如何从文件扩展名中获取MIME类型？
这些选项在ASP.NET Core中有所更改，这里是（credits）：
受塞缪尔回答的启发，我写了一个改进的版本：
为了使该帖子更加全面，对于。NET Core
**使用MediaTypeNames类->样本：MediaTypeNames.Application.Pdf **MIME content types
我知道问题是针对C＃的，我只是想保留Javascript格式，因为我刚刚转换了Samuel的答案：
您可以使用public void Configure(IApplicationBuilder app)
{
// Set up custom content types -associating file extension to MIME type
var provider = new FileExtensionContentTypeProvider();
// Add new mappings
provider.Mappings[".myapp"] = "application/x-msdownload";
provider.Mappings[".htm3"] = "text/html";
provider.Mappings[".image"] = "image/png";
// Replace an existing mapping
provider.Mappings[".rtf"] = "application/x-msdownload";
// Remove MP4 videos.
provider.Mappings.Remove(".mp4");
app.UseStaticFiles(new StaticFileOptions()
{
FileProvider = new PhysicalFileProvider(
Path.Combine(Directory.GetCurrentDirectory(), @"wwwroot", "images")),
RequestPath = new PathString("/MyImages"),
ContentTypeProvider = provider
});
app.UseDirectoryBrowser(new DirectoryBrowserOptions()
{
FileProvider = new PhysicalFileProvider(
Path.Combine(Directory.GetCurrentDirectory(), @"wwwroot", "images")),
RequestPath = new PathString("/MyImages")
});
}
的httpd提供的表格。将其映射到函数，字典，列表等中应该不容易。
如果您不想添加其他依赖项，但仍然想要版本无关的请求，则可以将export const contentTypes = {
".323": "text/h323",
".3g2": "video/3gpp2",
".3gp": "video/3gpp",
".3gp2": "video/3gpp2",
".3gpp": "video/3gpp",
".7z": "application/x-7z-compressed",
".aa": "audio/audible",
".AAC": "audio/aac",
".aaf": "application/octet-stream",
".aax": "audio/vnd.audible.aax",
".ac3": "audio/ac3",
".aca": "application/octet-stream",
".accda": "application/msaccess.addin",
".accdb": "application/msaccess",
".accdc": "application/msaccess.cab",
".accde": "application/msaccess",
".accdr": "application/msaccess.runtime",
".accdt": "application/msaccess",
".accdw": "application/msaccess.webapplication",
".accft": "application/msaccess.ftemplate",
".acx": "application/internet-property-stream",
".AddIn": "text/xml",
".ade": "application/msaccess",
".adobebridge": "application/x-bridge-url",
".adp": "application/msaccess",
".ADT": "audio/vnd.dlna.adts",
".ADTS": "audio/aac",
".afm": "application/octet-stream",
".ai": "application/postscript",
".aif": "audio/x-aiff",
".aifc": "audio/aiff",
".aiff": "audio/aiff",
".air": "application/vnd.adobe.air-application-installer-package+zip",
".amc": "application/x-mpeg",
".application": "application/x-ms-application",
".art": "image/x-jg",
".asa": "application/xml",
".asax": "application/xml",
".ascx": "application/xml",
".asd": "application/octet-stream",
".asf": "video/x-ms-asf",
".ashx": "application/xml",
".asi": "application/octet-stream",
".asm": "text/plain",
".asmx": "application/xml",
".aspx": "application/xml",
".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",
".caf": "audio/x-caf",
".calx": "application/vnd.ms-office.calx",
".cat": "application/vnd.ms-pki.seccat",
".cc": "text/plain",
".cd": "text/plain",
".cdda": "audio/aiff",
".cdf": "application/x-cdf",
".cer": "application/x-x509-ca-cert",
".chm": "application/octet-stream",
".class": "application/x-java-applet",
".clp": "application/x-msclip",
".cmx": "image/x-cmx",
".cnf": "text/plain",
".cod": "image/cis-cod",
".config": "application/xml",
".contact": "text/x-ms-contact",
".coverage": "application/xml",
".cpio": "application/x-cpio",
".cpp": "text/plain",
".crd": "application/x-mscardfile",
".crl": "application/pkix-crl",
".crt": "application/x-x509-ca-cert",
".cs": "text/plain",
".csdproj": "text/plain",
".csh": "application/x-csh",
".csproj": "text/plain",
".css": "text/css",
".csv": "text/csv",
".cur": "application/octet-stream",
".cxx": "text/plain",
".dat": "application/octet-stream",
".datasource": "application/xml",
".dbproj": "text/plain",
".dcr": "application/x-director",
".def": "text/plain",
".deploy": "application/octet-stream",
".der": "application/x-x509-ca-cert",
".dgml": "application/xml",
".dib": "image/bmp",
".dif": "video/x-dv",
".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",
".dsw": "text/plain",
".dtd": "text/xml",
".dtsConfig": "text/xml",
".dv": "video/x-dv",
".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",
".etl": "application/etl",
".etx": "text/x-setext",
".evy": "application/envoy",
".exe": "application/octet-stream",
".exe.config": "text/xml",
".fdf": "application/vnd.fdf",
".fif": "application/fractals",
".filters": "Application/xml",
".fla": "application/octet-stream",
".flr": "x-world/x-vrml",
".flv": "video/x-flv",
".fsscript": "application/fsharp-script",
".fsx": "application/fsharp-script",
