ASP.NET 文件下载功能源码

try

        {

            string FULLFILENAME = Server.MapPath();

            FileInfo downLoadFile = new FileInfo(FULLFILENAME);

            if(downLoadFile.Exists)

            {

                Response.Clear();

                Response.ClearHeaders();

                Response.Buffer=false;

                Response.ContentType="application/octet-stream";

                Response.AppendHeader("Content-Disposition","attachment;filename="+HttpUtility.UrlEncode(DownloadFile.FullName,System.Text.Encoding.ASCII));

                Response.AppendHeader("Content-Length",DownloadFile.Length.ToString());

                Response.WriteFile(DownloadFile.FullName);

                Response.Flush();

                Response.End();

            }

            else{

                //文件不存在

            }

        }

        catch

        {

          //文件不存在

        } 

 

 

下面是常用的的ContentType

　　'doc' => 'application/msword',

　　'bin' => 'application/octet-stream',

　　'exe' => 'application/octet-stream',

　　'class' => 'application/octet-stream',

　　'dll' => 'application/octet-stream',

　　'xls' => 'application/vnd.ms-excel',

　　'ppt' => 'application/vnd.ms-powerpoint',

　　'vcd' => 'application/x-cdlink',

　　'dir' => 'application/x-director',
　　'dxr' => 'application/x-director',
　　'dvi' => 'application/x-dvi',

　　'spl' => 'application/x-futuresplash',

　　'js' => 'application/x-javascript',

　　'swf' => 'application/x-shockwave-flash', 

　　'src' => 'application/x-wais-source',
　　'xhtml' => 'application/xhtml+xml',
　　'mp2' => 'audio/mpeg',

　　'mp3' => 'audio/mpeg',

　　'wav' => 'audio/x-wav',

　　"wmv" => 'video/x-ms-wmv',

　　"wma" => 'audio/x-ms-wma',

　　'pdb' => 'chemical/x-pdb',

　　'bmp' => 'image/bmp',

　　'gif' => 'image/gif',

　　'jpeg' => 'image/jpeg',

　　'jpg' => 'image/jpeg',

　　'jpe' => 'image/jpeg',

　　'png' => 'image/png',

　　'css' => 'text/css',

　　'html' => 'text/html',

　　'htm' => 'text/html',

　　'asc' => 'text/plain',

　　'txt' => 'text/plain',

　　'rtx' => 'text/richtext',

　　'rtf' => 'text/rtf',

　　'xsl' => 'text/xml',

　　'xml' => 'text/xml',

　　'mpeg' => 'video/mpeg',

　　'mpg' => 'video/mpeg',

　　'avi' => 'video/x-msvideo',

　　'movie' => 'video/x-sgi-movie',