CanEvaluate Method (ValidationCriterion)

Returns a boolean value indicating whether the validation expression can be evaluated.

Syntax

Visual Basic
C#

'Declaration
 
Public Overrides Function CanEvaluate( _

   ByVal componentToValidate As Object _

) As Boolean

'Usage
 
Dim instance As ValidationCriterion

Dim componentToValidate As Object

Dim value As Boolean

 

value = instance.CanEvaluate(componentToValidate)

public override bool CanEvaluate( 

   object componentToValidate

)

Parameters

componentToValidate: The object to perform the evaluation on.

Return Value

Returns true if the validation expression is well formatted and has all required operands and operators to be evaluated on the passed input System.ComponentModel.Component; false otherwise.

Remarks

When overriding this method in a derived class, be sure to call the base class's method before your own code so that the base class's criteria can be evaluated first.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

ValidationCriterion Class
ValidationCriterion Members
Base Implementation in CanEvaluate