".generictest": "application/xml",
".gif": "image/gif",
".group": "text/x-ms-group",
".gsm": "audio/x-gsm",
".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",
".hpp": "text/plain",
".hqx": "application/mac-binhex40",
".hta": "application/hta",
".htc": "text/x-component",
".htm": "text/html",
".html": "text/html",
".htt": "text/webviewhtml",
".hxa": "application/xml",
".hxc": "application/xml",
".hxd": "application/octet-stream",
".hxe": "application/xml",
".hxf": "application/xml",
".hxh": "application/octet-stream",
".hxi": "application/octet-stream",
".hxk": "application/xml",
".hxq": "application/octet-stream",
".hxr": "application/octet-stream",
".hxs": "application/octet-stream",
".hxt": "text/html",
".hxv": "application/xml",
".hxw": "application/octet-stream",
".hxx": "text/plain",
".i": "text/plain",
".ico": "image/x-icon",
".ics": "application/octet-stream",
".idl": "text/plain",
".ief": "image/ief",
".iii": "application/x-iphone",
".inc": "text/plain",
".inf": "application/octet-stream",
".inl": "text/plain",
".ins": "application/x-internet-signup",
".ipa": "application/x-itunes-ipa",
".ipg": "application/x-itunes-ipg",
".ipproj": "text/plain",
".ipsw": "application/x-itunes-ipsw",
".iqy": "text/x-ms-iqy",
".isp": "application/x-internet-signup",
".ite": "application/x-itunes-ite",
".itlp": "application/x-itunes-itlp",
".itms": "application/x-itunes-itms",
".itpc": "application/x-itunes-itpc",
".IVF": "video/x-ivf",
".jar": "application/java-archive",
".java": "application/octet-stream",
".jck": "application/liquidmotion",
".jcz": "application/liquidmotion",
".jfif": "image/pjpeg",
".jnlp": "application/x-java-jnlp-file",
".jpb": "application/octet-stream",
".jpe": "image/jpeg",
".jpeg": "image/jpeg",
".jpg": "image/jpeg",
".js": "application/x-javascript",
".json": "application/json",
".jsx": "text/jscript",
".jsxbin": "text/plain",
".latex": "application/x-latex",
".library-ms": "application/windows-library+xml",
".lit": "application/x-ms-reader",
".loadtest": "application/xml",
".lpk": "application/octet-stream",
".lsf": "video/x-la-asf",
".lst": "text/plain",
".lsx": "video/x-la-asf",
".lzh": "application/octet-stream",
".m13": "application/x-msmediaview",
".m14": "application/x-msmediaview",
".m1v": "video/mpeg",
".m2t": "video/vnd.dlna.mpeg-tts",
".m2ts": "video/vnd.dlna.mpeg-tts",
".m2v": "video/mpeg",
".m3u": "audio/x-mpegurl",
".m3u8": "audio/x-mpegurl",
".m4a": "audio/m4a",
".m4b": "audio/m4b",
".m4p": "audio/m4p",
".m4r": "audio/x-m4r",
".m4v": "video/x-m4v",
".mac": "image/x-macpaint",
".mak": "text/plain",
".man": "application/x-troff-man",
".manifest": "application/x-ms-manifest",
".map": "text/plain",
".master": "application/xml",
".mda": "application/msaccess",
".mdb": "application/x-msaccess",
".mde": "application/msaccess",
".mdp": "application/octet-stream",
".me": "application/x-troff-me",
".mfp": "application/x-shockwave-flash",
".mht": "message/rfc822",
".mhtml": "message/rfc822",
".mid": "audio/mid",
".midi": "audio/mid",
".mix": "application/octet-stream",
".mk": "text/plain",
".mmf": "application/x-smaf",
".mno": "text/xml",
".mny": "application/x-msmoney",
".mod": "video/mpeg",
".mov": "video/quicktime",
".movie": "video/x-sgi-movie",
".mp2": "video/mpeg",
".mp2v": "video/mpeg",
".mp3": "audio/mpeg",
".mp4": "video/mp4",
".mp4v": "video/mp4",
".mpa": "video/mpeg",
".mpe": "video/mpeg",
".mpeg": "video/mpeg",
".mpf": "application/vnd.ms-mediapackage",
".mpg": "video/mpeg",
".mpp": "application/vnd.ms-project",
".mpv2": "video/mpeg",
".mqv": "video/quicktime",
".ms": "application/x-troff-ms",
".msi": "application/octet-stream",
".mso": "application/octet-stream",
".mts": "video/vnd.dlna.mpeg-tts",
".mtx": "application/xml",
".mvb": "application/x-msmediaview",
".mvc": "application/x-miva-compiled",
".mxp": "application/x-mmxp",
".nc": "application/x-netcdf",
".nsc": "video/x-ms-asf",
".nws": "message/rfc822",
".ocx": "application/octet-stream",
".oda": "application/oda",
".odc": "text/x-ms-odc",
".odh": "text/plain",
".odl": "text/plain",
".odp": "application/vnd.oasis.opendocument.presentation",
".ods": "application/oleobject",
".odt": "application/vnd.oasis.opendocument.text",
".one": "application/onenote",
".onea": "application/onenote",
".onepkg": "application/onenote",
".onetmp": "application/onenote",
".onetoc": "application/onenote",
".onetoc2": "application/onenote",
".orderedtest": "application/xml",
".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",
".pcast": "application/x-podcast",
".pct": "image/pict",
