Content Type Mapping

/// <summary>
      /// 用副檔名取得Content Type名稱
      /// </summary>
      /// <param name="Extension"></param>
      /// <returns></returns>
      public static String GetContentType(String ExtensionName)
      {
          String ContentType = String.Empty;

          ExtensionName = (!ExtensionName.Substring(0, 1).Equals(".")) ? "." + ExtensionName : ExtensionName;

          if (!_ContentTypeMapping.TryGetValue(ExtensionName, out ContentType))
          {
              ContentType = _ContentTypeMapping[".*"];
          }

          return ContentType;
      }

      /// <summary>
      /// Content Type Index
      /// </summary>
      public static readonly System.Collections.Generic.IDictionary<string, string> _ContentTypeMapping =
          new System.Collections.Generic.Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
      {
          { ".*", "application/octet-stream" },
          { ".323", "text/h323" },
          { ".aaf", "application/octet-stream" },
          { ".aca", "application/octet-stream" },
          { ".accdb", "application/msaccess" },
          { ".accde", "application/msaccess" },
          { ".accdt", "application/msaccess" },
          { ".acx", "application/internet-property-stream" },
          { ".afm", "application/octet-stream" },
          { ".ai", "application/postscript" },
          { ".aif", "audio/x-aiff" },
          { ".aifc", "audio/aiff" },
          { ".aiff", "audio/aiff" },
          { ".application", "application/x-ms-application" },
          { ".art", "image/x-jg" },
          { ".asd", "application/octet-stream" },
          { ".asf", "video/x-ms-asf" },
          { ".asi", "application/octet-stream" },
          { ".asm", "text/plain" },
          { ".asr", "video/x-ms-asf" },
          { ".asx", "video/x-ms-asf" },
          { ".atom", "application/atom+xml" },
          { ".au", "audio/basic" },
          { ".avi", "video/x-msvideo" },
          { ".axs", "application/olescript" },
          { ".bas", "text/plain" },
          { ".bcpio", "application/x-bcpio" },
          { ".bin", "application/octet-stream" },
          { ".bmp", "image/bmp" },
          { ".c", "text/plain" },
          { ".cab", "application/octet-stream" },
          { ".calx", "application/vnd.ms-office.calx" },
          { ".cat", "application/vnd.ms-pki.seccat" },
          { ".cdf", "application/x-cdf" },
          { ".chm", "application/octet-stream" },
          { ".class", "application/x-java-applet" },
          { ".clp", "application/x-msclip" },
          { ".cmx", "image/x-cmx" },
          { ".cnf", "text/plain" },
          { ".cod", "image/cis-cod" },
          { ".cpio", "application/x-cpio" },
          { ".cpp", "text/plain" },
          { ".crd", "application/x-mscardfile" },
          { ".crl", "application/pkix-crl" },
          { ".crt", "application/x-x509-ca-cert" },
          { ".csh", "application/x-csh" },
          { ".css", "text/css" },
          { ".csv", "application/octet-stream" },
          { ".cur", "application/octet-stream" },
          { ".dcr", "application/x-director" },
          { ".deploy", "application/octet-stream" },
          { ".der", "application/x-x509-ca-cert" },
          { ".dib", "image/bmp" },
          { ".dir", "application/x-director" },
          { ".disco", "text/xml" },
          { ".dll", "application/x-msdownload" },
          { ".dll.config", "text/xml" },
          { ".dlm", "text/dlm" },
          { ".doc", "application/msword" },
          { ".docm", "application/vnd.ms-word.document.macroEnabled.12" },
          { ".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document" },
          { ".dot", "application/msword" },
          { ".dotm", "application/vnd.ms-word.template.macroEnabled.12" },
          { ".dotx", "application/vnd.openxmlformats-officedocument.wordprocessingml.template" },
          { ".dsp", "application/octet-stream" },
          { ".dtd", "text/xml" },
          { ".dvi", "application/x-dvi" },
          { ".dwf", "drawing/x-dwf" },
          { ".dwp", "application/octet-stream" },
          { ".dxr", "application/x-director" },
          { ".eml", "message/rfc822" },
          { ".emz", "application/octet-stream" },
          { ".eot", "application/octet-stream" },
