BindingBase.TargetNullValue Property

Definition

Namespace:

System.Windows.Data

Assembly:

PresentationFramework.dll

Gets or sets the value that is used in the target when the value of the source is null.

public:
 property System::Object ^ TargetNullValue { System::Object ^ get(); void set(System::Object ^ value); };

public object TargetNullValue { get; set; }

member this.TargetNullValue : obj with get, set

Public Property TargetNullValue As Object

Property Value

Object

The value that is used in the target when the value of the source is null.

Examples

The following example binds a TextBox to a property of an object. If the property is null, the TextBox displays "please enter a string."

<TextBox Width="150"
         Text="{Binding Source={StaticResource object2}, 
  Path=PropertyB, BindingGroupName=bindingGroup, 
  TargetNullValue=please enter a string}" />

Remarks

XAML Text Usage

<object TargetNullValue="nullValue" />  

- or -

<object>  
  <object.TargetNullValue>  
    nullValue  
    </object.TargetNullValue>  
</object>  

XAML Values

nullValue
An attribute or object element value of the same type as the target property. See that type's documentation for XAML usage information. That type may or may not support attribute syntax for its values, or may or may not support object element syntax (which requires a parameterless constructor on that type).