".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",
".pic": "image/pict",
".pict": "image/pict",
".pkgdef": "text/plain",
".pkgundef": "text/plain",
".pko": "application/vnd.ms-pki.pko",
".pls": "audio/scpls",
".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",
".pnt": "image/x-macpaint",
".pntg": "image/x-macpaint",
".pnz": "image/png",
".pot": "application/vnd.ms-powerpoint",
".potm": "application/vnd.ms-powerpoint.template.macroEnabled.12",
".potx": "application/vnd.openxmlformats-officedocument.presentationml.template",
".ppa": "application/vnd.ms-powerpoint",
".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",
".psc1": "application/PowerShell",
".psd": "application/octet-stream",
".psess": "application/xml",
".psm": "application/octet-stream",
".psp": "application/octet-stream",
".pub": "application/x-mspublisher",
".pwz": "application/vnd.ms-powerpoint",
".qht": "text/x-html-insertion",
".qhtm": "text/x-html-insertion",
".qt": "video/quicktime",
".qti": "image/x-quicktime",
".qtif": "image/x-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",
".rat": "application/rat-file",
".rc": "text/plain",
".rc2": "text/plain",
".rct": "text/plain",
".rdlc": "application/xml",
".resx": "application/xml",
".rf": "image/vnd.rn-realflash",
".rgb": "image/x-rgb",
".rgs": "text/plain",
".rm": "application/vnd.rn-realmedia",
".rmi": "audio/mid",
".rmp": "application/vnd.rn-rn_music_package",
".roff": "application/x-troff",
".rpm": "audio/x-pn-realaudio-plugin",
".rqy": "text/x-ms-rqy",
".rtf": "application/rtf",
".rtx": "text/richtext",
".ruleset": "application/xml",
".s": "text/plain",
".safariextz": "application/x-safari-safariextz",
".scd": "application/x-msschedule",
".sct": "text/scriptlet",
".sd2": "audio/x-sd2",
".sdp": "application/sdp",
".sea": "application/octet-stream",
".searchConnector-ms": "application/windows-search-connector+xml",
".setpay": "application/set-payment-initiation",
".setreg": "application/set-registration-initiation",
".settings": "application/xml",
".sgimb": "application/x-sgimb",
".sgml": "text/sgml",
".sh": "application/x-sh",
".shar": "application/x-shar",
".shtml": "text/html",
".sit": "application/x-stuffit",
".sitemap": "application/xml",
".skin": "application/xml",
".sldm": "application/vnd.ms-powerpoint.slide.macroEnabled.12",
".sldx": "application/vnd.openxmlformats-officedocument.presentationml.slide",
".slk": "application/vnd.ms-excel",
".sln": "text/plain",
".slupkg-ms": "application/x-ms-license",
".smd": "audio/x-smd",
".smi": "application/octet-stream",
".smx": "audio/x-smd",
".smz": "audio/x-smd",
".snd": "audio/basic",
".snippet": "application/xml",
".snp": "application/octet-stream",
".sol": "text/plain",
".sor": "text/plain",
".spc": "application/x-pkcs7-certificates",
".spl": "application/futuresplash",
".src": "application/x-wais-source",
".srf": "text/plain",
".SSISDeploymentManifest": "text/xml",
".ssm": "application/streamingmedia",
".sst": "application/vnd.ms-pki.certstore",
".stl": "application/vnd.ms-pki.stl",
".sv4cpio": "application/x-sv4cpio",
".sv4crc": "application/x-sv4crc",
".svc": "application/xml",
".swf": "application/x-shockwave-flash",
".t": "application/x-troff",
".tar": "application/x-tar",
".tcl": "application/x-tcl",
".testrunconfig": "application/xml",
".testsettings": "application/xml",
".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",
".tlh": "text/plain",
".tli": "text/plain",
".toc": "application/octet-stream",
".tr": "application/x-troff",
".trm": "application/x-msterminal",
".trx": "application/xml",
".ts": "video/vnd.dlna.mpeg-tts",
".tsv": "text/tab-separated-values",
".ttf": "application/octet-stream",
".tts": "video/vnd.dlna.mpeg-tts",
".txt": "text/plain",
".u32": "application/octet-stream",
".uls": "text/iuls",
".user": "text/plain",
".ustar": "application/x-ustar",
".vb": "text/plain",
".vbdproj": "text/plain",
".vbk": "video/mpeg",
".vbproj": "text/plain",
".vbs": "text/vbscript",
".vcf": "text/x-vcard",
".vcproj": "Application/xml",
".vcs": "text/plain",
".vcxproj": "Application/xml",
".vddproj": "text/plain",
".vdp": "text/plain",
".vdproj": "text/plain",
".vdx": "application/vnd.ms-visio.viewer",
".vml": "text/xml",
".vscontent": "application/xml",
".vsct": "text/xml",
".vsd": "application/vnd.visio",
".vsi": "application/ms-vsi",
".vsix": "application/vsix",
".vsixlangpack": "text/xml",
".vsixmanifest": "text/xml",
".vsmdi": "application/xml",
".vspscc": "text/plain",
".vss": "application/vnd.visio",
".vsscc": "text/plain",
".vssettings": "text/xml",
".vssscc": "text/plain",
