Csharp/C Sharp by API/System/Char
Содержание
Char.IsControl
<source lang="csharp"> using System; using System.Data; using System.Text.RegularExpressions; using System.Text; class Class1{
static void Main(string[] args){ Console.WriteLine(GetCharKind("f")); Console.WriteLine(GetCharKind("0")); Console.WriteLine(GetCharKind(".")); Console.WriteLine(GetCharKind("}")); } public static String GetCharKind(char theChar) { if (Char.IsControl(theChar)) { return "Control"; } else if (Char.IsDigit(theChar)) { return "Digit"; } else if (Char.IsLetter(theChar)) { return "Letter"; } else if (Char.IsNumber(theChar)) { return "Number"; } else if (Char.IsPunctuation(theChar)) { return "Punctuation"; } else if (Char.IsSeparator(theChar)) { return "Separator"; } else if (Char.IsSurrogate(theChar)) { return "Surrogate"; } else if (Char.IsSymbol(theChar)) { return "Symbol"; } else if (Char.IsWhiteSpace(theChar)) { return "Whitespace"; } else { return "Unknown"; } }
}
</source>
Char.IsDigit
<source lang="csharp"> using System;
public class CharDemo {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsDigit(str[i])) Console.Write(" digit"); if(Char.IsLetter(str[i])) Console.Write(" letter"); if(Char.IsLower(str[i])) Console.Write(" lowercase"); if(Char.IsUpper(str[i])) Console.Write(" uppercase"); if(Char.IsSymbol(str[i])) Console.Write(" symbol"); if(Char.IsSeparator(str[i])) Console.Write(" separator"); if(Char.IsWhiteSpace(str[i])) Console.Write(" whitespace"); if(Char.IsPunctuation(str[i])) Console.Write(" punctuation"); Console.WriteLine(); } Console.WriteLine("Original: " + str); // Convert to upper case. string newstr = ""; for(i=0; i < str.Length; i++) newstr += Char.ToUpper(str[i]); Console.WriteLine("Uppercased: " + newstr); }
}
</source>
Char.IsLetter
<source lang="csharp"> using System;
class MainClass {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsLetter(str[i])) Console.Write(" letter"); Console.WriteLine(); } }
}
</source>
Char.IsLower
<source lang="csharp">
using System;
class MainClass {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsLower(str[i])) Console.Write(" lowercase"); if(Char.IsUpper(str[i])) Console.Write(" uppercase"); Console.WriteLine(); } }
}
</source>
Char.IsPunctuation
<source lang="csharp"> using System;
class MainClass {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsPunctuation(str[i])) Console.Write(" punctuation"); Console.WriteLine(); } }
}
</source>
Char.IsSeparator
<source lang="csharp">
using System;
class MainClass {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsSeparator(str[i])) Console.Write(" separator"); Console.WriteLine(); } }
}
</source>
Char.IsSymbol
<source lang="csharp"> using System;
class MainClass {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsSymbol(str[i])) Console.Write(" symbol"); Console.WriteLine(); } }
}
</source>
Char.IsUpper
<source lang="csharp"> using System;
class MainClass {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsLower(str[i])) Console.Write(" lowercase"); if(Char.IsUpper(str[i])) Console.Write(" uppercase"); Console.WriteLine(); } }
}
</source>
Char.IsWhiteSpace
<source lang="csharp"> using System;
class MainClass {
public static void Main() { string str = "This is a test. $23"; int i; for(i=0; i < str.Length; i++) { Console.Write(str[i] + " is"); if(Char.IsWhiteSpace(str[i])) Console.Write(" whitespace"); Console.WriteLine(); } }
}
</source>
Char.MaxValue
<source lang="csharp">
using System; class Test {