          { ".eps", "application/postscript" },
          { ".etx", "text/x-setext" },
          { ".evy", "application/envoy" },
          { ".exe", "application/octet-stream" },
          { ".exe.config", "text/xml" },
          { ".fdf", "application/vnd.fdf" },
          { ".fif", "application/fractals" },
          { ".fla", "application/octet-stream" },
          { ".flr", "x-world/x-vrml" },
          { ".flv", "video/x-flv" },
          { ".gif", "image/gif" },
          { ".gtar", "application/x-gtar" },
          { ".gz", "application/x-gzip" },
          { ".h", "text/plain" },
          { ".hdf", "application/x-hdf" },
          { ".hdml", "text/x-hdml" },
          { ".hhc", "application/x-oleobject" },
          { ".hhk", "application/octet-stream" },
          { ".hhp", "application/octet-stream" },
          { ".hlp", "application/winhlp" },
          { ".hqx", "application/mac-binhex40" },
          { ".hta", "application/hta" },
          { ".htc", "text/x-component" },
          { ".htm", "text/html" },
          { ".html", "text/html" },
          { ".htt", "text/webviewhtml" },
          { ".hxt", "text/html" },
          { ".ico", "image/x-icon" },
          { ".ics", "application/octet-stream" },
          { ".ief", "image/ief" },
          { ".iii", "application/x-iphone" },
          { ".inf", "application/octet-stream" },
          { ".ins", "application/x-internet-signup" },
          { ".isp", "application/x-internet-signup" },
          { ".IVF", "video/x-ivf" },
          { ".jar", "application/java-archive" },
          { ".java", "application/octet-stream" },
          { ".jck", "application/liquidmotion" },
          { ".jcz", "application/liquidmotion" },
          { ".jfif", "image/pjpeg" },
          { ".jpb", "application/octet-stream" },
          { ".jpe", "image/jpeg" },
          { ".jpeg", "image/jpeg" },
          { ".jpg", "image/jpeg" },
          { ".js", "application/x-javascript" },
          { ".jsx", "text/jscript" },
          { ".latex", "application/x-latex" },
          { ".lit", "application/x-ms-reader" },
          { ".lpk", "application/octet-stream" },
          { ".lsf", "video/x-la-asf" },
          { ".lsx", "video/x-la-asf" },
          { ".lzh", "application/octet-stream" },
          { ".m13", "application/x-msmediaview" },
          { ".m14", "application/x-msmediaview" },
          { ".m1v", "video/mpeg" },
          { ".m3u", "audio/x-mpegurl" },
          { ".man", "application/x-troff-man" },
          { ".manifest", "application/x-ms-manifest" },
          { ".map", "text/plain" },
          { ".mdb", "application/x-msaccess" },
          { ".mdp", "application/octet-stream" },
          { ".me", "application/x-troff-me" },
          { ".mht", "message/rfc822" },
          { ".mhtml", "message/rfc822" },
          { ".mid", "audio/mid" },
          { ".midi", "audio/mid" },
          { ".mix", "application/octet-stream" },
          { ".mmf", "application/x-smaf" },
          { ".mno", "text/xml" },
          { ".mny", "application/x-msmoney" },
          { ".mov", "video/quicktime" },
          { ".movie", "video/x-sgi-movie" },
          { ".mp2", "video/mpeg" },
          { ".mp3", "audio/mpeg" },
          { ".mpa", "video/mpeg" },
          { ".mpe", "video/mpeg" },
          { ".mpeg", "video/mpeg" },
          { ".mpg", "video/mpeg" },
          { ".mpp", "application/vnd.ms-project" },
          { ".mpv2", "video/mpeg" },
          { ".ms", "application/x-troff-ms" },
          { ".msi", "application/octet-stream" },
          { ".mso", "application/octet-stream" },
          { ".mvb", "application/x-msmediaview" },
          { ".mvc", "application/x-miva-compiled" },
          { ".nc", "application/x-netcdf" },
          { ".nsc", "video/x-ms-asf" },
          { ".nws", "message/rfc822" },
          { ".ocx", "application/octet-stream" },
          { ".oda", "application/oda" },
          { ".odc", "text/x-ms-odc" },
          { ".ods", "application/oleobject" },
          { ".one", "application/onenote" },
          { ".onea", "application/onenote" },
          { ".onetoc", "application/onenote" },
          { ".onetoc2", "application/onenote" },
          { ".onetmp", "application/onenote" },
          { ".onepkg", "application/onenote" },
