MultiBinding.ValidationRules Property

Definition

Namespace:

System.Windows.Data

Assembly:

PresentationFramework.dll

Gets the collection of ValidationRule objects for this instance of MultiBinding.

public:
 property System::Collections::ObjectModel::Collection<System::Windows::Controls::ValidationRule ^> ^ ValidationRules { System::Collections::ObjectModel::Collection<System::Windows::Controls::ValidationRule ^> ^ get(); };

public System.Collections.ObjectModel.Collection<System.Windows.Controls.ValidationRule> ValidationRules { get; }

member this.ValidationRules : System.Collections.ObjectModel.Collection<System.Windows.Controls.ValidationRule>

Public ReadOnly Property ValidationRules As Collection(Of ValidationRule)

Property Value

Collection<ValidationRule>

The collection of ValidationRule objects for this instance of MultiBinding.

Remarks

You can set validation rules on both the MultiBinding object and the individual Binding objects in the MultiBinding object. The binding engine evaluates the ValidationRules on the MultiBinding object when a value moves from the binding target property to the IMultiValueConverter object. After that, when a value moves from the converter to the binding source property of an individual binding, the binding engine evaluates the ValidationRules on that Binding object.

For more information about the validation process and how to provide visual feedback upon invalidation, see "Data Validation" in Data Binding Overview.

Note

This property can be set in Extensible Application Markup Language (XAML) only by using the syntax shown, or by accessing the collection object and using its various methods, such as Add. The property used to access the collection object is read-only, whereas the collection itself is read-write.

XAML Property Element Usage

<object>  
  <object.ValidationRules>  
    oneOrMoreValidationRules  
  </object.ValidationRules>  
</object>  

XAML Values

oneOrMoreValidationRules
One or more ValidationRule objects. You can use the ExceptionValidationRule class or create your custom rules by subclassing the ValidationRule class.

See also

• Binding Validation Sample