回“ 301已永久移动”。