Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / Imaging / BitmapMetadataEnumerator.cs / 1 / BitmapMetadataEnumerator.cs
//------------------------------------------------------------------------------ // Microsoft Windows Client Platform // Copyright (c) Microsoft Corporation, 2005 // // File: BitmapMetadataEnumerator.cs //----------------------------------------------------------------------------- // Allow suppression of certain presharp messages #pragma warning disable 1634, 1691 using System; using System.Collections; using System.Collections.Generic; using System.Runtime.InteropServices; using System.Security; using System.Security.Permissions; using System.Diagnostics; using MS.Internal; using MS.Internal.PresentationCore; // SecurityHelper using MS.Win32.PresentationCore; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media.Imaging { ////// An enumerator that iterates over the children of a timeline. /// internal struct BitmapMetadataEnumerator : IEnumerator, IEnumerator { #region External interface #region IEnumerator interface #region Properties /// /// Gets the current element in the collection. /// ////// The current element in the collection. /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] object IEnumerator.Current { get { return Current; } } #endregion // Properties #region Methods ////// Advances the enumerator to the next element of the collection. /// ////// True if the enumerator was successfully advanced to the next element; /// false if the enumerator has passed the end of the collection. /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] public bool MoveNext() { if (_fStarted && _current == null) { return false; } _fStarted = true; IntPtr ppStr = IntPtr.Zero; Int32 celtFetched = 0; try { int hr = UnsafeNativeMethods.EnumString.Next( _enumeratorHandle, 1, ref ppStr, ref celtFetched); if (HRESULT.IsWindowsCodecError(hr)) { _current = null; return false; } HRESULT.Check(hr); if (celtFetched == 0) { _current = null; return false; } else { _current = Marshal.PtrToStringUni(ppStr); } } finally { if (ppStr != IntPtr.Zero) { Marshal.FreeCoTaskMem(ppStr); ppStr = IntPtr.Zero; } } return true; } ////// Sets the enumerator to its initial position, which is before the first element /// in the collection. /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] public void Reset() { HRESULT.Check(UnsafeNativeMethods.EnumString.Reset(_enumeratorHandle)); _current = null; _fStarted = false; } #endregion // Methods #endregion // IEnumerator interface #region Properties ////// The current timeline referenced by this enumerator. /// public String Current { get { if (_current == null) { if (!_fStarted) { #pragma warning suppress 56503 // Suppress presharp warning: Follows a pattern similar to Nullable. throw new InvalidOperationException(SR.Get(SRID.Enumerator_NotStarted)); } else { #pragma warning suppress 56503 // Suppress presharp warning: Follows a pattern similar to Nullable. throw new InvalidOperationException(SR.Get(SRID.Enumerator_ReachedEnd)); } } return _current; } } ////// /// void IDisposable.Dispose() { // Do nothing - Required by the IEnumerable contract. } #endregion // Properties #endregion // External interface #region Internal implementation #region Construction ////// Creates an enumerator iterates over the children of the specified container. /// /// /// Handle to a metadata query reader/writer /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] internal BitmapMetadataEnumerator(SafeMILHandle metadataHandle) { Debug.Assert(metadataHandle != null && !metadataHandle.IsInvalid); HRESULT.Check(UnsafeNativeMethods.WICMetadataQueryReader.GetEnumerator( metadataHandle, out _enumeratorHandle)); _current = null; _fStarted = false; } #endregion // Construction #region Methods #endregion // Methods #region Data ////// Critical - pointer to an unmanaged object that methods are called on. /// [SecurityCritical] private SafeMILHandle _enumeratorHandle; private String _current; private bool _fStarted; #endregion // Data #endregion // Internal implementation } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Windows Client Platform // Copyright (c) Microsoft Corporation, 2005 // // File: BitmapMetadataEnumerator.cs //----------------------------------------------------------------------------- // Allow suppression of certain presharp messages #pragma warning disable 1634, 1691 using System; using System.Collections; using System.Collections.Generic; using System.Runtime.InteropServices; using System.Security; using System.Security.Permissions; using System.Diagnostics; using MS.Internal; using MS.Internal.PresentationCore; // SecurityHelper using MS.Win32.PresentationCore; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media.Imaging { ////// An enumerator that iterates over the children of a timeline. /// internal struct BitmapMetadataEnumerator : IEnumerator, IEnumerator { #region External interface #region IEnumerator interface #region Properties /// /// Gets the current element in the collection. /// ////// The current element in the collection. /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] object IEnumerator.Current { get { return Current; } } #endregion // Properties #region Methods ////// Advances the enumerator to the next element of the collection. /// ////// True if the enumerator was successfully advanced to the next element; /// false if the enumerator has passed the end of the collection. /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] public bool MoveNext() { if (_fStarted && _current == null) { return false; } _fStarted = true; IntPtr ppStr = IntPtr.Zero; Int32 celtFetched = 0; try { int hr = UnsafeNativeMethods.EnumString.Next( _enumeratorHandle, 1, ref ppStr, ref celtFetched); if (HRESULT.IsWindowsCodecError(hr)) { _current = null; return false; } HRESULT.Check(hr); if (celtFetched == 0) { _current = null; return false; } else { _current = Marshal.PtrToStringUni(ppStr); } } finally { if (ppStr != IntPtr.Zero) { Marshal.FreeCoTaskMem(ppStr); ppStr = IntPtr.Zero; } } return true; } ////// Sets the enumerator to its initial position, which is before the first element /// in the collection. /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] public void Reset() { HRESULT.Check(UnsafeNativeMethods.EnumString.Reset(_enumeratorHandle)); _current = null; _fStarted = false; } #endregion // Methods #endregion // IEnumerator interface #region Properties ////// The current timeline referenced by this enumerator. /// public String Current { get { if (_current == null) { if (!_fStarted) { #pragma warning suppress 56503 // Suppress presharp warning: Follows a pattern similar to Nullable. throw new InvalidOperationException(SR.Get(SRID.Enumerator_NotStarted)); } else { #pragma warning suppress 56503 // Suppress presharp warning: Follows a pattern similar to Nullable. throw new InvalidOperationException(SR.Get(SRID.Enumerator_ReachedEnd)); } } return _current; } } ////// /// void IDisposable.Dispose() { // Do nothing - Required by the IEnumerable contract. } #endregion // Properties #endregion // External interface #region Internal implementation #region Construction ////// Creates an enumerator iterates over the children of the specified container. /// /// /// Handle to a metadata query reader/writer /// ////// Critical - Accesses unmanaged code /// TreatAsSafe - inputs are verified or safe /// [SecurityCritical, SecurityTreatAsSafe] internal BitmapMetadataEnumerator(SafeMILHandle metadataHandle) { Debug.Assert(metadataHandle != null && !metadataHandle.IsInvalid); HRESULT.Check(UnsafeNativeMethods.WICMetadataQueryReader.GetEnumerator( metadataHandle, out _enumeratorHandle)); _current = null; _fStarted = false; } #endregion // Construction #region Methods #endregion // Methods #region Data ////// Critical - pointer to an unmanaged object that methods are called on. /// [SecurityCritical] private SafeMILHandle _enumeratorHandle; private String _current; private bool _fStarted; #endregion // Data #endregion // Internal implementation } } // 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
- MulticastOption.cs
- Freezable.cs
- SerializableAttribute.cs
- SignedInfo.cs
- ContextActivityUtils.cs
- _TransmitFileOverlappedAsyncResult.cs
- BasePattern.cs
- ObjectItemCollection.cs
- ObjectSet.cs
- ProcessThread.cs
- XmlSchemaType.cs
- CachedPathData.cs
- XpsSerializationException.cs
- autovalidator.cs
- EntityStoreSchemaFilterEntry.cs
- ToolStripTextBox.cs
- FastEncoder.cs
- CollectionBase.cs
- sqlnorm.cs
- OdbcConnectionString.cs
- DesignerVerb.cs
- InternalResources.cs
- CallbackValidatorAttribute.cs
- DbParameterCollectionHelper.cs
- EntityProviderFactory.cs
- GroupLabel.cs
- LogReserveAndAppendState.cs
- CodeArrayCreateExpression.cs
- SqlCacheDependencySection.cs
- CodeAccessSecurityEngine.cs
- ParserContext.cs
- DateTimeSerializationSection.cs
- ResXResourceWriter.cs
- TextUtf8RawTextWriter.cs
- TreeBuilder.cs
- SelectionWordBreaker.cs
- OracleParameterBinding.cs
- NameSpaceExtractor.cs
- Query.cs
- brushes.cs
- DataBoundControlHelper.cs
- AutomationProperty.cs
- httpapplicationstate.cs
- FloatSumAggregationOperator.cs
- TcpServerChannel.cs
- GridViewRow.cs
- RtfToXamlLexer.cs
- GeneralTransformGroup.cs
- HebrewNumber.cs
- SharedStatics.cs
- VisualState.cs
- RuntimeTransactionHandle.cs
- ArraySet.cs
- CompareInfo.cs
- DataGridViewCellStateChangedEventArgs.cs
- ContextMenuStrip.cs
- SqlMethodAttribute.cs
- CodeIdentifiers.cs
- X509ChainElement.cs
- CryptoKeySecurity.cs
- Constraint.cs
- DataObject.cs
- VectorValueSerializer.cs
- IdentityReference.cs
- ParameterToken.cs
- FileDialog.cs
- DateTimeOffset.cs
- AsmxEndpointPickerExtension.cs
- NonSerializedAttribute.cs
- XmlQuerySequence.cs
- IntSecurity.cs
- AlphaSortedEnumConverter.cs
- PerformanceCounterTraceRecord.cs
- XmlReturnReader.cs
- ComboBoxRenderer.cs
- MsmqIntegrationSecurityElement.cs
- XmlAttributes.cs
- ReachSerializationCacheItems.cs
- Int64Converter.cs
- ContourSegment.cs
- TrustLevel.cs
- HtmlTitle.cs
- OdbcConnectionHandle.cs
- ToolTip.cs
- WindowsContainer.cs
- HttpHandlersSection.cs
- StartUpEventArgs.cs
- Activation.cs
- Bold.cs
- EventDescriptorCollection.cs
- StringConcat.cs
- Crc32.cs
- CompilerWrapper.cs
- GroupBoxRenderer.cs
- DesignerSerializerAttribute.cs
- TerminatorSinks.cs
- RetriableClipboard.cs
- TextElementCollectionHelper.cs
- __Filters.cs
- Publisher.cs