          { ".osdx", "application/opensearchdescription+xml" },
          { ".p10", "application/pkcs10" },
          { ".p12", "application/x-pkcs12" },
          { ".p7b", "application/x-pkcs7-certificates" },
          { ".p7c", "application/pkcs7-mime" },
          { ".p7m", "application/pkcs7-mime" },
          { ".p7r", "application/x-pkcs7-certreqresp" },
          { ".p7s", "application/pkcs7-signature" },
          { ".pbm", "image/x-portable-bitmap" },
          { ".pcx", "application/octet-stream" },
          { ".pcz", "application/octet-stream" },
          { ".pdf", "application/pdf" },
          { ".pfb", "application/octet-stream" },
          { ".pfm", "application/octet-stream" },
          { ".pfx", "application/x-pkcs12" },
          { ".pgm", "image/x-portable-graymap" },
          { ".pko", "application/vnd.ms-pki.pko" },
          { ".pma", "application/x-perfmon" },
          { ".pmc", "application/x-perfmon" },
          { ".pml", "application/x-perfmon" },
          { ".pmr", "application/x-perfmon" },
          { ".pmw", "application/x-perfmon" },
          { ".png", "image/png" },
          { ".pnm", "image/x-portable-anymap" },
          { ".pnz", "image/png" },
          { ".pot", "application/vnd.ms-powerpoint" },
          { ".potm", "application/vnd.ms-powerpoint.template.macroEnabled.12" },
          { ".potx", "application/vnd.openxmlformats-officedocument.presentationml.template" },
          { ".ppam", "application/vnd.ms-powerpoint.addin.macroEnabled.12" },
          { ".ppm", "image/x-portable-pixmap" },
          { ".pps", "application/vnd.ms-powerpoint" },
          { ".ppsm", "application/vnd.ms-powerpoint.slideshow.macroEnabled.12" },
          { ".ppsx", "application/vnd.openxmlformats-officedocument.presentationml.slideshow" },
          { ".ppt", "application/vnd.ms-powerpoint" },
          { ".pptm", "application/vnd.ms-powerpoint.presentation.macroEnabled.12" },
          { ".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation" },
          { ".prf", "application/pics-rules" },
          { ".prm", "application/octet-stream" },
          { ".prx", "application/octet-stream" },
          { ".ps", "application/postscript" },
          { ".psd", "application/octet-stream" },
          { ".psm", "application/octet-stream" },
          { ".psp", "application/octet-stream" },
          { ".pub", "application/x-mspublisher" },
          { ".qt", "video/quicktime" },
          { ".qtl", "application/x-quicktimeplayer" },
          { ".qxd", "application/octet-stream" },
          { ".ra", "audio/x-pn-realaudio" },
          { ".ram", "audio/x-pn-realaudio" },
          { ".rar", "application/octet-stream" },
          { ".ras", "image/x-cmu-raster" },
          { ".rf", "image/vnd.rn-realflash" },
          { ".rgb", "image/x-rgb" },
          { ".rm", "application/vnd.rn-realmedia" },
          { ".rmi", "audio/mid" },
          { ".roff", "application/x-troff" },
          { ".rpm", "audio/x-pn-realaudio-plugin" },
          { ".rtf", "application/rtf" },
          { ".rtx", "text/richtext" },
          { ".scd", "application/x-msschedule" },
          { ".sct", "text/scriptlet" },
          { ".sea", "application/octet-stream" },
          { ".setpay", "application/set-payment-initiation" },
          { ".setreg", "application/set-registration-initiation" },
          { ".sgml", "text/sgml" },
          { ".sh", "application/x-sh" },
          { ".shar", "application/x-shar" },
          { ".sit", "application/x-stuffit" },
          { ".sldm", "application/vnd.ms-powerpoint.slide.macroEnabled.12" },
          { ".sldx", "application/vnd.openxmlformats-officedocument.presentationml.slide" },
          { ".smd", "audio/x-smd" },
          { ".smi", "application/octet-stream" },
          { ".smx", "audio/x-smd" },
          { ".smz", "audio/x-smd" },
          { ".snd", "audio/basic" },
          { ".snp", "application/octet-stream" },
          { ".spc", "application/x-pkcs7-certificates" },
          { ".spl", "application/futuresplash" },
          { ".src", "application/x-wais-source" },
          { ".ssm", "application/streamingmedia" },
          { ".sst", "application/vnd.ms-pki.certstore" },
          { ".stl", "application/vnd.ms-pki.stl" },
