Information.VarType Method

Returns an Integer value containing the data type classification of a variable.

Namespace:  Microsoft.VisualBasic
Assembly:  Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

public static VariantType VarType(
	Object VarName
)

Parameters

VarName
Type: System.Object

Required. Object variable. If Option Strict is Off, you can pass a variable of any data type except a structure.

Return Value

Type: Microsoft.VisualBasic.VariantType
Returns an Integer value containing the data type classification of a variable.

The integer value returned by VarType is a member of the VariantType.

The following table shows the values returned by VarType for special cases of VarName.

Data type represented by VarName

Value returned by VarType

Nothing (Visual Basic)

VariantType.Object

DBNull

VariantType.Null

Enumeration

Underlying data type (SByte, Byte, Short, UShort, Integer, UInteger, Long, or ULong)

Array

Bitwise OR of array element type and VariantType.Array

Array of arrays

Bitwise OR of VariantType.Object and VariantType.Array

Structure (System.ValueType)

VariantType.UserDefinedType

Exception

VariantType.Error

Unknown

VariantType.Object

The following example uses the VarType function to return data type classification information about several variables.

Dim testString As String = "String for testing" 
Dim testObject As New Object 
Dim testNumber, testArray(5) As Integer 
Dim testVarType As VariantType
testVarType = VarType(testVarType)
' Returns VariantType.Integer.
testVarType = VarType(testString)
' Returns VariantType.String.
testVarType = VarType(testObject)
' Returns VariantType.Object.
testVarType = VarType(testNumber)
' Returns VariantType.Integer.
testVarType = VarType(testArray)
' Returns the bitwise OR of VariantType.Array and VariantType.Integer.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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