TypeCode TypeCode TypeCode Enum

Definition

Specifies the type of an object.

public enum class TypeCode
[System.Runtime.InteropServices.ComVisible(true)]
public enum TypeCode
Public Enum TypeCode
Inheritance
Attributes

Fields

Boolean Boolean Boolean 3

A simple type representing Boolean values of true or false.

Byte Byte Byte 6

An integral type representing unsigned 8-bit integers with values between 0 and 255.

Char Char Char 4

An integral type representing unsigned 16-bit integers with values between 0 and 65535. The set of possible values for the Char type corresponds to the Unicode character set.

DateTime DateTime DateTime 16

A type representing a date and time value.

DBNull DBNull DBNull 2

A database null (column) value.

Decimal Decimal Decimal 15

A simple type representing values ranging from 1.0 x 10 -28 to approximately 7.9 x 10 28 with 28-29 significant digits.

Double Double Double 14

A floating point type representing values ranging from approximately 5.0 x 10 -324 to 1.7 x 10 308 with a precision of 15-16 digits.

Empty Empty Empty 0

A null reference.

Int16 Int16 Int16 7

An integral type representing signed 16-bit integers with values between -32768 and 32767.

Int32 Int32 Int32 9

An integral type representing signed 32-bit integers with values between -2147483648 and 2147483647.

Int64 Int64 Int64 11

An integral type representing signed 64-bit integers with values between -9223372036854775808 and 9223372036854775807.

Object Object Object 1

A general type representing any reference or value type not explicitly represented by another TypeCode.

SByte SByte SByte 5

An integral type representing signed 8-bit integers with values between -128 and 127.

Single Single Single 13

A floating point type representing values ranging from approximately 1.5 x 10 -45 to 3.4 x 10 38 with a precision of 7 digits.

String String String 18

A sealed class type representing Unicode character strings.

UInt16 UInt16 UInt16 8

An integral type representing unsigned 16-bit integers with values between 0 and 65535.

UInt32 UInt32 UInt32 10

An integral type representing unsigned 32-bit integers with values between 0 and 4294967295.

UInt64 UInt64 UInt64 12

An integral type representing unsigned 64-bit integers with values between 0 and 18446744073709551615.

Examples

The following code example demonstrates how the TypeCode enumeration can be used. In a decision block inside the WriteObjectInfo method, the TypeCode of an Object parameter is examined, and an appropriate message is written to the console.

void WriteObjectInfo( Object^ testObject )
{
   TypeCode typeCode = Type::GetTypeCode( testObject->GetType() );
   switch ( typeCode )
   {
      case TypeCode::Boolean:
         Console::WriteLine( "Boolean: {0}", testObject );
         break;

      case TypeCode::Double:
         Console::WriteLine( "Double: {0}", testObject );
         break;

      default:
         Console::WriteLine( "{0}: {1}", typeCode, testObject );
         break;
   }
}
static void WriteObjectInfo(object testObject)
{
    TypeCode    typeCode = Type.GetTypeCode( testObject.GetType() );

    switch( typeCode )
    {
        case TypeCode.Boolean:
            Console.WriteLine("Boolean: {0}", testObject);
            break;

        case TypeCode.Double:
            Console.WriteLine("Double: {0}", testObject);
            break;

        default:
            Console.WriteLine("{0}: {1}", typeCode.ToString(), testObject);
            break;
    }
}
Sub WriteObjectInfo(ByVal testObject As Object)
    Dim typeCode As TypeCode = Type.GetTypeCode(testObject.GetType())

    Select Case typeCode
        Case typeCode.Boolean
            Console.WriteLine("Boolean: {0}", testObject)

        Case typeCode.Double
            Console.WriteLine("Double: {0}", testObject)

        Case Else
            Console.WriteLine("{0}: {1}", typeCode.ToString(), testObject)
    End Select
End Sub

Remarks

Call the GetTypeCode method on classes that implement the IConvertible interface to obtain the type code for an instance of that class.

Otherwise, call an object's GetType method to obtain its Type object, then call the Type object's GetTypeCode method to obtain the object's type code.

Applies to