Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / System / Windows / Documents / PageContentAsyncResult.cs / 1 / PageContentAsyncResult.cs
//---------------------------------------------------------------------------- //// Copyright (C) 2004 by Microsoft Corporation. All rights reserved. // // // Description: // Implements the PageContentAsyncResult // // History: // 02/25/2004 - Zhenbin Xu (ZhenbinX) - Created. // // //--------------------------------------------------------------------------- namespace System.Windows.Documents { using System; using System.Diagnostics; using System.IO; using System.Windows.Threading; using System.Threading; using MS.Internal; using MS.Internal.AppModel; using MS.Internal.Utility; using MS.Internal.Navigation; using MS.Utility; using System.Reflection; using System.Windows.Controls; using System.Windows.Markup; using System.Net; using System.IO.Packaging; ////// IAsyncResult for GetPageAsync. This item is passed around and queued up during various /// phase of async call. /// internal sealed class PageContentAsyncResult : IAsyncResult { //------------------------------------------------------------------- // // Internal enum // //--------------------------------------------------------------------- internal enum GetPageStatus { Loading, Cancelled, Finished } //-------------------------------------------------------------------- // // Ctor // //--------------------------------------------------------------------- #region Ctor internal PageContentAsyncResult(AsyncCallback callback, object state, Dispatcher dispatcher, Uri baseUri, Uri source, FixedPage child) { this._dispatcher = dispatcher; this._isCompleted = false; this._completedSynchronously = false; this._callback = callback; this._asyncState = state; this._getpageStatus = GetPageStatus.Loading; this._child = child; this._baseUri = baseUri; Debug.Assert(source == null || source.IsAbsoluteUri); this._source = source; } #endregion Ctor //-------------------------------------------------------------------- // // Public Methods // //---------------------------------------------------------------------- //------------------------------------------------------------------- // // Public Properties // //---------------------------------------------------------------------- #region IAsyncResult //--------------------------------------------------------------------- ////// Gets a user-defined object that contains information about /// this GetPageAsync call /// public object AsyncState { get { return _asyncState; } } //--------------------------------------------------------------------- ////// Gets a WaitHandle that is used to wait for the asynchrounus /// GetPageAsync to complete. We are not providing WaitHandle /// since this can be called on the main UIThread. /// public WaitHandle AsyncWaitHandle { get { Debug.Assert(false); return null; } } //--------------------------------------------------------------------- ////// Gets an indication of whether the asynchronous GetPage /// completed synchronously. /// public bool CompletedSynchronously { get { return _completedSynchronously; } } //---------------------------------------------------------------------- ////// Gets an indication whether the asynchronous GetPage has finished /// public bool IsCompleted { get { return _isCompleted; } } #endregion IAsyncResult //------------------------------------------------------------------- // // Internal Methods // //---------------------------------------------------------------------- #region DispatcherOperationCallback //---------------------------------------------------------------------- internal object Dispatch(object arg) { if (this._exception != null) { // force finish if there was any exception this._getpageStatus = GetPageStatus.Finished; } switch (this._getpageStatus) { case GetPageStatus.Loading: try { if (this._child != null) { this._completedSynchronously = true; this._result = this._child; _getpageStatus = GetPageStatus.Finished; goto case GetPageStatus.Finished; } // // Note if _source == null, exception will // be thrown. // Stream responseStream = null; object o = null; WebResponse response = WpfWebRequestHelper.CreateRequestAndGetResponse(this._source); responseStream = response.GetResponseStream(); ParserContext pc = new ParserContext(); pc.BaseUri = this._source; XpsValidatingLoader loader = new XpsValidatingLoader(); o = loader.Load(responseStream, _baseUri, pc, new ContentType(response.ContentType)); if (o == null) { throw new ApplicationException(SR.Get(SRID.PageContentUnsupportedMimeType)); } _result = o as FixedPage; if (_result == null) { throw new ApplicationException(SR.Get(SRID.PageContentUnsupportedPageType, o.GetType())); } if (_result.IsInitialized) { responseStream.Close(); } else { _pendingStream = responseStream; _result.Initialized += new EventHandler(_OnPaserFinished); } _getpageStatus = GetPageStatus.Finished; } catch (ApplicationException e) { this._exception = e; } goto case GetPageStatus.Finished; case GetPageStatus.Cancelled: // do nothing goto case GetPageStatus.Finished; case GetPageStatus.Finished: _isCompleted = true; if (_callback != null) { _callback(this); } break; } return null; } #endregion DispatcherOperationCallback //----------------------------------------------------------------- internal void Cancel() { _getpageStatus = GetPageStatus.Cancelled; // } internal void Wait() { _dispatcherOperation.Wait(); } //-------------------------------------------------------------------- // // Internal