Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Data / System / Data / OleDb / PropertyIDSet.cs / 1 / PropertyIDSet.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Data; using System.Data.Common; using System.Data.ProviderBase; using System.Diagnostics; using System.Runtime.InteropServices; using System.Runtime.CompilerServices; using System.Security; using System.Security.Permissions; namespace System.Data.OleDb { internal sealed class PropertyIDSet : DbBuffer { static private readonly int PropertyIDSetAndValueSize = ODB.SizeOf_tagDBPROPIDSET + ADP.PtrSize; // sizeof(tagDBPROPIDSET) + sizeof(int) static private readonly int PropertyIDSetSize = ODB.SizeOf_tagDBPROPIDSET; private int _count; // the PropertyID is stored at the end of the tagDBPROPIDSET structure // this way only a single memory allocation is required instead of two internal PropertyIDSet(Guid propertySet, int propertyID) : base(PropertyIDSetAndValueSize) { _count = 1; // rgPropertyIDs references where that PropertyID is stored // depending on IntPtr.Size, tagDBPROPIDSET is either 24 or 28 bytes long IntPtr ptr = ADP.IntPtrOffset(base.handle, PropertyIDSetSize); Marshal.WriteIntPtr(base.handle, 0, ptr); Marshal.WriteInt32(base.handle, ADP.PtrSize, /*propertyid count*/1); ptr = ADP.IntPtrOffset(base.handle, ODB.OffsetOf_tagDBPROPIDSET_PropertySet); Marshal.StructureToPtr(propertySet, ptr, false/*deleteold*/); // write the propertyID at the same offset Marshal.WriteInt32(base.handle, PropertyIDSetSize, propertyID); } // no propertyIDs, just the propertyset guids internal PropertyIDSet(Guid[] propertySets) : base(PropertyIDSetSize * propertySets.Length) { _count = propertySets.Length; for(int i = 0; i < propertySets.Length; ++i) { IntPtr ptr = ADP.IntPtrOffset(base.handle, (i * PropertyIDSetSize) + ODB.OffsetOf_tagDBPROPIDSET_PropertySet); Marshal.StructureToPtr(propertySets[i], ptr, false/*deleteold*/); } } internal int Count { get { return _count; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Data; using System.Data.Common; using System.Data.ProviderBase; using System.Diagnostics; using System.Runtime.InteropServices; using System.Runtime.CompilerServices; using System.Security; using System.Security.Permissions; namespace System.Data.OleDb { internal sealed class PropertyIDSet : DbBuffer { static private readonly int PropertyIDSetAndValueSize = ODB.SizeOf_tagDBPROPIDSET + ADP.PtrSize; // sizeof(tagDBPROPIDSET) + sizeof(int) static private readonly int PropertyIDSetSize = ODB.SizeOf_tagDBPROPIDSET; private int _count; // the PropertyID is stored at the end of the tagDBPROPIDSET structure // this way only a single memory allocation is required instead of two internal PropertyIDSet(Guid propertySet, int propertyID) : base(PropertyIDSetAndValueSize) { _count = 1; // rgPropertyIDs references where that PropertyID is stored // depending on IntPtr.Size, tagDBPROPIDSET is either 24 or 28 bytes long IntPtr ptr = ADP.IntPtrOffset(base.handle, PropertyIDSetSize); Marshal.WriteIntPtr(base.handle, 0, ptr); Marshal.WriteInt32(base.handle, ADP.PtrSize, /*propertyid