Object Collection Validator

Class Name: ObjectCollectionValidator

Attribute Name: ObjectCollectionValidatorAttribute

Configuration tool name: Object Collection Validator

Description

This validator checks that the object is a collection of the given type and then invokes validation on each element of the collection. If the object you want to validate is null, the validation is ignored. If the object you want to validate is not a collection, then the validation fails and the rule set is not applied. If there are elements in the collection that are of a different type then the one you specified for the object, then the validation for these elements fails but this does not affect validation for the other elements.

Properties

The following table lists the Object Collection Validator properties.

Object Collection Validator

Examples

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

Attributes

The following code example checks that each part in a kit's part list meets the requirements of the Part type's validator. The Part type's validator checks that the name is fewer than 20 characters and that the manufacturer's 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 Kit
{
   [ObjectCollectionValidator(typeof(Part)]
   public Part[] PartList
   {
      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 Kit
    <ObjectCollectionValidator(GetType(Part))> _
    ReadOnly Property PartList(ByVal _partList As String)
        Get
            Return _partList
        End Get
    End Property
' ...
End Class