          { ".sv4cpio", "application/x-sv4cpio" },
          { ".sv4crc", "application/x-sv4crc" },
          { ".swf", "application/x-shockwave-flash" },
          { ".t", "application/x-troff" },
          { ".tar", "application/x-tar" },
          { ".tcl", "application/x-tcl" },
          { ".tex", "application/x-tex" },
          { ".texi", "application/x-texinfo" },
          { ".texinfo", "application/x-texinfo" },
          { ".tgz", "application/x-compressed" },
          { ".thmx", "application/vnd.ms-officetheme" },
          { ".thn", "application/octet-stream" },
          { ".tif", "image/tiff" },
          { ".tiff", "image/tiff" },
          { ".toc", "application/octet-stream" },
          { ".tr", "application/x-troff" },
          { ".trm", "application/x-msterminal" },
          { ".tsv", "text/tab-separated-values" },
          { ".ttf", "application/octet-stream" },
          { ".txt", "text/plain" },
          { ".u32", "application/octet-stream" },
          { ".uls", "text/iuls" },
          { ".ustar", "application/x-ustar" },
          { ".vbs", "text/vbscript" },
          { ".vcf", "text/x-vcard" },
          { ".vcs", "text/plain" },
          { ".vdx", "application/vnd.ms-visio.viewer" },
          { ".vml", "text/xml" },
          { ".vsd", "application/vnd.visio" },
          { ".vss", "application/vnd.visio" },
          { ".vst", "application/vnd.visio" },
          { ".vsto", "application/x-ms-vsto" },
          { ".vsw", "application/vnd.visio" },
          { ".vsx", "application/vnd.visio" },
          { ".vtx", "application/vnd.visio" },
          { ".wav", "audio/wav" },
          { ".wax", "audio/x-ms-wax" },
          { ".wbmp", "image/vnd.wap.wbmp" },
          { ".wcm", "application/vnd.ms-works" },
          { ".wdb", "application/vnd.ms-works" },
          { ".wks", "application/vnd.ms-works" },
          { ".wm", "video/x-ms-wm" },
          { ".wma", "audio/x-ms-wma" },
          { ".wmd", "application/x-ms-wmd" },
          { ".wmf", "application/x-msmetafile" },
          { ".wml", "text/vnd.wap.wml" },
          { ".wmlc", "application/vnd.wap.wmlc" },
          { ".wmls", "text/vnd.wap.wmlscript" },
          { ".wmlsc", "application/vnd.wap.wmlscriptc" },
          { ".wmp", "video/x-ms-wmp" },
          { ".wmv", "video/x-ms-wmv" },
          { ".wmx", "video/x-ms-wmx" },
          { ".wmz", "application/x-ms-wmz" },
          { ".wps", "application/vnd.ms-works" },
          { ".wri", "application/x-mswrite" },
          { ".wrl", "x-world/x-vrml" },
          { ".wrz", "x-world/x-vrml" },
          { ".wsdl", "text/xml" },
          { ".wvx", "video/x-ms-wvx" },
          { ".x", "application/directx" },
          { ".xaf", "x-world/x-vrml" },
          { ".xaml", "application/xaml+xml" },
          { ".xap", "application/x-silverlight-app" },
          { ".xbap", "application/x-ms-xbap" },
          { ".xbm", "image/x-xbitmap" },
          { ".xdr", "text/plain" },
          { ".xla", "application/vnd.ms-excel" },
          { ".xlam", "application/vnd.ms-excel.addin.macroEnabled.12" },
          { ".xlc", "application/vnd.ms-excel" },
          { ".xlm", "application/vnd.ms-excel" },
          { ".xls", "application/vnd.ms-excel" },
          { ".xlsb", "application/vnd.ms-excel.sheet.binary.macroEnabled.12" },
          { ".xlsm", "application/vnd.ms-excel.sheet.macroEnabled.12" },
          { ".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" },
          { ".xlt", "application/vnd.ms-excel" },
          { ".xltm", "application/vnd.ms-excel.template.macroEnabled.12" },
          { ".xltx", "application/vnd.openxmlformats-officedocument.spreadsheetml.template" },
          { ".xlw", "application/vnd.ms-excel" },
          { ".xml", "text/xml" },
          { ".xof", "x-world/x-vrml" },
          { ".xpm", "image/x-xpixmap" },
          { ".xps", "application/vnd.ms-xpsdocument" },
          { ".xsd", "text/xml" },
          { ".xsf", "text/xml" },
          { ".xsl", "text/xml" },
          { ".xslt", "text/xml" },
          { ".xsn", "application/octet-stream" },
          { ".xtp", "application/octet-stream" },
          { ".xwd", "image/x-xwindowdump" },
          { ".z", "application/x-compress" },
          { ".zip", "application/x-zip-compressed" }
      };