count*/1); ptr = ADP.IntPtrOffset(base.handle, ODB.OffsetOf_tagDBPROPIDSET_PropertySet); Marshal.StructureToPtr(propertySet, ptr, false/*deleteold*/); // write the propertyID at the same offset Marshal.WriteInt32(base.handle, PropertyIDSetSize, propertyID); } // no propertyIDs, just the propertyset guids internal PropertyIDSet(Guid[] propertySets) : base(PropertyIDSetSize * propertySets.Length) { _count = propertySets.Length; for(int i = 0; i < propertySets.Length; ++i) { IntPtr ptr = ADP.IntPtrOffset(base.handle, (i * PropertyIDSetSize) + ODB.OffsetOf_tagDBPROPIDSET_PropertySet); Marshal.StructureToPtr(propertySets[i], ptr, false/*deleteold*/); } } internal int Count { get { return _count; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- XmlDataSource.cs
- HtmlInputButton.cs
- ActivitySurrogate.cs
- ToolStripSeparatorRenderEventArgs.cs
- QuaternionAnimationBase.cs
- OperandQuery.cs
- GroupByExpressionRewriter.cs
- VirtualPathProvider.cs
- MimeXmlReflector.cs
- BindingsSection.cs
- ApplicationInfo.cs
- JobPageOrder.cs
- SqlDataReader.cs
- IntPtr.cs
- ReplacementText.cs
- OperationCanceledException.cs
- UnionQueryOperator.cs
- ToolStripStatusLabel.cs
- EntryIndex.cs
- Rotation3D.cs
- ContentHostHelper.cs
- UniqueEventHelper.cs
- FileSystemEventArgs.cs
- CompilerCollection.cs
- ResponseBodyWriter.cs
- HttpProtocolReflector.cs
- SimpleColumnProvider.cs
- CodeDOMUtility.cs
- XamlRtfConverter.cs
- TCPListener.cs
- Light.cs
- Separator.cs
- SafeEventLogReadHandle.cs
- CryptoApi.cs
- TreeViewHitTestInfo.cs
- DataPagerFieldCommandEventArgs.cs
- ConstrainedDataObject.cs
- EditorAttributeInfo.cs
- SizeValueSerializer.cs
- KnownBoxes.cs
- BindingExpression.cs
- PagerSettings.cs
- EntityAdapter.cs
- ExtendedPropertyDescriptor.cs
- HttpCacheVaryByContentEncodings.cs
- HttpProxyTransportBindingElement.cs
- MatrixTransform.cs
- WebPartCancelEventArgs.cs
- XmlSecureResolver.cs
- Stack.cs
- OdbcErrorCollection.cs
- MemberProjectionIndex.cs
- JsonReaderDelegator.cs
- DBParameter.cs
- TracingConnectionInitiator.cs
- Cloud.cs
- ExtendedProtectionPolicyElement.cs
- ItemTypeToolStripMenuItem.cs
- HMACSHA384.cs
- DbRetry.cs
- HandleTable.cs
- OperationPerformanceCounters.cs
- TagNameToTypeMapper.cs
- CodeLinePragma.cs
- MobileFormsAuthentication.cs
- OdbcConnection.cs
- XmlAutoDetectWriter.cs
- QEncodedStream.cs
- PageHandlerFactory.cs
- XsltCompileContext.cs
- UrlPath.cs
- StdValidatorsAndConverters.cs
- CLRBindingWorker.cs
- DataListCommandEventArgs.cs
- EditorPart.cs
- BrowserCapabilitiesFactory.cs
- TranslateTransform.cs
- RegisteredHiddenField.cs
- _Semaphore.cs
- GlobalItem.cs
- ValidationSummary.cs
- DataGridViewTextBoxEditingControl.cs
- EntityViewContainer.cs
- DataTemplateSelector.cs
- StructuredType.cs
- PageThemeParser.cs
- TabPanel.cs
- WindowsAltTab.cs
- DataPointer.cs
- TextReturnReader.cs
- OleDbPermission.cs
- DeviceSpecificChoiceCollection.cs
- VisualStyleInformation.cs
- InteropBitmapSource.cs
- InfoCardArgumentException.cs
- OpenTypeCommon.cs
- ErrorHandler.cs
- WebServiceReceive.cs
- ClockGroup.cs
- HashMembershipCondition.cs