.NET获取文件的MIME类型(Content Type)
// 需要先行引入System.Web // 之后可以直接使用MimeMapping类的静态方法获取文件的MIME类型 string file = @"1.txt"; string contentType = MimeMapping.GetMimeMapping(file); Console.WriteLine("{0}'s MIME TYPE:{1}", file, contentType);
第一种：这种获取MIME类型（Content Type）的方法需要在.NET 4.5之后才能够支持，但是非常简单。
优点：方便快捷
缺点：只能在.NET 4.5之后使用
如果没有的MIME TYPE将会返回：
// 自定义一个方法 // 通过系统中的Content Type来获取MIME TYPE public static string GetMimeType(string fileName) { string mimeType = "application/unknown"; string ext = Path.GetExtension(fileName).ToLower(); RegistryKey regKey = Registry.ClassesRoot.OpenSubKey(ext); if (regKey != null && regKey.GetValue("Content Type") != null) { mimeType = regKey.GetValue("Content Type").ToString(); } return mimeType; }
优点：
1. 直接快速
2. 没有.NET的版本限制；
缺点：
1. 需要有访问注册表的权限；
2. 获取的Content Type范围受系统环境约束。
这个方法在没有找到对应的MIME Type时，返回的是application/unknow，当然，你也可以自己定义其他任何返回值。
// 通过自己定义一个静态类 // 将所有的Content Type都扔进去吧 // 调用的时候直接调用静态方法即可。 public static class MimeMapping { private static Hashtable _mimeMappingTable; private static void AddMimeMapping(string extension, string MimeType) { MimeMapping._mimeMappingTable.Add(extension, MimeType); } public static string GetMimeMapping(string FileName) { string text = null; int num = FileName.LastIndexOf('.'); if (0 < num && num > FileName.LastIndexOf('\\')) { text = (string)MimeMapping._mimeMappingTable[FileName.Substring(num)]; } if (text == null) { text = (string)MimeMapping._mimeMappingTable[".*"]; } return text; } static MimeMapping() { MimeMapping._mimeMappingTable = new Hashtable(190, StringComparer.CurrentCultureIgnoreCase); MimeMapping.AddMimeMapping(".323", "text/h323"); MimeMapping.AddMimeMapping(".asx", "video/x-ms-asf"); MimeMapping.AddMimeMapping(".acx", "application/internet-property-stream"); MimeMapping.AddMimeMapping(".ai", "application/postscript"); MimeMapping.AddMimeMapping(".aif", "audio/x-aiff"); MimeMapping.AddMimeMapping(".aiff", "audio/aiff"); MimeMapping.AddMimeMapping(".axs", "application/olescript"); MimeMapping.AddMimeMapping(".aifc", "audio/aiff"); MimeMapping.AddMimeMapping(".asr", "video/x-ms-asf"); MimeMapping.AddMimeMapping(".avi", "video/x-msvideo"); MimeMapping.AddMimeMapping(".asf", "video/x-ms-asf"); MimeMapping.AddMimeMapping(".au", "audio/basic"); MimeMapping.AddMimeMapping(".application", "application/x-ms-application"); MimeMapping.AddMimeMapping(".bin", "application/octet-stream"); MimeMapping.AddMimeMapping(".bas", "text/plain"); MimeMapping.AddMimeMapping(".bcpio", "application/x-bcpio"); MimeMapping.AddMimeMapping(".bmp", "image/bmp"); MimeMapping.AddMimeMapping(".cdf", "application/x-cdf"); MimeMapping.AddMimeMapping(".cat", "application/vndms-pkiseccat"); MimeMapping.AddMimeMapping(".crt", "application/x-x509-ca-cert"); MimeMapping.AddMimeMapping(".c", "text/plain"); MimeMapping.AddMimeMapping(".css", "text/css"); MimeMapping.AddMimeMapping(".cer", "application/x-x509-ca-cert"); MimeMapping.AddMimeMapping(".crl", "application/pkix-crl"); MimeMapping.AddMimeMapping(".cmx", "image/x-cmx"); MimeMapping.AddMimeMapping(".csh", "application/x-csh"); MimeMapping.AddMimeMapping(".cod", "image/cis-cod"); MimeMapping.AddMimeMapping(".cpio", "application/x-cpio"); MimeMapping.AddMimeMapping(".clp", "application/x-msclip"); MimeMapping.AddMimeMapping(".crd", "application/x-mscardfile"); MimeMapping.AddMimeMapping(".deploy", "application/octet-stream"); MimeMapping.AddMimeMapping(".dll", "application/x-msdownload"); MimeMapping.AddMimeMapping(".dot", "application/msword"); MimeMapping.AddMimeMapping(".doc", "application/msword"); MimeMapping.AddMimeMapping(".dvi", "application/x-dvi"); MimeMapping.AddMimeMapping(".dir", "application/x-director"); MimeMapping.AddMimeMapping(".dxr", "application/x-director"); MimeMapping.AddMimeMapping(".der", "application/x-x509-ca-cert"); MimeMapping.AddMimeMapping(".dib", "image/bmp"); MimeMapping.AddMimeMapping(".dcr", "application/x-director"); MimeMapping.AddMimeMapping(".disco", "text/xml"); MimeMapping.AddMimeMapping(".exe", "application/octet-stream"); MimeMapping.AddMimeMapping(".etx", "text/x-setext"); MimeMapping.AddMimeMapping(".evy", "application/envoy"); MimeMapping.AddMimeMapping(".eml", "message/rfc822"); MimeMapping.AddMimeMapping(".eps", "application/postscript"); MimeMapping.AddMimeMapping(".flr", "x-world/x-vrml"); MimeMapping.AddMimeMapping(".fif", "application/fractals"); MimeMapping.AddMimeMapping(".gtar", "application/x-gtar"); MimeMapping.AddMimeMapping(".gif", "image/gif"); MimeMapping.AddMimeMapping(".gz", "application/x-gzip"); MimeMapping.AddMimeMapping(".hta", "application/hta"); MimeMapping.AddMimeMapping(".htc", "text/x-component"); MimeMapping.AddMimeMapping(".htt", "text/webviewhtml"); MimeMapping.AddMimeMapping(".h", "text/plain"); MimeMapping.AddMimeMapping(".hdf", "application/x-hdf"); MimeMapping.AddMimeMapping(".hlp", "application/winhlp"); MimeMapping.AddMimeMapping(".html", "text/html"); MimeMapping.AddMimeMapping(".htm", "text/html"); MimeMapping.AddMimeMapping(".hqx", "application/mac-binhex40"); MimeMapping.AddMimeMapping(".isp", "application/x-internet-signup"); MimeMapping.AddMimeMapping(".iii", "application/x-iphone"); MimeMapping.AddMimeMapping(".ief", "image/ief"); MimeMapping.AddMimeMapping(".ivf", "video/x-ivf"); MimeMapping.AddMimeMapping(".ins", "application/x-internet-signup"); MimeMapping.AddMimeMapping(".ico", "image/x-icon"); MimeMapping.AddMimeMapping(".jpg", "image/jpeg"); MimeMapping.AddMimeMapping(".jfif", "image/pjpeg"); MimeMapping.AddMimeMapping(".jpe", "image/jpeg"); MimeMapping.AddMimeMapping(".jpeg", "image/jpeg"); MimeMapping.AddMimeMapping(".js", "application/x-javascript"); MimeMapping.AddMimeMapping(".lsx", "video/x-la-asf"); MimeMapping.AddMimeMapping(".latex", "application/x-latex"); MimeMapping.AddMimeMapping(".lsf", "video/x-la-asf"); MimeMapping.AddMimeMapping(".manifest", "application/x-ms-manifest"); MimeMapping.AddMimeMapping(".mhtml", "message/rfc822"); MimeMapping.AddMimeMapping(".mny", "application/x-msmoney"); MimeMapping.AddMimeMapping(".mht", "message/rfc822"); MimeMapping.AddMimeMapping(".mid", "audio/mid"); MimeMapping.AddMimeMapping(".mpv2", "video/mpeg"); MimeMapping.AddMimeMapping(".man", "application/x-troff-man"); MimeMapping.AddMimeMapping(".mvb", "application/x-msmediaview"); MimeMapping.AddMimeMapping(".mpeg", "video/mpeg"); MimeMapping.AddMimeMapping(".m3u", "audio/x-mpegurl"); MimeMapping.AddMimeMapping(".mdb", "application/x-msaccess"); MimeMapping.AddMimeMapping(".mpp", "application/vnd.ms-project"); MimeMapping.AddMimeMapping(".m1v", "video/mpeg"); MimeMapping.AddMimeMapping(".mpa", "video/mpeg"); MimeMapping.AddMimeMapping(".me", "application/x-troff-me"); MimeMapping