Xceed Grid for WinForms v4.3 Documentation
Xceed.Validation.v1.3 Assembly / Xceed.Validation Namespace / ValidationExpression Class / Evaluate Method
The validation provider used for the validation.
The input component containing the text value to be used for the validation.
Text value to be validated.
A reference to a string representing the last error message of the validation failure, if any.


In This Topic
    Evaluate Method (ValidationExpression)
    In This Topic
    Launches the validation on the component.
    Syntax
    '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)

    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

    true if the component contains valid information based on this validation expression; false otherwise.
    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

    See Also