Я разработал класс Microsoft System.Net.WebUtility из .NET 4.0, используя Reflector (я думаю, что они будут в порядке с учетом обстоятельств). Таким образом, вы можете использовать .NET 4.0 Client Framework (который теперь имеет этот новый класс) или использовать код здесь.
Пока вы используете строгое имя в сборке и т. Д., Вы будете в безопасности. Здесь:
/// <summary>
/// Taken from System.Net in 4.0, useful until we move to .NET 4.0 - needed for Client Profile
/// </summary>
public static class WebUtility
{
// Fields
private static char[] _htmlEntityEndingChars = new char[] { ';', '&' };
// Methods
public static string HtmlDecode(string value)
{
if (string.IsNullOrEmpty(value))
{
return value;
}
if (value.IndexOf('&') < 0)
{
return value;
}
StringWriter output = new StringWriter(CultureInfo.InvariantCulture);
HtmlDecode(value, output);
return output.ToString();
}
public static void HtmlDecode(string value, TextWriter output)
{
if (value != null)
{
if (output == null)
{
throw new ArgumentNullException("output");
}
if (value.IndexOf('&') < 0)
{
output.Write(value);
}
else
{
int length = value.Length;
for (int i = 0; i < length; i++)
{
char ch = value[i];
if (ch == '&')
{
int num3 = value.IndexOfAny(_htmlEntityEndingChars, i + 1);
if ((num3 > 0) && (value[num3] == ';'))
{
string entity = value.Substring(i + 1, (num3 - i) - 1);
if ((entity.Length > 1) && (entity[0] == '#'))
{
ushort num4;
if ((entity[1] == 'x') || (entity[1] == 'X'))
{
ushort.TryParse(entity.Substring(2), NumberStyles.AllowHexSpecifier, (IFormatProvider)NumberFormatInfo.InvariantInfo, out num4);
}
else
{
ushort.TryParse(entity.Substring(1), NumberStyles.Integer, (IFormatProvider)NumberFormatInfo.InvariantInfo, out num4);
}
if (num4 != 0)
{
ch = (char)num4;
i = num3;
}
}
else
{
i = num3;
char ch2 = HtmlEntities.Lookup(entity);
if (ch2 != '\0')
{
ch = ch2;
}
else
{
output.Write('&');
output.Write(entity);
output.Write(';');
goto Label_0117;
}
}
}
}
output.Write(ch);
Label_0117: ;
}
}
}
}
public static string HtmlEncode(string value)
{
if (string.IsNullOrEmpty(value))
{
return value;
}
if (IndexOfHtmlEncodingChars(value, 0) == -1)
{
return value;
}
StringWriter output = new StringWriter(CultureInfo.InvariantCulture);
HtmlEncode(value, output);
return output.ToString();
}
public static unsafe void HtmlEncode(string value, TextWriter output)
{
if (value != null)
{
if (output == null)
{
throw new ArgumentNullException("output");
}
int num = IndexOfHtmlEncodingChars(value, 0);
if (num == -1)
{
output.Write(value);
}
else
{
int num2 = value.Length - num;
fixed (char* str = value)
{
char* chPtr = str;
char* chPtr2 = chPtr;
while (num-- > 0)
{
chPtr2++;
output.Write(chPtr2[0]);
}
while (num2-- > 0)
{
chPtr2++;
char ch = chPtr2[0];
if (ch <= '>')
{
switch (ch)
{
case '&':
{
output.Write("&");
continue;
}
case '\'':
{
output.Write("'");
continue;
}
case '"':
{
output.Write(""");
continue;
}
case '<':
{
output.Write("<");
continue;
}
case '>':
{
output.Write(">");
continue;
}
}
output.Write(ch);
continue;
}
if ((ch >= '\x00a0') && (ch < 'Ā'))
{
output.Write("&#");
output.Write(((int)ch).ToString(NumberFormatInfo.InvariantInfo));
output.Write(';');
}
else
{
output.Write(ch);
}
}
}
}
}
}
private static unsafe int IndexOfHtmlEncodingChars(string s, int startPos)
{
int num = s.Length - startPos;
fixed (char* str = s)
{
char* chPtr = str;
char* chPtr2 = chPtr + startPos;
while (num > 0)
{
char ch = chPtr2[0];
if (ch <= '>')
{
switch (ch)
{
case '&':
case '\'':
case '"':
case '<':
case '>':
return (s.Length - num);
case '=':
goto Label_0086;
}
}
else if ((ch >= '\x00a0') && (ch < 'Ā'))
{
return (s.Length - num);
}
Label_0086:
chPtr2++;
num--;
}
}
return -1;
}
// Nested Types
private static class HtmlEntities
