TypeCode Enumeration

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[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Specifies the type of an object.

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

Syntax

Public Enumeration TypeCode

public enum TypeCode

Members

Member name Description
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.

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.

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 displayed.

Sub WriteObjectInfo(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal testObject As Object)
   Dim typeCode As TypeCode = Type.GetTypeCode(testObject.GetType())

   Select Case typeCode
      Case typeCode.Boolean
         outputBlock.Text += String.Format("Boolean: {0}", testObject) & vbCrLf

      Case typeCode.Double
         outputBlock.Text += String.Format("Double: {0}", testObject) & vbCrLf

      Case Else
         outputBlock.Text += String.Format("{0}: {1}", typeCode.ToString(), testObject) & vbCrLf
   End Select
End Sub

static void WriteObjectInfo(System.Windows.Controls.TextBlock outputBlock, object testObject)
{
   TypeCode typeCode = Type.GetTypeCode(testObject.GetType());

   switch (typeCode)
   {
      case TypeCode.Boolean:
         outputBlock.Text += String.Format("Boolean: {0}", testObject) + "\n";
         break;

      case TypeCode.Double:
         outputBlock.Text += String.Format("Double: {0}", testObject) + "\n";
         break;

      default:
         outputBlock.Text += String.Format("{0}: {1}", typeCode.ToString(), testObject) + "\n";
         break;
   }
}

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

See Also

Reference

System Namespace