".vst": "application/vnd.visio",
".vstemplate": "text/xml",
".vsto": "application/x-ms-vsto",
".vsw": "application/vnd.visio",
".vsx": "application/vnd.visio",
".vtx": "application/vnd.visio",
".wav": "audio/wav",
".wave": "audio/wav",
".wax": "audio/x-ms-wax",
".wbk": "application/msword",
".wbmp": "image/vnd.wap.wbmp",
".wcm": "application/vnd.ms-works",
".wdb": "application/vnd.ms-works",
".wdp": "image/vnd.ms-photo",
".webarchive": "application/x-safari-webarchive",
".webtest": "application/xml",
".wiq": "application/xml",
".wiz": "application/msword",
".wks": "application/vnd.ms-works",
".WLMP": "application/wlmoviemaker",
".wlpginstall": "application/x-wlpg-detect",
".wlpginstall3": "application/x-wlpg3-detect",
".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",
".wpl": "application/vnd.ms-wpl",
".wps": "application/vnd.ms-works",
".wri": "application/x-mswrite",
".wrl": "x-world/x-vrml",
".wrz": "x-world/x-vrml",
".wsc": "text/scriptlet",
".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",
".xht": "application/xhtml+xml",
".xhtml": "application/xhtml+xml",
".xla": "application/vnd.ms-excel",
".xlam": "application/vnd.ms-excel.addin.macroEnabled.12",
".xlc": "application/vnd.ms-excel",
".xld": "application/vnd.ms-excel",
".xlk": "application/vnd.ms-excel",
".xll": "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",
".xmta": "application/xml",
".xof": "x-world/x-vrml",
".XOML": "text/plain",
".xpm": "image/x-xpixmap",
".xps": "application/vnd.ms-xpsdocument",
".xrm-ms": "text/xml",
".xsc": "application/xml",
".xsd": "text/xml",
".xsf": "text/xml",
".xsl": "text/xml",
".xslt": "text/xml",
".xsn": "application/octet-stream",
".xss": "application/xml",
".xtp": "application/octet-stream",
".xwd": "image/x-xwindowdump",
".z": "application/x-compress",
".zip": "application/x-zip-compressed"
}
与Apache混合使用。
始终不需要通过文件扩展名计算出的哑剧类型总是正确的。
上面的布莱恩·丹尼（Bryan Denny）的帖子对我不起作用，因为并非所有扩展名都在注册表中具有“内容类型”子项。我不得不对代码进行如下调整：
我已经为mime类型和内容类型值编制了信誉良好的来源列表，这些来源仅在文件扩展名上（当前）键入。
此帮助程序类返回任何文件名的mime类型（内容类型），描述和图标：
UPDATE
我用apache列表查看这些模仿类型，下面的脚本将为您提供包含所有模仿类型的字典。
using Microsoft.Win32;
using System;
using System.Drawing;
using System.IO;
using System.Runtime.InteropServices;
public static class Helper
{
[DllImport("shell32.dll", CharSet = CharSet.Auto)]
private static extern int ExtractIconEx(string lpszFile, int nIconIndex, IntPtr[] phIconLarge, IntPtr[] phIconSmall, int nIcons);
[DllImport("user32.dll", SetLastError = true)]
private static extern int DestroyIcon(IntPtr hIcon);
public static string GetFileContentType(string fileName)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
RegistryKey registryKey = null;
try
{
FileInfo fileInfo = new FileInfo(fileName);
if (string.IsNullOrEmpty(fileInfo.Extension))
{
return string.Empty;
}
string extension = fileInfo.Extension.ToLowerInvariant();
registryKey = Registry.ClassesRoot.OpenSubKey(extension);
if (registryKey == null)
{
return string.Empty;
}
object contentTypeObject = registryKey.GetValue("Content Type");
if (!(contentTypeObject is string))
{
return string.Empty;
}
string contentType = (string)contentTypeObject;
return contentType;
}
catch (Exception)
{
return null;
}
finally
{
if (registryKey != null)
{
registryKey.Close();
}
}
}
public static string GetFileDescription(string fileName)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
RegistryKey registryKey1 = null;
RegistryKey registryKey2 = null;
try
{
FileInfo fileInfo = new FileInfo(fileName);
if (string.IsNullOrEmpty(fileInfo.Extension))
{
return string.Empty;
}
string extension = fileInfo.Extension.ToLowerInvariant();
registryKey1 = Registry.ClassesRoot.OpenSubKey(extension);
if (registryKey1 == null)
{
return string.Empty;
}
object extensionDefaultObject = registryKey1.GetValue(null);
if (!(extensionDefaultObject is string))
{
return string.Empty;
}
string extensionDefaultValue = (string)extensionDefaultObject;
registryKey2 = Registry.ClassesRoot.OpenSubKey(extensionDefaultValue);
if (registryKey2 == null)
{
return string.Empty;
}
object fileDescriptionObject = registryKey2.GetValue(null);
if (!(fileDescriptionObject is string))
{
return string.Empty;
}
string fileDescription = (string)fileDescriptionObject;
return fileDescription;
}
catch (Exception)
{
return null;
}
finally
{
if (registryKey2 != null)
{
registryKey2.Close();
}
if (registryKey1 != null)
{
registryKey1.Close();
}
}
}
public static void GetFileIcons(string fileName, out Icon smallIcon, out Icon largeIcon)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
smallIcon = null;
largeIcon = null;
