iis html文件打开404,c# – 使用HttpModule处理html文件以捕获IIS7上的404错误

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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace xland
{
    public class AspExceptionHandler : IHttpModule, IHttpHandler
    {
        public void Dispose() { }
        public void Init(HttpApplication context)
        {
            context.Error += new EventHandler(ErrorHandler);
        }
        private void ErrorHandler(object sender, EventArgs e)
        {
            HttpApplication application = (HttpApplication)sender;
            try
            {
                // Gather information
                Exception currentException = application.Server.GetLastError(); ;
                String errorPage = "http://www.begon.cn/error.aspx";
                HttpException httpException = currentException as HttpException;
                if (httpException == null || httpException.GetHttpCode() != 404)
                {
                    application.Server.Transfer(errorPage, true);
                }
                //The error is a 404
                else
                {
                    // Continue
                    application.Server.ClearError();
                    //Try and redirect to the proper page.
                    String requestedFile = application.Request.Url.AbsolutePath.Trim('/').Split('/').Last();
                    // Redirect if required
                    string redirectURL = requestedFile.Trim('/');
                    if (!string.IsNullOrEmpty(redirectURL))
                    {
                        //Redirect to the proper URL
                    }
                    //If we can't redirect properly, we set the statusCode to 404.
                    else
                    {
                        //Report the 404

                    }
                }
            }
            catch (Exception ex)
            {

            }

        }
        public bool IsReusable
        {
            get { return true; }
        }

        public void ProcessRequest(HttpContext context)
        {
            if (!File.Exists(context.Request.PhysicalPath))
            {
                throw new HttpException(404, String.Format("The file {0} does not exist", context.Request.PhysicalPath));
            }
            else
            {
                context.Response.TransmitFile(context.Request.PhysicalPath);

            }
        }
    }
}

在ProcessRequest方法(IHttpHandler所需)中,我检查文件是否存在.

如果它不存在,我抛出一个由我的类的HttpModule部分捕获的HttpException.

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