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Char::IsControl Method (Char)

Indicates whether the specified Unicode character is categorized as a control character.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public:
static bool IsControl(
	wchar_t c
)

Parameters

c
Type: System::Char

A Unicode character.

Return Value

Type: System::Boolean
true if c is a control character; otherwise, false.

Control characters are non-printing and formatting characters, such as ACK, BEL, CR, FF, LF, and VT. The Unicode standard assigns the following code units to control characters: from \U0000 to \U001F, \U007F, and from \U0080 to \U009F. According to the Unicode standard, these values are to be interpreted as control characters unless their use is otherwise defined by an application. Valid control characters are members of the UnicodeCategory::Control category.

The following example lists the Unicode code unit of each of the control characters.

using namespace System;

void main()
{
   int charsWritten = 0;

   for (int ctr = 0x00; ctr <= 0xFFFF; ctr++)
   {
      wchar_t ch = ctr;
      if (Char::IsControl(ch))
      {
         Console::Write(L"\U{0:X4}    ", ctr);
         charsWritten++;
         if (charsWritten % 6 == 0)
            Console::WriteLine();
      }     
   }  
}
// The example displays the following output: 
//       U0000    U0001    U0002    U0003    U0004    U0005 
//       U0006    U0007    U0008    U0009    U000A    U000B 
//       U000C    U000D    U000E    U000F    U0010    U0011 
//       U0012    U0013    U0014    U0015    U0016    U0017 
//       U0018    U0019    U001A    U001B    U001C    U001D 
//       U001E    U001F    U007F    U0080    U0081    U0082 
//       U0083    U0084    U0085    U0086    U0087    U0088 
//       U0089    U008A    U008B    U008C    U008D    U008E 
//       U008F    U0090    U0091    U0092    U0093    U0094 
//       U0095    U0096    U0097    U0098    U0099    U009A 
//       U009B    U009C    U009D    U009E    U009F

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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