.AddMimeMapping(".m13", "application/x-msmediaview"); MimeMapping.AddMimeMapping(".movie", "video/x-sgi-movie"); MimeMapping.AddMimeMapping(".m14", "application/x-msmediaview"); MimeMapping.AddMimeMapping(".mpe", "video/mpeg"); MimeMapping.AddMimeMapping(".mp2", "video/mpeg"); MimeMapping.AddMimeMapping(".mov", "video/quicktime"); MimeMapping.AddMimeMapping(".mp3", "audio/mpeg"); MimeMapping.AddMimeMapping(".mpg", "video/mpeg"); MimeMapping.AddMimeMapping(".ms", "application/x-troff-ms"); MimeMapping.AddMimeMapping(".nc", "application/x-netcdf"); MimeMapping.AddMimeMapping(".nws", "message/rfc822"); MimeMapping.AddMimeMapping(".oda", "application/oda"); MimeMapping.AddMimeMapping(".ods", "application/oleobject"); MimeMapping.AddMimeMapping(".pmc", "application/x-perfmon"); MimeMapping.AddMimeMapping(".p7r", "application/x-pkcs7-certreqresp"); MimeMapping.AddMimeMapping(".p7b", "application/x-pkcs7-certificates"); MimeMapping.AddMimeMapping(".p7s", "application/pkcs7-signature"); MimeMapping.AddMimeMapping(".pmw", "application/x-perfmon"); MimeMapping.AddMimeMapping(".ps", "application/postscript"); MimeMapping.AddMimeMapping(".p7c", "application/pkcs7-mime"); MimeMapping.AddMimeMapping(".pbm", "image/x-portable-bitmap"); MimeMapping.AddMimeMapping(".ppm", "image/x-portable-pixmap"); MimeMapping.AddMimeMapping(".pub", "application/x-mspublisher"); MimeMapping.AddMimeMapping(".pnm", "image/x-portable-anymap"); MimeMapping.AddMimeMapping(".png", "image/png"); MimeMapping.AddMimeMapping(".pml", "application/x-perfmon"); MimeMapping.AddMimeMapping(".p10", "application/pkcs10"); MimeMapping.AddMimeMapping(".pfx", "application/x-pkcs12"); MimeMapping.AddMimeMapping(".p12", "application/x-pkcs12"); MimeMapping.AddMimeMapping(".pdf", "application/pdf"); MimeMapping.AddMimeMapping(".pps", "application/vnd.ms-powerpoint"); MimeMapping.AddMimeMapping(".p7m", "application/pkcs7-mime"); MimeMapping.AddMimeMapping(".pko", "application/vndms-pkipko"); MimeMapping.AddMimeMapping(".ppt", "application/vnd.ms-powerpoint"); MimeMapping.AddMimeMapping(".pmr", "application/x-perfmon"); MimeMapping.AddMimeMapping(".pma", "application/x-perfmon"); MimeMapping.AddMimeMapping(".pot", "application/vnd.ms-powerpoint"); MimeMapping.AddMimeMapping(".prf", "application/pics-rules"); MimeMapping.AddMimeMapping(".pgm", "image/x-portable-graymap"); MimeMapping.AddMimeMapping(".qt", "video/quicktime"); MimeMapping.AddMimeMapping(".ra", "audio/x-pn-realaudio"); MimeMapping.AddMimeMapping(".rgb", "image/x-rgb"); MimeMapping.AddMimeMapping(".ram", "audio/x-pn-realaudio"); MimeMapping.AddMimeMapping(".rmi", "audio/mid"); MimeMapping.AddMimeMapping(".ras", "image/x-cmu-raster"); MimeMapping.AddMimeMapping(".roff", "application/x-troff"); MimeMapping.AddMimeMapping(".rtf", "application/rtf"); MimeMapping.AddMimeMapping(".rtx", "text/richtext"); MimeMapping.AddMimeMapping(".sv4crc", "application/x-sv4crc"); MimeMapping.AddMimeMapping(".spc", "application/x-pkcs7-certificates"); MimeMapping.AddMimeMapping(".setreg", "application/set-registration-initiation"); MimeMapping.AddMimeMapping(".snd", "audio/basic"); MimeMapping.AddMimeMapping(".stl", "application/vndms-pkistl"); MimeMapping.AddMimeMapping(".setpay", "application/set-payment-initiation"); MimeMapping.AddMimeMapping(".stm", "text/html"); MimeMapping.AddMimeMapping