Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Objects / ObjectStateEntryDbDataRecord.cs / 1305376 / ObjectStateEntryDbDataRecord.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Data; using System.Data.Common; using System.ComponentModel; using System.Data.Metadata.Edm; using System.Diagnostics; namespace System.Data.Objects { internal sealed class ObjectStateEntryDbDataRecord : DbDataRecord, IExtendedDataRecord { private readonly StateManagerTypeMetadata _metadata; private readonly ObjectStateEntry _cacheEntry; private readonly object _userObject; private DataRecordInfo _recordInfo; internal ObjectStateEntryDbDataRecord(EntityEntry cacheEntry, StateManagerTypeMetadata metadata, object userObject) { EntityUtil.CheckArgumentNull(cacheEntry, "cacheEntry"); EntityUtil.CheckArgumentNull(userObject, "userObject"); EntityUtil.CheckArgumentNull(metadata, "metadata"); Debug.Assert(!cacheEntry.IsKeyEntry, "Cannot create an ObjectStateEntryDbDataRecord for a key entry"); switch (cacheEntry.State) { case EntityState.Unchanged: case EntityState.Modified: case EntityState.Deleted: _cacheEntry = cacheEntry; _userObject = userObject; _metadata = metadata; break; default: Debug.Assert(false, "A DbDataRecord cannot be created for an entity object that is in an added or detached state."); break; } } internal ObjectStateEntryDbDataRecord(RelationshipEntry cacheEntry) { EntityUtil.CheckArgumentNull(cacheEntry, "cacheEntry"); Debug.Assert(!cacheEntry.IsKeyEntry, "Cannot create an ObjectStateEntryDbDataRecord for a key entry"); switch (cacheEntry.State) { case EntityState.Unchanged: case EntityState.Modified: case EntityState.Deleted: _cacheEntry = cacheEntry; break; default: Debug.Assert(false, "A DbDataRecord cannot be created for an entity object that is in an added or detached state."); break; } } override public int FieldCount { get { Debug.Assert(_cacheEntry != null, "CacheEntry is required."); return _cacheEntry.GetFieldCount(_metadata); } } override public object this[int ordinal] { get { return GetValue(ordinal); } } override public object this[string name] { get { return GetValue(GetOrdinal(name)); } } override public bool GetBoolean(int ordinal) { return (bool)GetValue(ordinal); } override public byte GetByte(int ordinal) { return (byte)GetValue(ordinal); } override public long GetBytes(int ordinal, long dataIndex, byte[] buffer, int bufferIndex, int length) { byte[] tempBuffer; tempBuffer = (byte[])GetValue(ordinal); if (buffer == null) { return tempBuffer.Length; } int srcIndex = (int)dataIndex; int byteCount = Math.Min(tempBuffer.Length - srcIndex, length); if (srcIndex < 0) { throw EntityUtil.InvalidSourceBufferIndex(tempBuffer.Length, srcIndex, "dataIndex"); } else if ((bufferIndex < 0) || (bufferIndex > 0 && bufferIndex >= buffer.Length)) { throw EntityUtil.InvalidDestinationBufferIndex(buffer.Length, bufferIndex, "bufferIndex"); } if (0 < byteCount) { Array.Copy(tempBuffer, dataIndex, buffer, bufferIndex, byteCount); } else if (length < 0) { throw EntityUtil.InvalidDataLength(length); } else { byteCount = 0; } return byteCount; } override public char GetChar(int ordinal) { return (char)GetValue(ordinal); } override public long GetChars(int ordinal, long dataIndex, char[] buffer, int bufferIndex, int length) { char[] tempBuffer; tempBuffer = (char[])GetValue(ordinal); if (buffer == null) { return tempBuffer.Length; } int srcIndex = (int)dataIndex; int charCount = Math.Min(tempBuffer.Length - srcIndex, length); if (srcIndex < 0) { throw EntityUtil.InvalidSourceBufferIndex(buffer.Length, bufferIndex, "bufferIndex"); } else if ((bufferIndex < 0) || (bufferIndex > 0 && bufferIndex >= buffer.Length)) { throw EntityUtil.InvalidDestinationBufferIndex(buffer.Length, bufferIndex, "bufferIndex"); } if (0 < charCount) { Array.Copy(tempBuffer, dataIndex, buffer, bufferIndex, charCount); } else if (length < 0) { throw EntityUtil.InvalidDataLength(length); } else { charCount = 0; } return charCount; } override protected DbDataReader GetDbDataReader(int ordinal) { throw EntityUtil.NotSupported(); } override public string GetDataTypeName(int