ContextItemManager Class

Maintains a set of context items.

Inheritance Hierarchy

System.Object
  Microsoft.Windows.Design.ContextItemManager

Namespace:  Microsoft.Windows.Design
Assembly:  Microsoft.Windows.Design.Extensibility (in Microsoft.Windows.Design.Extensibility.dll)

Syntax

'Declaration
Public MustInherit Class ContextItemManager _
    Implements IEnumerable(Of ContextItem), IEnumerable

public abstract class ContextItemManager : IEnumerable<ContextItem>, 
    IEnumerable

public ref class ContextItemManager abstract : IEnumerable<ContextItem^>, 
    IEnumerable

[<AbstractClass>]
type ContextItemManager =  
    class
        interface IEnumerable<ContextItem>
        interface IEnumerable
    end

public abstract class ContextItemManager implements IEnumerable<ContextItem>, IEnumerable

The ContextItemManager type exposes the following members.

Constructors

	Name	Description
	ContextItemManager	Initializes a new instance of the ContextItemManager class.

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Methods

	Name	Description
	Contains(Type)	When overridden in a derived class, returns a value indicating whether the context item manager contains an item of the specified type.
	Contains<TItemType>()	Returns a value indicating whether the context item manager contains an item of the specified type.
	Equals	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 it is reclaimed by garbage collection. (Inherited from Object.)
	GetEnumerator	When overridden in a derived class, gets an enumeration of context items in the editing context.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetTarget	A utility method that returns the target object for a delegate.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValue(Type)	When overridden in a derived class, returns an instance of the requested item type.
	GetValue<TItemType>()	Returns an instance of the requested item type.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	NotifyItemChanged	Invokes the protected OnItemChanged method on the specified ContextItem.
	RemoveCallback	A helper method that performs a Delegate.Remove, but knows how to unwrap delegates that are proxies to generic callbacks.
	SetValue	When overridden in a derived class, sets a context item to the specified value.
	Subscribe(Type, SubscribeContextCallback)	When overridden in a derived class, adds a callback that is invoked when a context item of the specified item type changes.
	Subscribe<TContextItemType>(SubscribeContextCallback<TContextItemType>)	Adds a callback that is invoked when a context item of the specified item type changes.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Unsubscribe(Type, SubscribeContextCallback)	When overridden in a derived class, removes a subscription.
	Unsubscribe<TContextItemType>(SubscribeContextCallback<TContextItemType>)	Removes a subscription.

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Explicit Interface Implementations

	Name	Description
	IEnumerable.GetEnumerator	For a description of this member, see IEnumerable.GetEnumerator.

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Remarks

The ContextItemManager class maintains a set of context items. A context item represents a transient piece of state in a designer.

Create a ContextItemManager by calling the CreateContextItemManager method on EditingContext.

Use the Subscribe method to subscribe to change notifications on context items.

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

Reference

Microsoft.Windows.Design Namespace

ContextItem

SubscribeContextCallback<TContextItemType>

ServiceManager

FeatureManager

Other Resources

Editing Context Architecture

Understanding WPF Designer Extensibility