ContentType的一些值

string extension; 
extension = extension.ToUpper(); 
string contentType;

if(extension == "*") 
 contentType = "application/octet-stream"; 
else if(extension == "323") 
 contentType = "text/h323"; 
else if(extension == "ACX") 
 contentType = "application/internet-property-stream"; 
else if(extension == "AI") 
 contentType = "application/postscript"; 
else if(extension == "AIF") 
 contentType = "audio/x-aiff"; 
else if(extension == "AIFC") 
 contentType = "audio/x-aiff"; 
else if(extension == "AIFF") 
 contentType = "audio/x-aiff"; 
else if(extension == "ASF") 
 contentType = "video/x-ms-asf"; 
else if(extension == "SR") 
 contentType = "video/x-ms-asf"; 
else if(extension == "SX") 
 contentType = "video/x-ms-asf"; 
else if(extension == "AU") 
 contentType = "audio/basic"; 
else if(extension == "AVI") 
 contentType = "video/x-msvideo"; 
else if(extension == "AXS") 
 contentType = "application/olescript"; 
else if(extension == "BAS") 
 contentType = "text/plain"; 
else if(extension == "BCPIO") 
 contentType = "application/x-bcpio"; 
else if(extension == "BIN") 
 contentType = "application/octet-stream"; 
else if(extension == "BMP") 
 contentType = "image/bmp"; 
else if(extension == "C") 
 contentType = "text/plain"; 
else if(extension == "CAT") 
 contentType = "application/vnd.ms-pkiseccat"; 
else if(extension == "CDF") 
 contentType = "application/x-cdf"; 
else if(extension == "CER") 
 contentType = "application/x-x509-ca-cert"; 
else if(extension == "CLASS") 
 contentType = "application/octet-stream"; 
else if(extension == "CLP") 
 contentType = "application/x-msclip"; 
else if(extension == "CMX") 
 contentType = "image/x-cmx"; 
else if(extension == "COD") 
 contentType = "image/cis-cod"; 
else if(extension == "CPIO") 
 contentType = "application/x-cpio"; 
else if(extension == "CRD") 
 contentType = "application/x-mscardfile"; 
else if(extension == "CRL") 
 contentType = "application/pkix-crl"; 
else if(extension == "CRT") 
 contentType = "application/x-x509-ca-cert"; 
else if(extension == "CSH") 
 contentType = "application/x-csh"; 
else if(extension == "CSS") 
 contentType = "text/css"; 
else if(extension == "DCR") 
 contentType = "application/x-director"; 
else if(extension == "DER") 
 contentType = "application/x-x509-ca-cert"; 
else if(extension == "DIR") 
 contentType = "application/x-director"; 
else if(extension == "DLL") 
 contentType = "application/x-msdownload"; 
else if(extension == "DMS") 
 contentType = "application/octet-stream"; 
else if(extension == "DOC") 
 contentType = "application/msword"; 
else if(extension == "DOT") 
 contentType = "application/msword"; 
else if(extension == "DVI") 
 contentType = "application/x-dvi"; 
else if(extension == "DXR") 
 contentType = "application/x-director"; 
else if(extension == "EPS") 
 contentType = "application/postscript"; 
else if(extension == "ETX") 
 contentType = "text/x-setext"; 
else if(extension == "EVY") 
 contentType = "application/envoy"; 
else if(extension == "EXE") 
 contentType = "application/octet-stream"; 
else if(extension == "FIF") 
 contentType = "application/fractals"; 
else if(extension == "FLR") 
 contentType = "x-world/x-vrml"; 
else if(extension == "GIF") 
 contentType = "image/gif"; 
else if(extension == "GTAR") 
 contentType = "application/x-gtar"; 
else if(extension == "GZ") 
 contentType = "application/x-gzip"; 
else if(extension == "H") 
 contentType = "text/plain"; 
else if(extension == "HDF") 
 contentType = "application/x-hdf"; 
else if(extension == "HLP") 
 contentType = "application/winhlp"; 
else if(extension == "HQX") 
 contentType = "application/mac-binhex40"; 
else if(extension == "HTA") 
 contentType = "application/hta"; 
else if(extension == "HTC") 
 contentType = "text/x-component"; 
else if(extension == "HTM") 
 contentType = "text/html"; 
else if(extension == "HTML") 
 contentType = "text/html"; 
else if(extension == "HTT") 
 contentType = "text/webviewhtml"; 
else if(extension == "ICO") 
 contentType = "image/x-icon"; 
else if(extension == "IEF") 
 contentType = "image/ief"; 
else if(extension == "III") 
 contentType = "application/x-iphone"; 
else if(extension == "INS") 
 contentType = "application/x-internet-signup"; 
else if(extension == "ISP") 
 contentType = "application/x-internet-signup"; 
else if(extension == "JFIF") 
 contentType = "image/pipeg"; 
else if(extension == "JPE") 
 contentType = "image/jpeg"; 
else if(extension == "JPEG") 
 contentType = "image/jpeg"; 
else if(extension == "ZIP") 
 contentType = "application/x-zip-compressed"; 
else if(extension == "RAR") 
 contentType = "application/octet-stream";

感谢网络的力量