RegistryKey registryKey1 = null;
RegistryKey registryKey2 = null;
try
{
FileInfo fileInfo = new FileInfo(fileName);
if (string.IsNullOrEmpty(fileInfo.Extension))
{
return;
}
string extension = fileInfo.Extension.ToLowerInvariant();
registryKey1 = Registry.ClassesRoot.OpenSubKey(extension);
if (registryKey1 == null)
{
return;
}
object extensionDefaultObject = registryKey1.GetValue(null);
if (!(extensionDefaultObject is string))
{
return;
}
string defaultIconKeyName = string.Format("{0}\\DefaultIcon", extensionDefaultObject);
registryKey2 = Registry.ClassesRoot.OpenSubKey(defaultIconKeyName);
if (registryKey2 == null)
{
return;
}
object defaultIconPathObject = registryKey2.GetValue(null);
if (!(defaultIconPathObject is string))
{
return;
}
string defaultIconPath = (string)defaultIconPathObject;
if (string.IsNullOrWhiteSpace(defaultIconPath))
{
return;
}
string iconfileName = null;
int iconIndex = 0;
int commaIndex = defaultIconPath.IndexOf(",");
if (commaIndex > 0)
{
iconfileName = defaultIconPath.Substring(0, commaIndex);
string iconIndexString = defaultIconPath.Substring(commaIndex + 1);
if (!int.TryParse(iconIndexString, out iconIndex))
{
iconIndex = 0;
}
}
else
{
iconfileName = defaultIconPath;
iconIndex = 0;
}
IntPtr[] phiconSmall = new IntPtr[1] { IntPtr.Zero };
IntPtr[] phiconLarge = new IntPtr[1] { IntPtr.Zero };
int readIconCount = ExtractIconEx(iconfileName, iconIndex, phiconLarge, phiconSmall, 1);
if (readIconCount < 0)
{
return;
}
if (phiconSmall[0] != IntPtr.Zero)
{
smallIcon = (Icon)Icon.FromHandle(phiconSmall[0]).Clone();
DestroyIcon(phiconSmall[0]);
}
if (phiconLarge[0] != IntPtr.Zero)
{
largeIcon = (Icon)Icon.FromHandle(phiconLarge[0]).Clone();
DestroyIcon(phiconLarge[0]);
}
return;
}
finally
{
if (registryKey2 != null)
{
registryKey2.Close();
}
if (registryKey1 != null)
{
registryKey1.Close();
}
}
}
}
处理文件扩展名而不是Mime。用户可以更改文件扩展名，因此请检查Mime。代码示例通过文件扩展名关联Mime，这是错误的，不起作用。
您可以使用此帮助器功能：
仅使here的private static IDictionary<string, string> _mappings = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase) {
#region Big freaking list of mime types
// combination of values from Windows 7 Registry and
// from C:\Windows\System32\inetsrv\config\applicationHost.config
// some added, including .7z and .dat
{".323", "text/h323"},
{".3g2", "video/3gpp2"},
{".3gp", "video/3gpp"},
{".3gp2", "video/3gpp2"},
{".3gpp", "video/3gpp"},
{".7z", "application/x-7z-compressed"},
{".aa", "audio/audible"},
{".AAC", "audio/aac"},
{".aaf", "application/octet-stream"},
{".aax", "audio/vnd.audible.aax"},
{".ac3", "audio/ac3"},
{".aca", "application/octet-stream"},
{".accda", "application/msaccess.addin"},
{".accdb", "application/msaccess"},
{".accdc", "application/msaccess.cab"},
{".accde", "application/msaccess"},
{".accdr", "application/msaccess.runtime"},
{".accdt", "application/msaccess"},
{".accdw", "application/msaccess.webapplication"},
{".accft", "application/msaccess.ftemplate"},
{".acx", "application/internet-property-stream"},
{".AddIn", "text/xml"},
{".ade", "application/msaccess"},
{".adobebridge", "application/x-bridge-url"},
{".adp", "application/msaccess"},
{".ADT", "audio/vnd.dlna.adts"},
{".ADTS", "audio/aac"},
{".afm", "application/octet-stream"},
{".ai", "application/postscript"},
{".aif", "audio/x-aiff"},
{".aifc", "audio/aiff"},
{".aiff", "audio/aiff"},
{".air", "application/vnd.adobe.air-application-installer-package+zip"},
{".amc", "application/x-mpeg"},
{".application", "application/x-ms-application"},
{".art", "image/x-jg"},
{".asa", "application/xml"},
{".asax", "application/xml"},
{".ascx", "application/xml"},
{".asd", "application/octet-stream"},
{".asf", "video/x-ms-asf"},
{".ashx", "application/xml"},
{".asi", "application/octet-stream"},
{".asm", "text/plain"},
{".asmx", "application/xml"},
{".aspx", "application/xml"},
{".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"},
{".caf", "audio/x-caf"},
{".calx", "application/vnd.ms-office.calx"},
{".cat", "application/vnd.ms-pki.seccat"},
{".cc", "text/plain"},
{".cd", "text/plain"},
{".cdda", "audio/aiff"},
{".cdf", "application/x-cdf"},
{".cer", "application/x-x509-ca-cert"},
{".chm", "application/octet-stream"},
{".class", "application/x-java-applet"},
{".clp", "application/x-msclip"},
{".cmx", "image/x-cmx"},
{".cnf", "text/plain"},
{".cod", "image/cis-cod"},
{".config", "application/xml"},
{".contact", "text/x-ms-contact"},
{".coverage", "application/xml"},
{".cpio", "application/x-cpio"},
{".cpp", "text/plain"},
{".crd", "application/x-mscardfile"},
{".crl", "application/pkix-crl"},
