VB.NET Language in a Nutshell, Second Edition

Name

TypeName Function

Class

Microsoft.VisualBasic.Information

Syntax

TypeName(varname)

varname (required; String literal)

Name of a variable

Return Value

String

Description

Returns a string giving data type information about varname. The possible return values are:

String returned	Variable contents
Boolean	8-bit True or False value type
Byte	8-bit binary value type
Char	16-bit character value type
Date	64-bit date and time value type
DBNull	Reference type indicating missing or nonexistent data
Decimal	96-bit fixed point numeric value type
Double	64-bit floating point numeric value type
Error	Error object
Integer	32-bit integer value type
Long	64-bit integer value type
Nothing	Object variable with no object currently assigned to it, uninitialized string, or undimensioned array
Object	Reference type pointing to an unspecialized object
Short	16-bit integer value type
Single	32-bit floating point numeric value type
String	Reference type pointing to a string of 16-bit characters
<objectclass>	Reference type pointing to a specialized object created from class < objectclass >
<structure>	A variable created from a structure or user-defined type named structure
<typename>( )	Dimensioned array

Rules at a Glance

• If varname is declared as type Object, it returns the data subtype that has been assigned to it.

• varname returns the data type name of all value types. It returns Nothing for uninitialized reference types and the data ...