ASP.NET 根据后缀获取ContentType类型

       花了几天时间去研究了一下邮件管理系统，在C#下基于一个免费的JMAIL 4.4这个DLL。为什么不选JMail.net 1.1的？JMail.net 1.1发邮件很不错，但是他没有POP3，所以收不了邮件。说说我遇到一个问题，在发附件的时候，关于ContetnType类型之间的选择问题。来做一个测试例子，代码如下：

 

1、在C盘建一个ContentType.txt文件

?

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

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

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

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

 

2、在C#里做的测试，loadDicContentType和getContentType

?

class Program

{

    static void Main(string[] args)

    {

 

        loadDicContentType();

        Console.WriteLine(getContentTypeValue("class"));

        Console.ReadLine();

    }

 

    static Dictionary<string, string> dicContentType = new Dictionary<string, string>();

    static void loadDicContentType()

    {

        string[] contentTypes = File.ReadAllLines(@"c:\contentType.txt");

        foreach (string contentType in contentTypes)

        {

            string[] types = contentType.Split(',');

            string key = types[0];

            string value = types[1];

            dicContentType.Add(key, value);

        }

    }

 

    static string getContentTypeValue(string key)

    {

        string value = dicContentType[key];

        return value;

    }

}