Export (0) Print
Expand All

Interaction.IIf Method

Returns one of two objects, depending on the evaluation of an expression.

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

'Declaration
Public Shared Function IIf ( _
	Expression As Boolean, _
	TruePart As Object, _
	FalsePart As Object _
) As Object
'Usage
Dim Expression As Boolean 
Dim TruePart As Object 
Dim FalsePart As Object 
Dim returnValue As Object 

returnValue = Interaction.IIf(Expression, _
	TruePart, FalsePart)

Parameters

Expression
Type: System.Boolean

Required. Boolean. The expression you want to evaluate.

TruePart
Type: System.Object

Required. Object. Returned if Expression evaluates to True.

FalsePart
Type: System.Object

Required. Object. Returned if Expression evaluates to False.

Return Value

Type: System.Object
Returns one of two objects, depending on the evaluation of an expression.

For more detailed information, see the Visual Basic topic IIf Function.

The IIf function provides a counterpart for the ternary Conditional Operator: ? : in Visual C++.

This example uses the IIf function to evaluate the testMe parameter of the checkIt procedure and returns the word "Large" if the amount is greater than 1000; otherwise, it returns the word "Small".

Function checkIt(ByVal testMe As Integer) As String 
    Return CStr(IIf(testMe > 1000, "Large", "Small"))
End Function

Note that if Option Strict is On, you must use the CStr keyword to explicitly convert the return from Object to String.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

Community Additions

ADD
Show:
© 2014 Microsoft