实现自定义文件类型处理

   如处理文件的类型为.dspx， 先编写一个实现IHttpHandler接口的类：MyHttpHandler，然后坐在webconfig中添加对.dspx文件的HttpHandler，在<httpHandlers>中添加一个节点，如下所示：

   <add path="*.dspx" verb="*" type="MyHttpHandler"/>

 

using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.IO;using System.Text;

/// <summary>/// MyHttpHandler是自定义的实现了IHttpHandler接口的类/// </summary>public class MyHttpHandler:IHttpHandler{ public MyHttpHandler() {  //  // TODO: 在此处添加构造函数逻辑  // }

    #region IHttpHandler 成员    /// <summary>    /// 指示其它请求是否可以使用这个实例，如果是true，则放入池中接受其它请求以提高请求    /// </summary>    public bool IsReusable    {        get { return true; }    }    /// <summary>    /// 处理请求    /// </summary>    /// <param name="context"></param>    public void ProcessRequest(HttpContext context)    {        HttpRequest request = context.Request;        HttpResponse response = context.Response;        string requestFile = request.PhysicalPath;        response.Write("<font size='3'>");        response.Write("物理路径：" + requestFile+"<br/>");        if (File.Exists(requestFile))        {            response.Write("以下是文件内容：<br/>");            FileInfo fileInfo=new FileInfo(requestFile);            StreamReader reader = new StreamReader(requestFile,Encoding.Default);            string line=string.Empty;            while (!string.IsNullOrEmpty(line = reader.ReadLine()))            {                response.Write(line + "<br/>");            }            reader.Close();        }        else        {            response.Write("不好意思哦，找不到你请求的文件。");        }        response.Write("</font>");            }

    #endregion}