Or Composite Validator

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Class Name: OrCompositeValidator

Attribute Name: ValidatorCompositionAttribute

Configuration tool name: Or Composite Validator

Description

This validator creates a composite validator. Validation requires that at least one of the validators that make up the composite validator be True. For example, you can use the Or Composite Validator to require that the Not Null Validator OR the Date Time Range Validator be True.

Properties

The following table lists the Or Composite Validator properties.

Property	Description
MessageTemplate	This property is a string containing template tokens that the validator replaces with values as it validates the target. Typically, it describes the validation result.
MessageTemplateResourceName	If you do not want to use the MessageTemplate property to hard-code a message template (perhaps for internationalization), you can use a template stored in the application resources. You must also specify a MessageTemplateResourceTypeName value. If you include both a MessageTemplate value and a MessageTemeplateResourceName value, the MessageTemplate value takes precedence.
MessageTemplateResourceTypeName	The resource type for the template you want to use. If you specify a MessageTemplateResourceName value, you must specify this value.
Tag	This property is a user-supplied string. Typically, it is used to sort or categorize validation results.

Example

The following example shows how to use the validators with attributes. The validator combines a NotNullValidator and a StringLengthValidator.

public class Product
{
  [ValidatorComposition(CompositionType.Or)]
  [NotNullValidator]
  [StringLengthValidator(10)]
  public string ProductCode
  {
    get
    {
      return _productCode;
    }
  }
  // ...
}

'Usage
Public Class Product
  <ValidatorComposition(CompositionType.Or)> _
  <NotNullValidator()> _
  <StringLengthValidator(10)> _
  ReadOnly Property ProductCode(ByVal _productCode As String)
    Get
      Return _productCode
    End Get
  End Property
  ' ...
End Class