Dispatcher Class

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

Provides services for managing the queue of work items for a thread.

Inheritance Hierarchy


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


<CLSCompliantAttribute(True)> _
Public NotInheritable Class Dispatcher
public sealed class Dispatcher

The Dispatcher type exposes the following members.


Name Description
BeginInvoke(Action) Executes the specified delegate asynchronously on the thread the Dispatcher is associated with.
BeginInvoke(Delegate, array<Object>[]()[]) Executes the specified delegate asynchronously with the specified array of arguments on the thread the Dispatcher is associated with.
CheckAccess Determines whether the calling thread is the thread associated with this Dispatcher.
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.)



The Dispatcher class currently provides support only for running code on the user interface (UI) thread from a non-UI thread. For example, you could update the UI after the device camera finishes capturing a photo. For more information about this scenario, see How to create a base camera app for Windows Phone 8.

You can access the Dispatcher object for the UI thread through the DependencyObject..::.Dispatcher properties. These are instance methods, but instances of these types are frequently inaccessible from non-UI threads.

You can call the CheckAccess method to determine whether the caller is on the UI thread. If the caller is not on the UI thread, you can call BeginInvoke to run the specified delegate on the UI thread.

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0


Windows Phone

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also


System.Windows.Threading Namespace