Object Validator

Class Name: ObjectValidator

Attribute Name: ObjectValidatorAttribute

Configuration tool name: Object Validator

Description

This validator causes validation to occur on an object reference. All validators defined for the object's type will be invoked, just as if the Validation.Validate method had been called on the object. If the object you want to validate is null, the validation is ignored. If the reference is to an instance of a type that is not compatible with the configured target's type then the validation fails. This validator is helpful for validating tree-structured data.

Properties

The following table lists the Object Validator properties.

Object Validator Properties

Examples

The following examples show how to use the validator with attributes and with code.

Attributes

The following code example checks that the Part object that is returned by the OrderedPart property meets the requirements of the Part class' validator. The Part class' validator checks that the name is fewer than 20 characters and that the manufacturer URL is well formed according to a particular regular expression pattern.

public class Part
{
   [StringLengthValidator(20)]
   string name;
   [RegexValidator("http://(www\.)?([^\.]+)\.com")]
   string manufacturerUrl;
   // ...
}
public class OrderLineItem
{
   [NotNullValidator]
   [ObjectValidator]
   public Part OrderedPart
   {
      get
      {
         return partList;
      }
   }
  // ...
}

'Usage
Public Class Part
    <StringLengthValidator(20)> _
    Dim name As String
    <RegexValidator("http://(www\.)?([^\.]+)\.com")> _
    Dim manufacturerUrl As String
    ' ...
End Class
Public Class OrderLineItem
    <NotNullValidator()> _
    <ObjectValidator()> _
    ReadOnly Property OrderedPart(ByVal partList As String)
        Get
            Return partList
        End Get
    End Property
' ...
End Class