Properties // //--------------------------------------------------------------------- #region Internal Properties //--------------------------------------------------------------------- internal Exception Exception { get { return _exception; } } //----------------------------------------------------------------- internal bool IsCancelled { get { return _getpageStatus == GetPageStatus.Cancelled; } } internal DispatcherOperation DispatcherOperation { set { _dispatcherOperation = value; } } //------------------------------------------------------------------ internal FixedPage Result { get { return _result; } } #endregion Internal Properties //------------------------------------------------------------------- // // Private Methods // //---------------------------------------------------------------------- #region Private Methods private void _OnPaserFinished(object sender, EventArgs args) { if (_pendingStream != null) { _pendingStream.Close(); _pendingStream = null; } } #endregion Private Methods //-------------------------------------------------------------------- // // Private Fields // //--------------------------------------------------------------------- #region Private private object _asyncState; private bool _isCompleted; private bool _completedSynchronously; private AsyncCallback _callback; private Exception _exception; private GetPageStatus _getpageStatus; private Uri _baseUri; private Uri _source; private FixedPage _child; private Dispatcher _dispatcher; private FixedPage _result; private Stream _pendingStream; private DispatcherOperation _dispatcherOperation; #endregion Private } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- //// Copyright (C) 2004 by Microsoft Corporation. All rights reserved. // // // Description: // Implements the PageContentAsyncResult // // History: // 02/25/2004 - Zhenbin Xu (ZhenbinX) - Created. // // //--------------------------------------------------------------------------- namespace System.Windows.Documents { using System; using System.Diagnostics; using System.IO; using System.Windows.Threading; using System.Threading; using MS.Internal; using MS.Internal.AppModel; using MS.Internal.Utility; using MS.Internal.Navigation; using MS.Utility; using System.Reflection; using System.Windows.Controls; using System.Windows.Markup; using System.Net; using System.IO.Packaging; ////// IAsyncResult for GetPageAsync. This item is passed around and queued up during various /// phase of async call. /// internal sealed class PageContentAsyncResult : IAsyncResult { //------------------------------------------------------------------- // // Internal enum // //--------------------------------------------------------------------- internal enum GetPageStatus { Loading, Cancelled, Finished } //-------------------------------------------------------------------- // // Ctor // //--------------------------------------------------------------------- #region Ctor internal PageContentAsyncResult(AsyncCallback callback, object state, Dispatcher dispatcher, Uri baseUri, Uri source, FixedPage child) { this._dispatcher = dispatcher; this._isCompleted = false; this._completedSynchronously = false; this._callback = callback; this._asyncState = state; this._getpageStatus = GetPageStatus.Loading; this._child = child; this._baseUri = baseUri; Debug.Assert(source == null || source.IsAbsoluteUri); this._source = source; } #endregion Ctor //-------------------------------------------------------------------- // // Public Methods // //---------------------------------------------------------------------- //------------------------------------------------------------------- // // Public Properties // //---------------------------------------------------------------------- #region IAsyncResult //--------------------------------------------------------------------- ////// Gets a user-defined object that contains information about /// this GetPageAsync call /// public object AsyncState { get { return _asyncState; } } //--------------------------------------------------------------------- ////// Gets a WaitHandle that is used to wait for the asynchrounus /// GetPageAsync to complete. We are not providing WaitHandle /// since this can be called on the main UIThread. /// public WaitHandle AsyncWaitHandle { get { Debug.Assert(false); return null; } } //--------------------------------------------------------------------- ////// Gets an indication of whether the asynchronous GetPage /// completed synchronously. /// public bool CompletedSynchronously { get { return _completedSynchronously; } } //---------------------------------------------------------------------- ////// Gets an indication whether the asynchronous GetPage has finished /// public bool IsCompleted { get { return _isCompleted; } } #endregion IAsyncResult //------------------------------------------------------------------- // // Internal Methods // //---------------------------------------------------------------------- #region DispatcherOperationCallback //---------------------------------------------------------------------- internal object Dispatch(object arg) { if (this._exception != null) { // force finish if there was any exception this._getpageStatus = GetPageStatus.Finished; } switch (this._getpageStatus) { case GetPageStatus.Loading: try { if (this._child != null) { this._completedSynchronously = true; this._result = this._child; _getpageStatus = GetPageStatus.Finished; goto case GetPageStatus.Finished; } // // Note if _source == null, exception