学用 ASP.Net 之 System.Char 结构

成员:

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/* 字段 */

MaxValue //65535

MinValue //0



/* 静态方法 */

Char.ConvertFromUtf32()   //转 Unicode 值到字符串

Char.ConvertToUtf32()     //转到 Unicode 值

Char.Equals()             //=

Char.GetNumericValue()    //数字字符转换成相应的值, 返回类型是 Double

Char.GetUnicodeCategory() //获取字符类别

Char.IsControl()          //?控制字符

Char.IsDigit()            //?十进制数字(0..9)

Char.IsHighSurrogate()    //?高代理项码位(U+D800...U+DBFF)

Char.IsLetter()           //?字母

Char.IsLetterOrDigit()    //?字母或十进制数字?

Char.IsLower()            //?小写字母(a..z 等)

Char.IsLowSurrogate()     //?低代理项码位(U+DC00...U+DFFF)

Char.IsNumber()           //?数字(0..9 等)

Char.IsPunctuation()      //?标点符号?

Char.IsSeparator()        //?分隔符(空格等)

Char.IsSurrogate()        //?代理项码位

Char.IsSurrogatePair()    //判断两个 Char 对象是否形成代理项对

Char.IsSymbol()           //?符号($ + = < > ^ ` | 等)

Char.IsUpper()            //?大写字母(A..Z 等)

Char.IsWhiteSpace()       //?空白

Char.Parse()              //转换单字符的 String 到 Char

Char.ToLower()            //转小写

Char.ToLowerInvariant()   //转小写, 使用区域性规则

Char.ToString()           //

Char.ToUpper()            //转大写

Char.ToUpperInvariant()   //转大写, 使用区域性规则

Char.TryParse()           //尝试转换单字符的 String 到 Char



/* 对象方法 */

CompareTo() //对比, 返回表示距离的整数

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GetNumericValue():

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protected void Button1_Click(object sender, EventArgs e)

{

    double f1 = char.GetNumericValue('9');       // 9

    double f2 = char.GetNumericValue('A');       //-1

    double f3 = char.GetNumericValue('万');      //-1



    double f4 = char.GetNumericValue("A1B2", 3); // 2



    TextBox1.Text = string.Concat(f1, "\n", f2, "\n", f3, "\n", f4);

}

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ConvertFromUtf32()、ConvertToUtf32():

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protected void Button1_Click(object sender, EventArgs e)

{

    string s1 = char.ConvertFromUtf32(65);     //A

    string s2 = char.ConvertFromUtf32(0x4e07); //万



    int n1 = char.ConvertToUtf32("ABC", 1);    //66

    int n2 = char.ConvertToUtf32("万", 0);     //19975



    TextBox1.Text = string.Concat(s1, "\n", s2, "\n", n1, "\n", n2);

}

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GetUnicodeCategory():

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protected void Button1_Click(object sender, EventArgs e)

{

    char c;

    string str = "";

    for (int i = 20; i < 256; i++)

    {

        c = Convert.ToChar(i);

        str += string.Format("{0}\t{1}\t{2}\n", i, c, char.GetUnicodeCategory(c));

    }

    TextBox1.Text = str;

}



/* 测试结果:

