Static Methods of System.Char

The System.Char class has a large number of static methods that serve as utility methods for getting information about individual characters.
Here are some examples:


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
char c1 = '2';
double d1 = char.GetNumericValue(c1);   // Convert '2' to 2.0
 
UnicodeCategory cat = char.GetUnicodeCategory('a');     // LowercaseLetter
cat = char.GetUnicodeCategory('+');     // MathSymbol
cat = char.GetUnicodeCategory('6');     // DecimalDigitNumber
 
// Check for control characters
bool isCtrl = char.IsControl('a');      // false
isCtrl = char.IsControl('\t');          // true
 
// Check for digits
bool isDigit = char.IsDigit('a');       // false
isDigit = char.IsDigit('3');            // true
 
// Check for letters
bool isLetter = char.IsLetter('%');     // false
isLetter = char.IsLetter('P');          // true
isLetter = char.IsLetter('ǽ');          // true
 
bool lord = char.IsLetterOrDigit('j');  // true
 
// Check for lower/upper case
bool low = char.IsLower('j');           // true
low = char.IsLower('Y');                // false
bool upper = char.IsUpper('Ǻ');         // true
 
// Check for numbers
bool isnum = char.IsNumber('4');        // true
isnum = char.IsNumber('௧');             // true
isnum = char.IsNumber('X');             // false
 
// Other
bool ispunc = char.IsPunctuation('?');  // true
bool issep = char.IsSeparator(' ');     // true
bool issymbol = char.IsSymbol('$');     // true
 
// Unicode
bool issur = char.IsSurrogate('\xd840');         // true
bool islow = char.IsLowSurrogate('\xd840');    // false
bool ishigh = char.IsHighSurrogate('\xd840');  // true
 
// Conversion
char upp = char.ToUpper('a');       // A
char lower = char.ToLower('a');     // a
lower = char.ToLower('Y');          // y
Be a Fan
Labels: