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TypeCode Enumeration

 

Specifies the type of an object.

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

<SerializableAttribute>
<ComVisibleAttribute(True)>
Public Enumeration TypeCode

Member nameDescription
Boolean

A simple type representing Boolean values of true or false.

Byte

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

Char

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

A type representing a date and time value.

DBNull

A database null (column) value.

Decimal

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

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

A null reference.

Int16

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

Int32

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

Int64

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

Object

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

SByte

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

Single

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

A sealed class type representing Unicode character strings.

UInt16

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

UInt32

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

UInt64

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

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.

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.

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

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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