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TypeCode Enumeration

April 12, 2014

Specifies the type of an object.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
public enum TypeCode
Member nameDescription
BooleanA simple type representing Boolean values of true or false.
ByteAn integral type representing unsigned 8-bit integers with values between 0 and 255.
CharAn 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.
DateTimeA type representing a date and time value.
DBNullA database null (column) value.
DecimalA simple type representing values ranging from 1.0 x 10 -28 to approximately 7.9 x 10 28 with 28-29 significant digits.
DoubleA 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.
EmptyA null reference.
Int16An integral type representing signed 16-bit integers with values between -32768 and 32767.
Int32An integral type representing signed 32-bit integers with values between -2147483648 and 2147483647.
Int64An integral type representing signed 64-bit integers with values between -9223372036854775808 and 9223372036854775807.
ObjectA general type representing any reference or value type not explicitly represented by another TypeCode.
SByteAn integral type representing signed 8-bit integers with values between -128 and 127.
SingleA 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.
StringA sealed class type representing Unicode character strings.
UInt16An integral type representing unsigned 16-bit integers with values between 0 and 65535.
UInt32An integral type representing unsigned 32-bit integers with values between 0 and 4294967295.
UInt64An 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 displayed.


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;
   }
}


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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