(".shar", "application/x-shar"); MimeMapping.AddMimeMapping(".sh", "application/x-sh"); MimeMapping.AddMimeMapping(".sit", "application/x-stuffit"); MimeMapping.AddMimeMapping(".spl", "application/futuresplash"); MimeMapping.AddMimeMapping(".sct", "text/scriptlet"); MimeMapping.AddMimeMapping(".scd", "application/x-msschedule"); MimeMapping.AddMimeMapping(".sst", "application/vndms-pkicertstore"); MimeMapping.AddMimeMapping(".src", "application/x-wais-source"); MimeMapping.AddMimeMapping(".sv4cpio", "application/x-sv4cpio"); MimeMapping.AddMimeMapping(".tex", "application/x-tex"); MimeMapping.AddMimeMapping(".tgz", "application/x-compressed"); MimeMapping.AddMimeMapping(".t", "application/x-troff"); MimeMapping.AddMimeMapping(".tar", "application/x-tar"); MimeMapping.AddMimeMapping(".tr", "application/x-troff"); MimeMapping.AddMimeMapping(".tif", "image/tiff"); MimeMapping.AddMimeMapping(".txt", "text/plain"); MimeMapping.AddMimeMapping(".texinfo", "application/x-texinfo"); MimeMapping.AddMimeMapping(".trm", "application/x-msterminal"); MimeMapping.AddMimeMapping(".tiff", "image/tiff"); MimeMapping.AddMimeMapping(".tcl", "application/x-tcl"); MimeMapping.AddMimeMapping(".texi", "application/x-texinfo"); MimeMapping.AddMimeMapping(".tsv", "text/tab-separated-values"); MimeMapping.AddMimeMapping(".ustar", "application/x-ustar"); MimeMapping.AddMimeMapping(".uls", "text/iuls"); MimeMapping.AddMimeMapping(".vcf", "text/x-vcard"); MimeMapping.AddMimeMapping(".wps", "application/vnd.ms-works"); MimeMapping.AddMimeMapping(".wav", "audio/wav"); MimeMapping.AddMimeMapping(".wrz", "x-world/x-vrml"); MimeMapping.AddMimeMapping(".wri", "application/x-mswrite"); MimeMapping.AddMimeMapping(".wks", "application/vnd.ms-works"); MimeMapping.AddMimeMapping(".wmf", "application/x-msmetafile"); MimeMapping.AddMimeMapping(".wcm", "application/vnd.ms-works"); MimeMapping.AddMimeMapping(".wrl", "x-world/x-vrml"); MimeMapping.AddMimeMapping(".wdb", "application/vnd.ms-works"); MimeMapping.AddMimeMapping(".wsdl", "text/xml"); MimeMapping.AddMimeMapping(".xap", "application/x-silverlight-app"); MimeMapping.AddMimeMapping(".xml", "text/xml"); MimeMapping.AddMimeMapping(".xlm", "application/vnd.ms-excel"); MimeMapping.AddMimeMapping(".xaf", "x-world/x-vrml"); MimeMapping.AddMimeMapping(".xla", "application/vnd.ms-excel"); MimeMapping.AddMimeMapping(".xls", "application/vnd.ms-excel"); MimeMapping.AddMimeMapping(".xof", "x-world/x-vrml"); MimeMapping.AddMimeMapping(".xlt", "application/vnd.ms-excel"); MimeMapping.AddMimeMapping(".xlc", "application/vnd.ms-excel"); MimeMapping.AddMimeMapping(".xsl", "text/xml"); MimeMapping.AddMimeMapping(".xbm", "image/x-xbitmap"); MimeMapping.AddMimeMapping(".xlw", "application/vnd.ms-excel"); MimeMapping.AddMimeMapping(".xpm", "image/x-xpixmap"); MimeMapping.AddMimeMapping(".xwd", "image/x-xwindowdump"); MimeMapping.AddMimeMapping(".xsd", "text/xml"); MimeMapping.AddMimeMapping(".z", "application/x-compress"); MimeMapping.AddMimeMapping(".zip", "application/x-zip-compressed"); MimeMapping.AddMimeMapping(".*", "application/octet-stream"); } } //需要调用的时候 string file = @"MimeType.txt"; string contentType = MimeMapping.GetMimeMapping(file); Console。WriteLine("{0}'s MIME TYPE: {1}", file, contentType);
优点：
1. MIME TYPE获取方便，无权限干扰；
2. 可以随时添加新的MIME类型（Content Type）。
缺点：
需要自己写代码。