{".crt", "application/x-x509-ca-cert"},
{".cs", "text/plain"},
{".csdproj", "text/plain"},
{".csh", "application/x-csh"},
{".csproj", "text/plain"},
{".css", "text/css"},
{".csv", "text/csv"},
{".cur", "application/octet-stream"},
{".cxx", "text/plain"},
{".dat", "application/octet-stream"},
{".datasource", "application/xml"},
{".dbproj", "text/plain"},
{".dcr", "application/x-director"},
{".def", "text/plain"},
{".deploy", "application/octet-stream"},
{".der", "application/x-x509-ca-cert"},
{".dgml", "application/xml"},
{".dib", "image/bmp"},
{".dif", "video/x-dv"},
{".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"},
{".dsw", "text/plain"},
{".dtd", "text/xml"},
{".dtsConfig", "text/xml"},
{".dv", "video/x-dv"},
{".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"},
{".etl", "application/etl"},
{".etx", "text/x-setext"},
{".evy", "application/envoy"},
{".exe", "application/octet-stream"},
{".exe.config", "text/xml"},
{".fdf", "application/vnd.fdf"},
{".fif", "application/fractals"},
{".filters", "Application/xml"},
{".fla", "application/octet-stream"},
{".flr", "x-world/x-vrml"},
{".flv", "video/x-flv"},
{".fsscript", "application/fsharp-script"},
{".fsx", "application/fsharp-script"},
{".generictest", "application/xml"},
{".gif", "image/gif"},
{".group", "text/x-ms-group"},
{".gsm", "audio/x-gsm"},
{".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"},
{".hpp", "text/plain"},
{".hqx", "application/mac-binhex40"},
{".hta", "application/hta"},
{".htc", "text/x-component"},
{".htm", "text/html"},
{".html", "text/html"},
{".htt", "text/webviewhtml"},
{".hxa", "application/xml"},
{".hxc", "application/xml"},
{".hxd", "application/octet-stream"},
{".hxe", "application/xml"},
{".hxf", "application/xml"},
{".hxh", "application/octet-stream"},
{".hxi", "application/octet-stream"},
{".hxk", "application/xml"},
{".hxq", "application/octet-stream"},
{".hxr", "application/octet-stream"},
{".hxs", "application/octet-stream"},
{".hxt", "text/html"},
{".hxv", "application/xml"},
{".hxw", "application/octet-stream"},
{".hxx", "text/plain"},
{".i", "text/plain"},
{".ico", "image/x-icon"},
{".ics", "application/octet-stream"},
{".idl", "text/plain"},
{".ief", "image/ief"},
{".iii", "application/x-iphone"},
{".inc", "text/plain"},
{".inf", "application/octet-stream"},
{".inl", "text/plain"},
{".ins", "application/x-internet-signup"},
{".ipa", "application/x-itunes-ipa"},
{".ipg", "application/x-itunes-ipg"},
{".ipproj", "text/plain"},
{".ipsw", "application/x-itunes-ipsw"},
{".iqy", "text/x-ms-iqy"},
{".isp", "application/x-internet-signup"},
{".ite", "application/x-itunes-ite"},
{".itlp", "application/x-itunes-itlp"},
{".itms", "application/x-itunes-itms"},
{".itpc", "application/x-itunes-itpc"},
{".IVF", "video/x-ivf"},
{".jar", "application/java-archive"},
{".java", "application/octet-stream"},
{".jck", "application/liquidmotion"},
{".jcz", "application/liquidmotion"},
{".jfif", "image/pjpeg"},
{".jnlp", "application/x-java-jnlp-file"},
{".jpb", "application/octet-stream"},
{".jpe", "image/jpeg"},
{".jpeg", "image/jpeg"},
{".jpg", "image/jpeg"},
{".js", "application/x-javascript"},
{".json", "application/json"},
{".jsx", "text/jscript"},
{".jsxbin", "text/plain"},
{".latex", "application/x-latex"},
{".library-ms", "application/windows-library+xml"},
{".lit", "application/x-ms-reader"},
{".loadtest", "application/xml"},
{".lpk", "application/octet-stream"},
{".lsf", "video/x-la-asf"},
{".lst", "text/plain"},
{".lsx", "video/x-la-asf"},
{".lzh", "application/octet-stream"},
{".m13", "application/x-msmediaview"},
{".m14", "application/x-msmediaview"},
{".m1v", "video/mpeg"},
{".m2t", "video/vnd.dlna.mpeg-tts"},
{".m2ts", "video/vnd.dlna.mpeg-tts"},
{".m2v", "video/mpeg"},
{".m3u", "audio/x-mpegurl"},
{".m3u8", "audio/x-mpegurl"},
{".m4a", "audio/m4a"},
{".m4b", "audio/m4b"},
{".m4p", "audio/m4p"},
{".m4r", "audio/x-m4r"},
{".m4v", "video/x-m4v"},
{".mac", "image/x-macpaint"},
{".mak", "text/plain"},
{".man", "application/x-troff-man"},
{".manifest", "application/x-ms-manifest"},
{".map", "text/plain"},
{".master", "application/xml"},
{".mda", "application/msaccess"},
{".mdb", "application/x-msaccess"},
{".mde", "application/msaccess"},
{".mdp", "application/octet-stream"},
{".me", "application/x-troff-me"},
{".mfp", "application/x-shockwave-flash"},
{".mht", "message/rfc822"},
{".mhtml", "message/rfc822"},
{".mid", "audio/mid"},
{".midi", "audio/mid"},
{".mix", "application/octet-stream"},
{".mk", "text/plain"},
{".mmf", "application/x-smaf"},
{".mno", "text/xml"},
{".mny", "application/x-msmoney"},