{
// Fields
private static string[] _entitiesList = new string[] {
"\"-quot", "&-amp", "'-apos", "<-lt", ">-gt", "\x00a0-nbsp", "\x00a1-iexcl", "\x00a2-cent", "\x00a3-pound", "\x00a4-curren", "\x00a5-yen", "\x00a6-brvbar", "\x00a7-sect", "\x00a8-uml", "\x00a9-copy", "\x00aa-ordf",
"\x00ab-laquo", "\x00ac-not", "\x00ad-shy", "\x00ae-reg", "\x00af-macr", "\x00b0-deg", "\x00b1-plusmn", "\x00b2-sup2", "\x00b3-sup3", "\x00b4-acute", "\x00b5-micro", "\x00b6-para", "\x00b7-middot", "\x00b8-cedil", "\x00b9-sup1", "\x00ba-ordm",
"\x00bb-raquo", "\x00bc-frac14", "\x00bd-frac12", "\x00be-frac34", "\x00bf-iquest", "\x00c0-Agrave", "\x00c1-Aacute", "\x00c2-Acirc", "\x00c3-Atilde", "\x00c4-Auml", "\x00c5-Aring", "\x00c6-AElig", "\x00c7-Ccedil", "\x00c8-Egrave", "\x00c9-Eacute", "\x00ca-Ecirc",
"\x00cb-Euml", "\x00cc-Igrave", "\x00cd-Iacute", "\x00ce-Icirc", "\x00cf-Iuml", "\x00d0-ETH", "\x00d1-Ntilde", "\x00d2-Ograve", "\x00d3-Oacute", "\x00d4-Ocirc", "\x00d5-Otilde", "\x00d6-Ouml", "\x00d7-times", "\x00d8-Oslash", "\x00d9-Ugrave", "\x00da-Uacute",
"\x00db-Ucirc", "\x00dc-Uuml", "\x00dd-Yacute", "\x00de-THORN", "\x00df-szlig", "\x00e0-agrave", "\x00e1-aacute", "\x00e2-acirc", "\x00e3-atilde", "\x00e4-auml", "\x00e5-aring", "\x00e6-aelig", "\x00e7-ccedil", "\x00e8-egrave", "\x00e9-eacute", "\x00ea-ecirc",
"\x00eb-euml", "\x00ec-igrave", "\x00ed-iacute", "\x00ee-icirc", "\x00ef-iuml", "\x00f0-eth", "\x00f1-ntilde", "\x00f2-ograve", "\x00f3-oacute", "\x00f4-ocirc", "\x00f5-otilde", "\x00f6-ouml", "\x00f7-divide", "\x00f8-oslash", "\x00f9-ugrave", "\x00fa-uacute",
"\x00fb-ucirc", "\x00fc-uuml", "\x00fd-yacute", "\x00fe-thorn", "\x00ff-yuml", "Œ-OElig", "œ-oelig", "Š-Scaron", "š-scaron", "Ÿ-Yuml", "ƒ-fnof", "ˆ-circ", "˜-tilde", "Α-Alpha", "Β-Beta", "Γ-Gamma",
"Δ-Delta", "Ε-Epsilon", "Ζ-Zeta", "Η-Eta", "Θ-Theta", "Ι-Iota", "Κ-Kappa", "Λ-Lambda", "Μ-Mu", "Ν-Nu", "Ξ-Xi", "Ο-Omicron", "Π-Pi", "Ρ-Rho", "Σ-Sigma", "Τ-Tau",
"Υ-Upsilon", "Φ-Phi", "Χ-Chi", "Ψ-Psi", "Ω-Omega", "α-alpha", "β-beta", "γ-gamma", "δ-delta", "ε-epsilon", "ζ-zeta", "η-eta", "θ-theta", "ι-iota", "κ-kappa", "λ-lambda",
"μ-mu", "ν-nu", "ξ-xi", "ο-omicron", "π-pi", "ρ-rho", "ς-sigmaf", "σ-sigma", "τ-tau", "υ-upsilon", "φ-phi", "χ-chi", "ψ-psi", "ω-omega", "ϑ-thetasym", "ϒ-upsih",
"ϖ-piv", " -ensp", " -emsp", " -thinsp", "-zwnj", "-zwj", "-lrm", "-rlm", "–-ndash", "—-mdash", "‘-lsquo", "’-rsquo", "‚-sbquo", "“-ldquo", "”-rdquo", "„-bdquo",
"†-dagger", "‡-Dagger", "•-bull", "…-hellip", "‰-permil", "′-prime", "″-Prime", "‹-lsaquo", "›-rsaquo", "‾-oline", "⁄-frasl", "€-euro", "ℑ-image", "℘-weierp", "ℜ-real", "™-trade",
"ℵ-alefsym", "←-larr", "↑-uarr", "→-rarr", "↓-darr", "↔-harr", "↵-crarr", "⇐-lArr", "⇑-uArr", "⇒-rArr", "⇓-dArr", "⇔-hArr", "∀-forall", "∂-part", "∃-exist", "∅-empty",
"∇-nabla", "∈-isin", "∉-notin", "∋-ni", "∏-prod", "∑-sum", "−-minus", "∗-lowast", "√-radic", "∝-prop", "∞-infin", "∠-ang", "∧-and", "∨-or", "∩-cap", "∪-cup",
"∫-int", "∴-there4", "∼-sim", "≅-cong", "≈-asymp", "≠-ne", "≡-equiv", "≤-le", "≥-ge", "⊂-sub", "⊃-sup", "⊄-nsub", "⊆-sube", "⊇-supe", "⊕-oplus", "⊗-otimes",
"⊥-perp", "⋅-sdot", "⌈-lceil", "⌉-rceil", "⌊-lfloor", "⌋-rfloor", "〈-lang", "〉-rang", "◊-loz", "♠-spades", "♣-clubs", "♥-hearts", "♦-diams"
};
private static Dictionary<string, char> _lookupTable = GenerateLookupTable();
// Methods
private static Dictionary<string, char> GenerateLookupTable()
{
Dictionary<string, char> dictionary = new Dictionary<string, char>(StringComparer.Ordinal);
foreach (string str in _entitiesList)
{
dictionary.Add(str.Substring(2), str[0]);
}
return dictionary;
}
public static char Lookup(string entity)
{
char ch;
_lookupTable.TryGetValue(entity, out ch);
return ch;
}
}
}