学用 ASP.Net 之 System.Char 结构 成员: /* 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 GetNumericValue(): 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); } ConvertFromUtf32()、ConvertToUtf32(): 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); } GetUnicodeCategory(): 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 Control 132 Control 133 Control 134 Control 135 Control 136 Control 137 Control 138 Control 139 Control 140 Control 141 Control 142 Control 143 Control 144 Control 145 Control 146 Control 147 Control 148 Control 149 Control 150 Control 151 Control 152 Control 153 Control 154 Control 155 Control 156 Control 157 Control 158 Control 159 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 */