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FrameworkElement.GetBindingExpression Method

Retrieves the BindingExpression for a dependency property where a binding is established.

Namespace:  System.Windows
Assembly:  System.Windows (in System.Windows.dll)

public BindingExpression GetBindingExpression(
	DependencyProperty dp
)

Parameters

dp
Type: System.Windows.DependencyProperty
The dependency property identifier for the specific property on this FrameworkElement where you want to obtain the BindingExpression.

Return Value

Type: System.Windows.Data.BindingExpression
A BindingExpression for the binding, if the local value represented a data-bound value. May return null if the property is not a data-bound value.

In the current implementation, this method returns the same result as ReadLocalValue, with the return value cast to BindingExpression.

You could potentially use GetBindingExpression as a test to see whether a given dependency property has a binding applied to it, by attempting the cast of the return value to BindingExpression. If this succeeds, the property is currently being set by a data-bound value. If the value is null rather than a BindingExpression, then the property you queried is not data-bound.

A BindingExpression object enables the following scenarios with its API:

For more information, see BindingExpression or Data Binding.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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