Downloading file with “;” or “#” in file name ruins filename

Question

I have a file named AttachmentDownload.aspx and inside Page_Load method have such code wich offers to download file. All names work correctly in IE except names which includ

Answer 1

I started to just clean my filenames of all special characters. I've come up with a mapping table that should map most of the commonly used chars.

//http://www.pjb.com.au/comp/diacritics.html
private static string[,] CharacterReplacements = { 
    { " ", "-"},
    { "&", "-"},
    { "?", "-"},
    { "!", "-"},
    { "%", "-"},
    { "+", "-"},
    { "#", "-"},
    { ":", "-"},
    { ";", "-"},
    { ".", "-"},

    { "¢", "c" },   //cent
    { "£", "P" },   //Pound
    { "€", "E" },   //Euro
    { "¥", "Y" },   //Yen
    { "°", "d" },   //degree
    { "¼", "1-4" }, //fraction one-quarter
    { "½", "1-2" }, //fraction half    
    { "¾", "1-3" }, //fraction three-quarters}
    { "@", "AT)"}, //at                                                  
    { "Œ", "OE" },  //OE ligature, French (in ISO-8859-15)        
    { "œ", "oe" },  //OE ligature, French (in ISO-8859-15)        

    {"Å","A" },  //ring
    {"Æ","AE"},  //diphthong
    {"Ç","C" },  //cedilla
    {"È","E" },  //grave accent
    {"É","E" },  //acute accent
    {"Ê","E" },  //circumflex accent
    {"Ë","E" },  //umlaut mark
    {"Ì","I" },  //grave accent
    {"Í","I" },  //acute accent
    {"Î","I" },  //circumflex accent
    {"Ï","I" },  //umlaut mark
    {"Ð","Eth"}, //Icelandic
    {"Ñ","N" },  //tilde
    {"Ò","O" },  //grave accent
    {"Ó","O" },  //acute accent
    {"Ô","O" },  //circumflex accent
    {"Õ","O" },  //tilde
    {"Ö","O" },  //umlaut mark
    {"Ø","O" },  //slash
    {"Ù","U" },  //grave accent
    {"Ú","U" },  //acute accent
    {"Û","U" },  //circumflex accent
    {"Ü","U" },  //umlaut mark
    {"Ý","Y" },  //acute accent
    {"Þ","eth"}, //Icelandic - http://en.wikipedia.org/wiki/Thorn_(letter)
    {"ß","ss"},  //German

    {"à","a" },  //grave accent
    {"á","a" },  //acute accent
    {"â","a" },  //circumflex accent
    {"ã","a" },  //tilde
    {"ä","ae"},  //umlaut mark
    {"å","a" },  //ring
    {"æ","ae"},  //diphthong
    {"ç","c" },  //cedilla
    {"è","e" },  //grave accent
    {"é","e" },  //acute accent
    {"ê","e" },  //circumflex accent
    {"ë","e" },  //umlaut mark
    {"ì","i" },  //grave accent
    {"í","i" },  //acute accent
    {"î","i" },  //circumflex accent
    {"ï","i" },  //umlaut mark
    {"ð","eth"}, //Icelandic
    {"ñ","n" },  //tilde
    {"ò","o" },  //grave accent
    {"ó","o" },  //acute accent
    {"ô","o" },  //circumflex accent
    {"õ","o" },  //tilde
    {"ö","oe"},  //umlaut mark
    {"ø","o" },  //slash
    {"ù","u" },  //grave accent
    {"ú","u" },  //acute accent
    {"û","u" },  //circumflex accent
    {"ü","ue"},  //umlaut mark
    {"ý","y" },  //acute accent
    {"þ","eth"}, //Icelandic - http://en.wikipedia.org/wiki/Thorn_(letter)
    {"ÿ","y" },  //umlaut mark
    };

Or you can get the whole code here:

http://remy.supertext.ch/2012/08/clean-filenames/

Let me know if you find chars that are missing.