Reponse.WriteFile输出文档格式不正确问题，如换行

今天正好看到这个方法，工作中也比较少用到，就想整理下用法收录到笔记中，其中在做文本输出到页面的时候，发现了个问题，就是：

如果输出的是txt文档，虽然在notepad中是有回车等格式的，但是到了网页中，回车什么的格式都不存在了，网上查了些文档，虽然有相同的问题，但那些答案真是很无语，不扯远了，入正题：

乱码的问题好解决，txt文档指明下输出编码格式即可，utf-8不行，就用gb2312，如：

Response.Charset = "gb2312";

格式的问题，其实可以通过ContentType来解决，如txt文档对应的类型为text/plain：

Response.ContentType = "text/plain"; 

但这里会有问题，因为更改了显示类型，那么原网页中的html标签都会像encode了一样原封不动的显示出来；查阅资料的时候有人说用Response.Clear可以解决，我是没做出效果，而且看说明也只是清除缓存区中的内容，如何能影响页面标签？这个问题解决方法也很简单：

Reponse.End();

停止页面标签的生成即可，因为我只是想在页面中输出文档中的内容，没有其他业务，所以这么操作，具体的还得根据业务需求来定，这里只是提出一种解决方案，完整代码：

            Response.Charset = "gb2312";
            Response.ContentType = "text/plain";            
            Response.WriteFile("f:\\123.txt");
            Response.End();

这里给出contentType的可选值：

'ez' =>'application/andrew-inset',

'hqx' =>'application/mac-binhex40',

'cpt' =>'application/mac-compactpro',

'doc' =>'application/msword',

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

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

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

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

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

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

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

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

'oda' =>'application/oda',

'pdf' =>'application/pdf',

'ai' =>'application/postscript',

'eps' =>'application/postscript',

'ps' =>'application/postscript',

'smi' =>'application/smil',

'smil' =>'application/smil',

'mif' =>'application/vnd.mif',

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

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

'wbxml' =>'application/vnd.wap.wbxml',

'wmlc' =>'application/vnd.wap.wmlc',

'wmlsc' =>'application/vnd.wap.wmlscriptc',

'bcpio' =>'application/x-bcpio',

'vcd' =>'application/x-cdlink',

'pgn' =>'application/x-chess-pgn',

'cpio' =>'application/x-cpio',

'csh' =>'application/x-csh',

'dcr' =>'application/x-director',

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

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

'dvi' =>'application/x-dvi',

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

'gtar' =>'application/x-gtar',

'hdf' =>'application/x-hdf',

'js' =>'application/x-javascript',

'skp' =>'application/x-koan',

'skd' =>'application/x-koan',

'skt' =>'application/x-koan',

'skm' =>'application/x-koan',

'latex' =>'application/x-latex',

'nc' =>'application/x-netcdf',

'cdf' =>'application/x-netcdf',

'sh' =>'application/x-sh',

'shar' =>'application/x-shar',

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

'sit' =>'application/x-stuffit',

'sv4cpio' =>'application/x-sv4cpio',

'sv4crc' =>'application/x-sv4crc',

'tar' =>'application/x-tar',

'tcl' =>'application/x-tcl',

'tex' =>'application/x-tex',

'texinfo' =>'application/x-texinfo',

'texi' =>'application/x-texinfo',

't' =>'application/x-troff',

'tr' =>'application/x-troff',

'roff' =>'application/x-troff',

'man' =>'application/x-troff-man',

'me' =>'application/x-troff-me',

'ms' =>'application/x-troff-ms',

'ustar' =>'application/x-ustar',

'src' =>'application/x-wais-source',

'xhtml' =>'application/xhtml+xml',

'xht' =>'application/xhtml+xml',

'zip' =>'application/zip',

'au' =>'audio/basic',

'snd' =>'audio/basic',

'mid' =>'audio/midi',

'midi' =>'audio/midi',

'kar' =>'audio/midi',

'mpga' =>'audio/mpeg',

'mp2' =>'audio/mpeg',

'mp3' =>'audio/mpeg',

'aif' =>'audio/x-aiff',

'aiff' =>'audio/x-aiff',

'aifc' =>'audio/x-aiff',

'm3u' =>'audio/x-mpegurl',

'ram' =>'audio/x-pn-realaudio',

'rm' =>'audio/x-pn-realaudio',

'rpm' =>'audio/x-pn-realaudio-plugin',

'ra' =>'audio/x-realaudio',

'wav' =>'audio/x-wav',

'pdb' =>'chemical/x-pdb',

'xyz' =>'chemical/x-xyz',

'bmp' =>'image/bmp',

'gif' =>'image/gif',

'ief' =>'image/ief',

'jpeg' =>'image/jpeg',

'jpg' =>'image/jpeg',

'jpe' =>'image/jpeg',

'png' =>'image/png',

'tiff' =>'image/tiff',

'tif' =>'image/tiff',

'djvu' =>'image/vnd.djvu',

'djv' =>'image/vnd.djvu',

'wbmp' =>'image/vnd.wap.wbmp',

'ras' =>'image/x-cmu-raster',

'pnm' =>'image/x-portable-anymap',

'pbm' =>'image/x-portable-bitmap',

'pgm' =>'image/x-portable-graymap',

'ppm' =>'image/x-portable-pixmap',

'rgb' =>'image/x-rgb',

'xbm' =>'image/x-xbitmap',

'xpm' =>'image/x-xpixmap',

'xwd' =>'image/x-xwindowdump',

'ico' =>'image/x-ico',

'igs' =>'model/iges',

'iges' =>'model/iges',

'msh' =>'model/mesh',

'mesh' =>'model/mesh',

'silo' =>'model/mesh',

'wrl' =>'model/vrml',

'vrml' =>'model/vrml',

'css' =>'text/css',

'html' =>'text/html',

'htm' =>'text/html',

'asc' =>'text/plain',

'txt' =>'text/plain',

'rtx' =>'text/richtext',

'rtf' =>'text/rtf',‘application/rtf’

'sgml' =>'text/sgml',

'sgm' =>'text/sgml',

'tsv' =>'text/tab-separated-values',

'wml' =>'text/vnd.wap.wml',

'wmls' =>'text/vnd.wap.wmlscript',

'etx' =>'text/x-setext',

'xsl' =>'text/xml',

'xml' =>'text/xml',

'mpeg' =>'video/mpeg',

'mpg' =>'video/mpeg',

'mpe' =>'video/mpeg',

'qt' =>'video/quicktime',

'mov' =>'video/quicktime',

'mxu' =>'video/vnd.mpegurl',

'avi' =>'video/x-msvideo',

'movie' =>'video/x-sgi-movie',

'ice' =>'x-conference/x-cooltalk'