GSpring

using System; using System.Web;    // 引用System.Web组件   namespace ClassLibrary1 {     public class MyHandler : IHttpHandler     {         public MyHandler()         {         }           #region IHttpHandler 成员         public void ProcessRequest(HttpContext context)         {             // 跳转到WebForm1.aspx，由WebForm1.aspx输出rar文件             HttpResponse response = context.Response;     response.Redirect("http://193.100.100.56/TestWebSolution/WebApplication1/WebForm1.aspx");         }           public bool IsReusable         {             get             {                 // TODO:  添加 MyHandler.IsReusable getter 实现                 return true;             }         }         #endregion     } }

FileInfo file = new System.IO.FileInfo(@"G:\WebCenter\TestWebSolution\WebApplication1\test.rar"); // FileInfo 类在 System.IO 命名空间里               Response.Clear();               Response.AddHeader("Content-Disposition", "filename=" + file.Name);               Response.AddHeader("Content-Length", file.Length.ToString());               string fileExtension = file.Extension;                 // 根据文件后缀指定文件的Mime类型               switch (fileExtension)               {                    case ".mp3":                        Response.ContentType = "audio/mpeg3";                        break;                    case "mpeg":                        Response.ContentType = "video/mpeg";                        break;                    case "jpg":                        Response.ContentType = "image/jpeg";                        break;                    case "........等等":                        Response.ContentType = "....";                        break;                    default:                        Response.ContentType = "application/octet-stream";                        break;               }                 Response.WriteFile(file.FullName);               Response.End();