Common base class and contract for objects, which are factories that execute some queries to produce a single object or a list of objects that you can use as binding source objects.
Assembly: WindowsBase (in WindowsBase.dll)
Thetype exposes the following members.
|Data||Gets the underlying data object.|
|Dispatcher||Gets or sets the current Dispatcher object to the UI thread to use.|
|Error||Gets the error of the last query operation.|
|IsInitialLoadEnabled||Gets or sets a value that indicates whether to prevent or delay the automatic loading of data.|
|IsRefreshDeferred||Gets a value that indicates whether there is an outstanding DeferRefresh in use.|
|BeginInit||Indicates that initialization of this object is about to begin; no implicit Refresh occurs until the matched EndInit method is called.|
|BeginQuery||When overridden in a derived class, this base class calls this method when InitialLoad or Refresh has been called. The base class delays the call if refresh is deferred or initial load is disabled.|
|DeferRefresh||Enters a defer cycle that you can use to change properties of the provider and delay automatic refresh.|
|EndInit||Indicates that the initialization of this object has completed; this causes a Refresh if no other DeferRefresh is outstanding.|
|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 it is reclaimed by garbage collection. (Inherited from Object.)|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|InitialLoad||Starts the initial query to the underlying data model. The result is returned on the Data property.|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|OnPropertyChanged||Raises the PropertyChanged event with the provided arguments.|
|OnQueryFinished(Object)||Derived classes call this method to indicate that a query has finished.|
|OnQueryFinished(Object, Exception, DispatcherOperationCallback, Object)||Derived classes call this method to indicate that a query has finished.|
|Refresh||Initiates a refresh operation to the underlying data model. The result is returned on the Data property.|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
|INotifyPropertyChanged.PropertyChanged||Occurs when a property value changes.|
is a convenience wrapper around an existing data model; it does not replace any data model. A data provider does not attempt to condense the complexity and versatility of a data model such as ADO into one single object with a few properties.
is an abstract class. Use one of the derived classes, which are XmlDataProvider and ObjectDataProvider. The is aware of the Windows Presentation Foundation (WPF) threading and dispatcher model. It assumes the thread at creation time to be the UI thread. Events will get marshaled from a worker thread to the UI thread of the application.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.