{".mod", "video/mpeg"},
{".mov", "video/quicktime"},
{".movie", "video/x-sgi-movie"},
{".mp2", "video/mpeg"},
{".mp2v", "video/mpeg"},
{".mp3", "audio/mpeg"},
{".mp4", "video/mp4"},
{".mp4v", "video/mp4"},
{".mpa", "video/mpeg"},
{".mpe", "video/mpeg"},
{".mpeg", "video/mpeg"},
{".mpf", "application/vnd.ms-mediapackage"},
{".mpg", "video/mpeg"},
{".mpp", "application/vnd.ms-project"},
{".mpv2", "video/mpeg"},
{".mqv", "video/quicktime"},
{".ms", "application/x-troff-ms"},
{".msi", "application/octet-stream"},
{".mso", "application/octet-stream"},
{".mts", "video/vnd.dlna.mpeg-tts"},
{".mtx", "application/xml"},
{".mvb", "application/x-msmediaview"},
{".mvc", "application/x-miva-compiled"},
{".mxp", "application/x-mmxp"},
{".nc", "application/x-netcdf"},
{".nsc", "video/x-ms-asf"},
{".nws", "message/rfc822"},
{".ocx", "application/octet-stream"},
{".oda", "application/oda"},
{".odc", "text/x-ms-odc"},
{".odh", "text/plain"},
{".odl", "text/plain"},
{".odp", "application/vnd.oasis.opendocument.presentation"},
{".ods", "application/oleobject"},
{".odt", "application/vnd.oasis.opendocument.text"},
{".one", "application/onenote"},
{".onea", "application/onenote"},
{".onepkg", "application/onenote"},
{".onetmp", "application/onenote"},
{".onetoc", "application/onenote"},
{".onetoc2", "application/onenote"},
{".orderedtest", "application/xml"},
{".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"},
{".pcast", "application/x-podcast"},
{".pct", "image/pict"},
{".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"},
{".pic", "image/pict"},
{".pict", "image/pict"},
{".pkgdef", "text/plain"},
{".pkgundef", "text/plain"},
{".pko", "application/vnd.ms-pki.pko"},
{".pls", "audio/scpls"},
{".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"},
{".pnt", "image/x-macpaint"},
{".pntg", "image/x-macpaint"},
{".pnz", "image/png"},
{".pot", "application/vnd.ms-powerpoint"},
{".potm", "application/vnd.ms-powerpoint.template.macroEnabled.12"},
{".potx", "application/vnd.openxmlformats-officedocument.presentationml.template"},
{".ppa", "application/vnd.ms-powerpoint"},
{".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"},
{".psc1", "application/PowerShell"},
{".psd", "application/octet-stream"},
{".psess", "application/xml"},
{".psm", "application/octet-stream"},
{".psp", "application/octet-stream"},
{".pub", "application/x-mspublisher"},
{".pwz", "application/vnd.ms-powerpoint"},
{".qht", "text/x-html-insertion"},
{".qhtm", "text/x-html-insertion"},
{".qt", "video/quicktime"},
{".qti", "image/x-quicktime"},
{".qtif", "image/x-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"},
{".rat", "application/rat-file"},
{".rc", "text/plain"},
{".rc2", "text/plain"},
{".rct", "text/plain"},
{".rdlc", "application/xml"},
{".resx", "application/xml"},
{".rf", "image/vnd.rn-realflash"},
{".rgb", "image/x-rgb"},
{".rgs", "text/plain"},
{".rm", "application/vnd.rn-realmedia"},
{".rmi", "audio/mid"},
{".rmp", "application/vnd.rn-rn_music_package"},
{".roff", "application/x-troff"},
{".rpm", "audio/x-pn-realaudio-plugin"},
{".rqy", "text/x-ms-rqy"},
{".rtf", "application/rtf"},
{".rtx", "text/richtext"},
{".ruleset", "application/xml"},
{".s", "text/plain"},
{".safariextz", "application/x-safari-safariextz"},
{".scd", "application/x-msschedule"},
{".sct", "text/scriptlet"},
{".sd2", "audio/x-sd2"},
{".sdp", "application/sdp"},
{".sea", "application/octet-stream"},
{".searchConnector-ms", "application/windows-search-connector+xml"},
{".setpay", "application/set-payment-initiation"},
{".setreg", "application/set-registration-initiation"},
{".settings", "application/xml"},
{".sgimb", "application/x-sgimb"},
{".sgml", "text/sgml"},
{".sh", "application/x-sh"},
{".shar", "application/x-shar"},
{".shtml", "text/html"},
{".sit", "application/x-stuffit"},
{".sitemap", "application/xml"},
{".skin", "application/xml"},
{".sldm", "application/vnd.ms-powerpoint.slide.macroEnabled.12"},
{".sldx", "application/vnd.openxmlformats-officedocument.presentationml.slide"},
{".slk", "application/vnd.ms-excel"},
{".sln", "text/plain"},
{".slupkg-ms", "application/x-ms-license"},
{".smd", "audio/x-smd"},
{".smi", "application/octet-stream"},
{".smx", "audio/x-smd"},
{".smz", "audio/x-smd"},
{".snd", "audio/basic"},
{".snippet", "application/xml"},
{".snp", "application/octet-stream"},
{".sol", "text/plain"},
{".sor", "text/plain"},
{".spc", "application/x-pkcs7-certificates"},
{".spl", "application/futuresplash"},
{".src", "application/x-wais-source"},
{".srf", "text/plain"},
{".SSISDeploymentManifest", "text/xml"},
