Binding Class

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Defines a binding that connects the properties of binding targets and data sources.

Inheritance Hierarchy

System::Object
System.Windows.Data::BindingBase
System.Windows.Data::Binding

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

Syntax

C++

No code example is currently available or this language may not be supported.

XAML Object Element Usage

<Binding .../>

XAML

See Remarks

The Binding type exposes the following members.

	Name	Description
	Binding()	Initializes a new instance of the Binding class.
	Binding(String)	Initializes a new instance of the Binding class with an initial property path for the data source.

	Name	Description
	BindsDirectlyToSource	Gets or sets a value that indicates whether the binding ignores any ICollectionView settings on the data source.
	Converter	Gets or sets the converter object that is called by the binding engine to modify the data as it is passed between the source and target, or vice versa.
	ConverterCulture	Gets or sets the culture to be used by the Converter.
	ConverterParameter	Gets or sets a parameter that can be used in the Converter logic.
	ElementName	Gets or sets the name of the element to use as the binding source object.
	FallbackValue	Gets or sets the value to use when the binding is unable to return a value. (Inherited from BindingBase.)
	Mode	Gets or sets a value that indicates the direction of the data flow in the binding.
	NotifyOnValidationError	Gets or sets a value that indicates whether the BindingValidationError event is raised on validation errors.
	Path	Gets or sets the path to the binding source property.
	RelativeSource	Gets or sets the binding source by specifying its location relative to the position of the binding target.
	Source	Gets or sets the data source for the binding.
	StringFormat	Gets or sets a string that specifies how to format the binding if it displays the bound value as a string. (Inherited from BindingBase.)
	TargetNullValue	Gets or sets the value that is used in the target when the value of the source is nullptr. (Inherited from BindingBase.)
	UpdateSourceTrigger	Gets or sets a value that determines the timing of binding source updates for two-way bindings.
	ValidatesOnDataErrors	Gets or sets a value that indicates whether the binding engine will report validation errors from an IDataErrorInfo implementation on the bound data entity.
	ValidatesOnExceptions	Gets or sets a value that indicates whether the binding engine will report exception validation errors.
	ValidatesOnNotifyDataErrors	Gets or sets a value that indicates whether the binding engine will report validation errors from an INotifyDataErrorInfo implementation on the bound data entity.

	Name	Description
	CheckSealed	Throws an exception if the binding has already been attached to a binding target. (Inherited from BindingBase.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

Explicit Interface Implementations

	Name	Description
	ISupportInitialize::BeginInit	Signals the object that initialization is starting.
	ISupportInitialize::EndInit	Signals the object that initialization is complete.

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Remarks

The Binding markup extension enables you to specify a Binding value as a single attribute string, including setting Binding properties such as Path and Source.

A Binding object connects a dependency property of a FrameworkElement directly to a data object so that updates to the data object are automatically propagated to the property. The Binding class defines the properties of a binding. Each binding must have a target element, target property, and data source, although some values are provided by default if you do not specify them.

To bind to a property or a subproperty on a data object, set the Path property of the Binding object.

You can apply an instance of a Binding class to multiple targets. However, you cannot modify the property values of a Binding object after you attach it to a target element.

Note:
Calling the FrameworkElement::SetBinding method and passing in a new Binding object will not necessarily remove an existing binding. Instead, you should use the DependencyObject::ClearValue method.