20		Control

21		Control

22		Control

23		Control

24		Control

25		Control

26		Control

27		Control

28		Control

29		Control

30		Control

31		Control

32	 	SpaceSeparator

33	!	OtherPunctuation

34	"	OtherPunctuation

35	#	OtherPunctuation

36	$	CurrencySymbol

37	%	OtherPunctuation

38	&	OtherPunctuation

39	'	OtherPunctuation

40	(	OpenPunctuation

41	)	ClosePunctuation

42	*	OtherPunctuation

43	+	MathSymbol

44	,	OtherPunctuation

45	-	DashPunctuation

46	.	OtherPunctuation

47	/	OtherPunctuation

48	0	DecimalDigitNumber

49	1	DecimalDigitNumber

50	2	DecimalDigitNumber

51	3	DecimalDigitNumber

52	4	DecimalDigitNumber

53	5	DecimalDigitNumber

54	6	DecimalDigitNumber

55	7	DecimalDigitNumber

56	8	DecimalDigitNumber

57	9	DecimalDigitNumber

58	:	OtherPunctuation

59	;	OtherPunctuation

60	<	MathSymbol

61	=	MathSymbol

62	>	MathSymbol

63	?	OtherPunctuation

64	@	OtherPunctuation

65	A	UppercaseLetter

66	B	UppercaseLetter

67	C	UppercaseLetter

68	D	UppercaseLetter

69	E	UppercaseLetter

70	F	UppercaseLetter

71	G	UppercaseLetter

72	H	UppercaseLetter

73	I	UppercaseLetter

74	J	UppercaseLetter

75	K	UppercaseLetter

76	L	UppercaseLetter

77	M	UppercaseLetter

78	N	UppercaseLetter

79	O	UppercaseLetter

80	P	UppercaseLetter

81	Q	UppercaseLetter

82	R	UppercaseLetter

83	S	UppercaseLetter

84	T	UppercaseLetter

85	U	UppercaseLetter

86	V	UppercaseLetter

87	W	UppercaseLetter

88	X	UppercaseLetter

89	Y	UppercaseLetter

90	Z	UppercaseLetter

91	[	OpenPunctuation

92	\	OtherPunctuation

93	]	ClosePunctuation

94	^	ModifierSymbol

95	_	ConnectorPunctuation

96	`	ModifierSymbol

97	a	LowercaseLetter

98	b	LowercaseLetter

99	c	LowercaseLetter

100	d	LowercaseLetter

101	e	LowercaseLetter

102	f	LowercaseLetter

103	g	LowercaseLetter

104	h	LowercaseLetter

105	i	LowercaseLetter

106	j	LowercaseLetter

107	k	LowercaseLetter

108	l	LowercaseLetter

109	m	LowercaseLetter

110	n	LowercaseLetter

111	o	LowercaseLetter

112	p	LowercaseLetter

113	q	LowercaseLetter

114	r	LowercaseLetter

115	s	LowercaseLetter

116	t	LowercaseLetter

117	u	LowercaseLetter

118	v	LowercaseLetter

119	w	LowercaseLetter

120	x	LowercaseLetter

121	y	LowercaseLetter

122	z	LowercaseLetter

123	{	OpenPunctuation

124	|	MathSymbol

125	}	ClosePunctuation

126	~	MathSymbol

127		Control

128	€	Control

129		Control

130	‚	Control

131	ƒ	Control

132	„	Control

133	…	Control

134	†	Control

135	‡	Control

136	ˆ	Control

137	‰	Control

138	Š	Control

139	‹	Control

140	Œ	Control

141		Control

142	Ž	Control

143		Control

144		Control

145	‘	Control

146	’	Control

147	“	Control

148	”	Control

149	•	Control

150	–	Control

151	—	Control

152	˜	Control

153	™	Control

154	š	Control

155	›	Control

156	œ	Control

157		Control

158	ž	Control

159	Ÿ	Control

160	 	SpaceSeparator

161	¡	OtherPunctuation

162	¢	CurrencySymbol

163	£	CurrencySymbol

164	¤	CurrencySymbol

165	¥	CurrencySymbol

166	¦	OtherSymbol

167	§	OtherSymbol

168	¨	ModifierSymbol

169	©	OtherSymbol

170	ª	LowercaseLetter

171	«	InitialQuotePunctuation

172	¬	MathSymbol

173	­	DashPunctuation

174	®	OtherSymbol

175	¯	ModifierSymbol

176	°	OtherSymbol

177	±	MathSymbol

178	²	OtherNumber

179	³	OtherNumber

180	´	ModifierSymbol

181	µ	LowercaseLetter

182	¶	OtherSymbol

183	·	OtherPunctuation

184	¸	ModifierSymbol

185	¹	OtherNumber

186	º	LowercaseLetter

187	»	FinalQuotePunctuation

188	¼	OtherNumber

189	½	OtherNumber

190	¾	OtherNumber

191	¿	OtherPunctuation

192	À	UppercaseLetter

193	Á	UppercaseLetter

194	Â	UppercaseLetter

195	Ã	UppercaseLetter

196	Ä	UppercaseLetter

197	Å	UppercaseLetter

198	Æ	UppercaseLetter

199	Ç	UppercaseLetter

200	È	UppercaseLetter

201	É	UppercaseLetter

202	Ê	UppercaseLetter

203	Ë	UppercaseLetter

204	Ì	UppercaseLetter

205	Í	UppercaseLetter

206	Î	UppercaseLetter

207	Ï	UppercaseLetter

208	Ð	UppercaseLetter

209	Ñ	UppercaseLetter

210	Ò	UppercaseLetter

211	Ó	UppercaseLetter

212	Ô	UppercaseLetter

213	Õ	UppercaseLetter

214	Ö	UppercaseLetter

215	×	MathSymbol

216	Ø	UppercaseLetter

217	Ù	UppercaseLetter

218	Ú	UppercaseLetter

219	Û	UppercaseLetter

220	Ü	UppercaseLetter

221	Ý	UppercaseLetter

222	Þ	UppercaseLetter

223	ß	LowercaseLetter

224	à	LowercaseLetter

225	á	LowercaseLetter

226	â	LowercaseLetter

227	ã	LowercaseLetter

228	ä	LowercaseLetter

229	å	LowercaseLetter

230	æ	LowercaseLetter

231	ç	LowercaseLetter

232	è	LowercaseLetter

233	é	LowercaseLetter

234	ê	LowercaseLetter

235	ë	LowercaseLetter

236	ì	LowercaseLetter

237	í	LowercaseLetter

238	î	LowercaseLetter

239	ï	LowercaseLetter

240	ð	LowercaseLetter

241	ñ	LowercaseLetter

242	ò	LowercaseLetter

243	ó	LowercaseLetter

244	ô	LowercaseLetter

245	õ	LowercaseLetter

246	ö	LowercaseLetter

247	÷	MathSymbol

248	ø	LowercaseLetter

249	ù	LowercaseLetter

250	ú	LowercaseLetter

251	û	LowercaseLetter

252	ü	LowercaseLetter

253	ý	LowercaseLetter

254	þ	LowercaseLetter

255	ÿ	LowercaseLetter

*/

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