Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / 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
- ApplicationSecurityInfo.cs
- HandledMouseEvent.cs
- RegistrationServices.cs
- KeyToListMap.cs
- TargetControlTypeCache.cs
- MatrixStack.cs
- ObjectSet.cs
- TableProvider.cs
- CheckedPointers.cs
- RootBrowserWindowProxy.cs
- MetabaseSettingsIis7.cs
- ISessionStateStore.cs
- DBDataPermissionAttribute.cs
- FastPropertyAccessor.cs
- DataGridViewCellMouseEventArgs.cs
- DataRecordInfo.cs
- TdsRecordBufferSetter.cs
- VolatileEnlistmentState.cs
- XmlDownloadManager.cs
- _DomainName.cs
- ConfigurationSectionHelper.cs
- TextElementCollection.cs
- TimeManager.cs
- BulletedList.cs
- XNodeNavigator.cs
- ExpressionContext.cs
- ViewStateModeByIdAttribute.cs
- HandlerBase.cs
- ColorAnimation.cs
- DelegatedStream.cs
- InstanceOwnerQueryResult.cs
- PropertyEntry.cs
- RefreshPropertiesAttribute.cs
- Accessors.cs
- cookiecollection.cs
- ApplicationManager.cs
- RequestSecurityToken.cs
- ConversionContext.cs
- ThemeableAttribute.cs
- SafeSecurityHandles.cs
- TextEvent.cs
- HwndHost.cs
- OutputCacheProviderCollection.cs
- SecurityAlgorithmSuite.cs
- PropertyGroupDescription.cs
- GridErrorDlg.cs
- XmlILStorageConverter.cs
- ContentIterators.cs
- RegexBoyerMoore.cs
- ScriptResourceMapping.cs
- SqlDataReaderSmi.cs
- HwndMouseInputProvider.cs
- StringAnimationBase.cs
- ObjectDataSourceStatusEventArgs.cs
- ComponentSerializationService.cs
- SerializationFieldInfo.cs
- Int16Storage.cs
- XmlAttributes.cs
- _AuthenticationState.cs
- TextDecoration.cs
- SafeThemeHandle.cs
- BrushMappingModeValidation.cs
- OutputScopeManager.cs
- EncodingTable.cs
- BufferBuilder.cs
- ObjectRef.cs
- CallSiteBinder.cs
- PeerObject.cs
- PropertyValidationContext.cs
- COM2PictureConverter.cs
- SHA1.cs
- ContainerUIElement3D.cs
- WindowsBrush.cs
- PageVisual.cs
- HtmlCalendarAdapter.cs
- Transform3DGroup.cs
- CommentGlyph.cs
- EntityParameterCollection.cs
- GraphicsContainer.cs
- Application.cs
- ZipIOCentralDirectoryFileHeader.cs
- CollectionViewProxy.cs
- ContainerAction.cs
- WorkflowInstance.cs
- Size.cs
- ObfuscationAttribute.cs
- DiscoveryOperationContext.cs
- SystemFonts.cs
- AggregateNode.cs
- LineProperties.cs
- TextInfo.cs
- OracleDataReader.cs
- XmlNode.cs
- Rotation3DKeyFrameCollection.cs
- RelationshipEnd.cs
- EntityDataSourceWizardForm.cs
- ChildrenQuery.cs
- RuntimeTrackingProfile.cs
- ParallelRangeManager.cs
- XmlSchemaElement.cs