will // be thrown. // Stream responseStream = null; object o = null; WebResponse response = WpfWebRequestHelper.CreateRequestAndGetResponse(this._source); responseStream = response.GetResponseStream(); ParserContext pc = new ParserContext(); pc.BaseUri = this._source; XpsValidatingLoader loader = new XpsValidatingLoader(); o = loader.Load(responseStream, _baseUri, pc, new ContentType(response.ContentType)); if (o == null) { throw new ApplicationException(SR.Get(SRID.PageContentUnsupportedMimeType)); } _result = o as FixedPage; if (_result == null) { throw new ApplicationException(SR.Get(SRID.PageContentUnsupportedPageType, o.GetType())); } if (_result.IsInitialized) { responseStream.Close(); } else { _pendingStream = responseStream; _result.Initialized += new EventHandler(_OnPaserFinished); } _getpageStatus = GetPageStatus.Finished; } catch (ApplicationException e) { this._exception = e; } goto case GetPageStatus.Finished; case GetPageStatus.Cancelled: // do nothing goto case GetPageStatus.Finished; case GetPageStatus.Finished: _isCompleted = true; if (_callback != null) { _callback(this); } break; } return null; } #endregion DispatcherOperationCallback //----------------------------------------------------------------- internal void Cancel() { _getpageStatus = GetPageStatus.Cancelled; // } internal void Wait() { _dispatcherOperation.Wait(); } //-------------------------------------------------------------------- // // Internal Properties // //--------------------------------------------------------------------- #region Internal Properties //--------------------------------------------------------------------- internal Exception Exception { get { return _exception; } } //----------------------------------------------------------------- internal bool IsCancelled { get { return _getpageStatus == GetPageStatus.Cancelled; } } internal DispatcherOperation DispatcherOperation { set { _dispatcherOperation = value; } } //------------------------------------------------------------------ internal FixedPage Result { get { return _result; } } #endregion Internal Properties //------------------------------------------------------------------- // // Private Methods // //---------------------------------------------------------------------- #region Private Methods private void _OnPaserFinished(object sender, EventArgs args) { if (_pendingStream != null) { _pendingStream.Close(); _pendingStream = null; } } #endregion Private Methods //-------------------------------------------------------------------- // // Private Fields // //--------------------------------------------------------------------- #region Private private object _asyncState; private bool _isCompleted; private bool _completedSynchronously; private AsyncCallback _callback; private Exception _exception; private GetPageStatus _getpageStatus; private Uri _baseUri; private Uri _source; private FixedPage _child; private Dispatcher _dispatcher; private FixedPage _result; private Stream _pendingStream; private DispatcherOperation _dispatcherOperation; #endregion Private } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Win32SafeHandles.cs
- FormViewRow.cs
- Error.cs
- TileBrush.cs
- RemoteWebConfigurationHostStream.cs
- DeclarativeCatalogPart.cs
- ServiceNameElementCollection.cs
- DataGridViewCellCancelEventArgs.cs
- ConstraintStruct.cs
- RotateTransform.cs
- URI.cs
- TextEditorParagraphs.cs
- externdll.cs
- CompositeKey.cs
- CodeAttributeArgumentCollection.cs
- DoubleStorage.cs
- FileSecurity.cs
- State.cs
- ListBoxItemWrapperAutomationPeer.cs
- PageResolution.cs
- BamlTreeUpdater.cs
- XmlnsPrefixAttribute.cs
- DbMetaDataCollectionNames.cs
- TemplateField.cs
- FileNotFoundException.cs
- DataGridViewColumnDesignTimeVisibleAttribute.cs
- DLinqTableProvider.cs
- Knowncolors.cs
- HwndMouseInputProvider.cs
- HostVisual.cs
- WorkflowRuntimeServiceElementCollection.cs
- TimeManager.cs
- Codec.cs
- MenuBindingsEditor.cs
- RSAOAEPKeyExchangeFormatter.cs
- MenuItemBinding.cs
- RIPEMD160.cs
- SingleTagSectionHandler.cs
- RouteItem.cs
- DatagridviewDisplayedBandsData.cs
- PasswordTextNavigator.cs
- OdbcConnectionOpen.cs
- AQNBuilder.cs
- ReflectionUtil.cs
- CompilerCollection.cs
- DataSourceCache.cs
- SemaphoreFullException.cs
- AuthenticationConfig.cs
- MailWriter.cs
- QuaternionAnimationBase.cs
- Utility.cs
- TypeContext.cs
- CodeDelegateInvokeExpression.cs
- DrawingContextDrawingContextWalker.cs
- CaseInsensitiveComparer.cs
- CodeDirectoryCompiler.cs
- Matrix3D.cs
- ComPlusContractBehavior.cs
- LinkClickEvent.cs
- EventListener.cs
- CodeConstructor.cs
- ValueCollectionParameterReader.cs
- Psha1DerivedKeyGenerator.cs
- CodePageEncoding.cs
- ImageCodecInfoPrivate.cs
- WorkflowInstanceSuspendedRecord.cs
- FileDataSourceCache.cs
- StrokeCollectionConverter.cs
- BasicKeyConstraint.cs
- Misc.cs
- FieldToken.cs
- NativeWindow.cs
- AccessDataSource.cs
- ProxyGenerationError.cs
- ListBindableAttribute.cs
- UpdateRecord.cs
- SqlDataSourceFilteringEventArgs.cs
- ISessionStateStore.cs
- ArrayWithOffset.cs
- StatusBarItemAutomationPeer.cs
- FacetDescription.cs
- DetailsViewModeEventArgs.cs
- CompoundFileIOPermission.cs
- SchemaEntity.cs
- Inflater.cs
- NavigationWindow.cs
- Pair.cs
- EventEntry.cs
- WSSecurityPolicy.cs
- BitmapInitialize.cs
- UnmanagedMarshal.cs
- TextRangeEditLists.cs
- GridViewSortEventArgs.cs
- FactoryGenerator.cs
- LocalizationParserHooks.cs
- ArrangedElementCollection.cs
- TcpProcessProtocolHandler.cs
- BigInt.cs
- FilteredAttributeCollection.cs
- XmlWriterSettings.cs