'Declaration
 
Public MustOverride Function Evaluate( _
   ByVal validationProvider As ValidationProvider, _
   ByVal componentToValidate As Object, _
   ByVal valueToValidate As String, _
   ByRef validationMessage As String _
) As Boolean

'Usage
 
Dim instance As ValidationExpression
Dim validationProvider As ValidationProvider
Dim componentToValidate As Object
Dim valueToValidate As String
Dim validationMessage As String
Dim value As Boolean
 
value = instance.Evaluate(validationProvider, componentToValidate, valueToValidate, validationMessage)

public abstract bool Evaluate( 
   ValidationProvider validationProvider,
   object componentToValidate,
   string valueToValidate,
   out string validationMessage
)

Parameters

validationProvider

The validation provider used for the validation.

componentToValidate

The input component containing the text value to be used for the validation.

valueToValidate

Text value to be validated.

validationMessage

A reference to a string representing the last error message of the validation failure, if any.

Return Value

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

ValidationExpression Class
ValidationExpression Members