public static void Main() { // First, print out the minimum values Console.WriteLine("System Minimums\n"); Console.WriteLine( "MinSByte {0}", System.SByte.MinValue); Console.WriteLine( "MinByte {0}", System.Byte.MinValue); Console.WriteLine( "MinInt16 {0}", System.Int16.MinValue); Console.WriteLine( "MinUInt16 {0}", System.UInt16.MinValue); Console.WriteLine( "MinInt32 {0}", System.Int32.MinValue); Console.WriteLine( "MinUInt32 {0}", System.UInt32.MinValue); Console.WriteLine( "MinInt64 {0}", System.Int64.MinValue); Console.WriteLine( "MinUInt64 {0}", System.UInt64.MinValue); Console.WriteLine( "MinChar {0}", System.Char.MinValue); Console.WriteLine( "MinSingle {0}", System.Single.MinValue); Console.WriteLine( "MinDouble {0}", System.Double.MinValue); // Console.WriteLine( "MinBoolean {0}", System.Boolean.MinValue); Console.WriteLine( "MinDecimal {0}", System.Decimal.MinValue); Console.WriteLine("\nSystem Maximums\n"); Console.WriteLine( "MaxSByte {0}", System.SByte.MaxValue); Console.WriteLine( "MaxByte {0}", System.Byte.MaxValue); Console.WriteLine( "MaxInt16 {0}", System.Int16.MaxValue); Console.WriteLine( "MaxUInt16 {0}", System.UInt16.MaxValue); Console.WriteLine( "MaxInt32 {0}", System.Int32.MaxValue); Console.WriteLine( "MaxUInt32 {0}", System.UInt32.MaxValue); Console.WriteLine( "MaxInt64 {0}", System.Int64.MaxValue); Console.WriteLine( "MaxUInt64 {0}", System.UInt64.MaxValue); Console.WriteLine( "MaxChar {0}", System.Char.MaxValue); Console.WriteLine( "MaxSingle {0}", System.Single.MaxValue); Console.WriteLine( "MaxDouble {0}", System.Double.MaxValue); Console.WriteLine( "MaxDecimal {0}", System.Decimal.MaxValue); }
}
</source>
Char.MinValue
<source lang="csharp">
using System; class Test {
public static void Main() { // First, print out the minimum values Console.WriteLine("System Minimums\n"); Console.WriteLine( "MinSByte {0}", System.SByte.MinValue); Console.WriteLine( "MinByte {0}", System.Byte.MinValue); Console.WriteLine( "MinInt16 {0}", System.Int16.MinValue); Console.WriteLine( "MinUInt16 {0}", System.UInt16.MinValue); Console.WriteLine( "MinInt32 {0}", System.Int32.MinValue); Console.WriteLine( "MinUInt32 {0}", System.UInt32.MinValue); Console.WriteLine( "MinInt64 {0}", System.Int64.MinValue); Console.WriteLine( "MinUInt64 {0}", System.UInt64.MinValue); Console.WriteLine( "MinChar {0}", System.Char.MinValue); Console.WriteLine( "MinSingle {0}", System.Single.MinValue); Console.WriteLine( "MinDouble {0}", System.Double.MinValue); // Console.WriteLine( "MinBoolean {0}", System.Boolean.MinValue); Console.WriteLine( "MinDecimal {0}", System.Decimal.MinValue); Console.WriteLine("\nSystem Maximums\n"); Console.WriteLine( "MaxSByte {0}", System.SByte.MaxValue); Console.WriteLine( "MaxByte {0}", System.Byte.MaxValue); Console.WriteLine( "MaxInt16 {0}", System.Int16.MaxValue); Console.WriteLine( "MaxUInt16 {0}", System.UInt16.MaxValue); Console.WriteLine( "MaxInt32 {0}", System.Int32.MaxValue); Console.WriteLine( "MaxUInt32 {0}", System.UInt32.MaxValue); Console.WriteLine( "MaxInt64 {0}", System.Int64.MaxValue); Console.WriteLine( "MaxUInt64 {0}", System.UInt64.MaxValue); Console.WriteLine( "MaxChar {0}", System.Char.MaxValue); Console.WriteLine( "MaxSingle {0}", System.Single.MaxValue); Console.WriteLine( "MaxDouble {0}", System.Double.MaxValue); Console.WriteLine( "MaxDecimal {0}", System.Decimal.MaxValue); }
}
</source>
Char.Parse(String value)
<source lang="csharp"> using System; class MainClass {
public static void Main(string[] args) { char myChar = char.Parse("w"); Console.WriteLine("-> Value of myChar: {0}\n", myChar); }
}
</source>
Char.ToUpper
<source lang="csharp"> using System; using System.Data; using System.Text.RegularExpressions; using System.Text; class Class1{
static void Main(string[] args){ Console.WriteLine(IsInRangeCaseInsensitive("c", "a", "G")); Console.WriteLine(IsInRangeCaseInsensitive("c", "a", "c")); Console.WriteLine(IsInRangeCaseInsensitive("c", "g", "g")); Console.WriteLine(IsInRangeCaseInsensitive((char)32, "a", "b")); } public static bool IsInRangeCaseInsensitive(char testChar, char startOfRange, char endOfRange) { testChar = char.ToUpper(testChar); startOfRange = char.ToUpper(startOfRange); endOfRange = char.ToUpper(endOfRange); if (testChar >= startOfRange && testChar <= endOfRange) { // testChar is within the range return (true); } else { // testChar is NOT within the range return (false); } }
}
</source>