Binding.ValidatesOnExceptions Property

July 28, 2014

Gets or sets a value that indicates whether the binding engine will report exception validation errors.

Namespace:  System.Windows.Data
Assembly:  System.Windows (in System.Windows.dll)
XMLNS for XAML: Not mapped to an xmlns.

'Declaration
Public Property ValidatesOnExceptions As Boolean
<Binding ValidatesOnExceptions="bool"/>

Property Value

Type: System.Boolean
true if the binding engine will report exception validation errors; otherwise, false. The default is false.

ExceptionCondition
InvalidOperationException

The Binding has already been attached to a target element, and cannot be modified.

Setting ValidatesOnExceptions to true tells the binding engine to catch exceptions that occur when updating the source object from the target in TwoWay bindings. The exceptions can occur in two ways:

1. Thrown from the source object's setter function.

2. Thrown by the type converter.

In order to receive notification that these exceptions have occurred, you must set the NotifyOnValidationError property to be true.

If this property is set to false, the application will silently fail on validation exceptions.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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