Interaction.IIf Method (Boolean, Object, Object)

 

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

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

Public Shared Function IIf (
	Expression As Boolean,
	TruePart As Object,
	FalsePart As Object
) As Object

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.

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.

.NET Framework
Available since 1.1
Silverlight
Available since 2.0
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