{".ssm", "application/streamingmedia"},
{".sst", "application/vnd.ms-pki.certstore"},
{".stl", "application/vnd.ms-pki.stl"},
{".sv4cpio", "application/x-sv4cpio"},
{".sv4crc", "application/x-sv4crc"},
{".svc", "application/xml"},
{".swf", "application/x-shockwave-flash"},
{".t", "application/x-troff"},
{".tar", "application/x-tar"},
{".tcl", "application/x-tcl"},
{".testrunconfig", "application/xml"},
{".testsettings", "application/xml"},
{".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"},
{".tlh", "text/plain"},
{".tli", "text/plain"},
{".toc", "application/octet-stream"},
{".tr", "application/x-troff"},
{".trm", "application/x-msterminal"},
{".trx", "application/xml"},
{".ts", "video/vnd.dlna.mpeg-tts"},
{".tsv", "text/tab-separated-values"},
{".ttf", "application/octet-stream"},
{".tts", "video/vnd.dlna.mpeg-tts"},
{".txt", "text/plain"},
{".u32", "application/octet-stream"},
{".uls", "text/iuls"},
{".user", "text/plain"},
{".ustar", "application/x-ustar"},
{".vb", "text/plain"},
{".vbdproj", "text/plain"},
{".vbk", "video/mpeg"},
{".vbproj", "text/plain"},
{".vbs", "text/vbscript"},
{".vcf", "text/x-vcard"},
{".vcproj", "Application/xml"},
{".vcs", "text/plain"},
{".vcxproj", "Application/xml"},
{".vddproj", "text/plain"},
{".vdp", "text/plain"},
{".vdproj", "text/plain"},
{".vdx", "application/vnd.ms-visio.viewer"},
{".vml", "text/xml"},
{".vscontent", "application/xml"},
{".vsct", "text/xml"},
{".vsd", "application/vnd.visio"},
{".vsi", "application/ms-vsi"},
{".vsix", "application/vsix"},
{".vsixlangpack", "text/xml"},
{".vsixmanifest", "text/xml"},
{".vsmdi", "application/xml"},
{".vspscc", "text/plain"},
{".vss", "application/vnd.visio"},
{".vsscc", "text/plain"},
{".vssettings", "text/xml"},
{".vssscc", "text/plain"},
{".vst", "application/vnd.visio"},
{".vstemplate", "text/xml"},
{".vsto", "application/x-ms-vsto"},
{".vsw", "application/vnd.visio"},
{".vsx", "application/vnd.visio"},
{".vtx", "application/vnd.visio"},
{".wav", "audio/wav"},
{".wave", "audio/wav"},
{".wax", "audio/x-ms-wax"},
{".wbk", "application/msword"},
{".wbmp", "image/vnd.wap.wbmp"},
{".wcm", "application/vnd.ms-works"},
{".wdb", "application/vnd.ms-works"},
{".wdp", "image/vnd.ms-photo"},
{".webarchive", "application/x-safari-webarchive"},
{".webtest", "application/xml"},
{".wiq", "application/xml"},
{".wiz", "application/msword"},
{".wks", "application/vnd.ms-works"},
{".WLMP", "application/wlmoviemaker"},
{".wlpginstall", "application/x-wlpg-detect"},
{".wlpginstall3", "application/x-wlpg3-detect"},
{".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"},
{".wpl", "application/vnd.ms-wpl"},
{".wps", "application/vnd.ms-works"},
{".wri", "application/x-mswrite"},
{".wrl", "x-world/x-vrml"},
{".wrz", "x-world/x-vrml"},
{".wsc", "text/scriptlet"},
{".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"},
{".xht", "application/xhtml+xml"},
{".xhtml", "application/xhtml+xml"},
{".xla", "application/vnd.ms-excel"},
{".xlam", "application/vnd.ms-excel.addin.macroEnabled.12"},
{".xlc", "application/vnd.ms-excel"},
{".xld", "application/vnd.ms-excel"},
{".xlk", "application/vnd.ms-excel"},
{".xll", "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"},
{".xmta", "application/xml"},
{".xof", "x-world/x-vrml"},
{".XOML", "text/plain"},
{".xpm", "image/x-xpixmap"},
{".xps", "application/vnd.ms-xpsdocument"},
{".xrm-ms", "text/xml"},
{".xsc", "application/xml"},
{".xsd", "text/xml"},
{".xsf", "text/xml"},
{".xsl", "text/xml"},
{".xslt", "text/xml"},
{".xsn", "application/octet-stream"},
{".xss", "application/xml"},
{".xtp", "application/octet-stream"},
{".xwd", "image/x-xwindowdump"},
{".z", "application/x-compress"},
{".zip", "application/x-zip-compressed"},
#endregion
};
public static string GetMimeType(string extension)
{
if (extension == null)
{
throw new ArgumentNullException("extension");
}
if (!extension.StartsWith("."))
{
extension = "." + extension;
}
string mime;
return _mappings.TryGetValue(extension, out mime) ? mime : "application/octet-stream";
}
更清晰：
我已经编写了一个程序来提取answer并将其转换为以文件扩展名键控的C＃var mimeType = MimeMapping.GetMimeMapping(fileName);
。是// Summary:
// Returns the MIME mapping for the specified file name.
//
// Parameters:
// fileName:
// The file name that is used to determine the MIME type.
public static string GetMimeMapping(string fileName);
。
您可以在注册表中找到该信息。例如，.pdf文件的MIME类型可以在键here中的值“ Content Type”中找到：
[我喜欢塞缪尔·内夫（Samuel Neff）所做的工作，但不喜欢每次创建字典的想法和开销。
此处提供两种解决方案的组合：
大多数解决方案都在工作，但是为什么要花些功夫，同时我们也可以很容易地获得哑剧类型。在System.Web程序集中，有一种从文件名获取mime类型的方法。例如：