.NET获取文件的MIME类型(Content Type)
获取文件的MIME类型有很多方法，闲话少絮，直接进入主题，下面是使用C#获取文件的MIME类型（Content Type）的各种方法。
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。
MIME TYPE:|
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// 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 =
@"mimetype.txt"
;
string
contentType = MimeMapping.GetMimeMapping(file);
Console.WriteLine(
"{0}'s MIME TYPE:{1}"
, file, contentType);
// Console output:
/*
mimetype.txt's Mime Type: text/plain
*/
|
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：
application/octet-stream
第二种：直接在系统中通过文件的后缀获取文件的Content Type
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// 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。
第三种： 自己动手写代码，将MimeType写成Mapping类，需要的时候直接使用。
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// 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);
// ~~~~
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