ordinal) { return (GetFieldType(ordinal)).Name; } override public DateTime GetDateTime(int ordinal) { return (DateTime)GetValue(ordinal); } override public Decimal GetDecimal(int ordinal) { return (Decimal)GetValue(ordinal); } override public double GetDouble(int ordinal) { return (Double)GetValue(ordinal); } public override Type GetFieldType(int ordinal) { return _cacheEntry.GetFieldType(ordinal, _metadata); } override public float GetFloat(int ordinal) { return (float)GetValue(ordinal); } override public Guid GetGuid(int ordinal) { return (Guid)GetValue(ordinal); } override public Int16 GetInt16(int ordinal) { return (Int16)GetValue(ordinal); } override public Int32 GetInt32(int ordinal) { return (Int32)GetValue(ordinal); } override public Int64 GetInt64(int ordinal) { return (Int64)GetValue(ordinal); } override public string GetName(int ordinal) { return _cacheEntry.GetCLayerName(ordinal, _metadata); } override public int GetOrdinal(string name) { int ordinal = _cacheEntry.GetOrdinalforCLayerName(name, _metadata); if (ordinal == -1) { throw EntityUtil.ArgumentOutOfRange("name"); } return ordinal; } override public string GetString(int ordinal) { return (string)GetValue(ordinal); } override public object GetValue(int ordinal) { if (_cacheEntry.IsRelationship) { return (_cacheEntry as RelationshipEntry).GetOriginalRelationValue(ordinal); } else { return (_cacheEntry as EntityEntry).GetOriginalEntityValue(_metadata, ordinal, _userObject, ObjectStateValueRecord.OriginalReadonly); } } override public int GetValues(object[] values) { if (values == null) { throw EntityUtil.ArgumentNull("values"); } int minValue = Math.Min(values.Length, FieldCount); for (int i = 0; i < minValue; i++) { values[i] = GetValue(i); } return minValue; } override public bool IsDBNull(int ordinal) { return (GetValue(ordinal) == DBNull.Value); } public DataRecordInfo DataRecordInfo { get { if (null == _recordInfo) { Debug.Assert(_cacheEntry != null, "CacheEntry is required."); _recordInfo = _cacheEntry.GetDataRecordInfo(_metadata, _userObject); } return _recordInfo; } } public DbDataRecord GetDataRecord(int ordinal) { return (DbDataRecord)GetValue(ordinal); } public DbDataReader GetDataReader(int i) { return this.GetDbDataReader(i); } } } // 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
- QueryContext.cs
- ControlOperationBehavior.cs
- GacUtil.cs
- SystemTcpStatistics.cs
- EntityContainer.cs
- mediaclock.cs
- XmlSerializerVersionAttribute.cs
- AdditionalEntityFunctions.cs
- SoundPlayerAction.cs
- BinaryObjectReader.cs
- ProxyAttribute.cs
- SizeAnimation.cs
- ProxyManager.cs
- ListViewGroupItemCollection.cs
- ValueTable.cs
- SqlNodeTypeOperators.cs
- ContentType.cs
- Clock.cs
- MyContact.cs
- AspNetHostingPermission.cs
- HttpListenerPrefixCollection.cs
- HostedImpersonationContext.cs
- NestedContainer.cs
- HostingEnvironmentSection.cs
- BitmapCodecInfoInternal.cs
- RepeaterItem.cs
- TransformerInfoCollection.cs
- SecurityAlgorithmSuite.cs
- BamlLocalizableResourceKey.cs
- PointUtil.cs
- RMPermissions.cs
- SequentialUshortCollection.cs
- SchemaContext.cs
- SecurityException.cs
- ProxyAttribute.cs
- ForEachAction.cs
- SystemUnicastIPAddressInformation.cs
- SmiEventSink.cs
- ICollection.cs
- Vector3DConverter.cs
- TableRow.cs
- TailPinnedEventArgs.cs
- ParserHooks.cs
- TextElementEnumerator.cs
- TreeNodeMouseHoverEvent.cs
- FontFamily.cs
- UseLicense.cs
- HttpCachePolicyElement.cs
- CodeVariableReferenceExpression.cs
- TrackingDataItem.cs
- ListViewDeleteEventArgs.cs
- ComplexTypeEmitter.cs
- MemberJoinTreeNode.cs
- ScriptResourceDefinition.cs
- InvalidPropValue.cs
- AnnotationService.cs
- XmlQuerySequence.cs
- EntityDataSourceWizardForm.cs
- ParseNumbers.cs
- SymbolUsageManager.cs
- DragStartedEventArgs.cs
- StringUtil.cs
- UIElement.cs
- TargetParameterCountException.cs
- NoClickablePointException.cs
- ValueHandle.cs
- DataGridState.cs
- CachedTypeface.cs
- ChunkedMemoryStream.cs
- securitycriticaldataClass.cs
- MouseGestureValueSerializer.cs
- ToolZone.cs
- DifferencingCollection.cs
- FlowDecision.cs
- ScriptBehaviorDescriptor.cs
- SectionUpdates.cs
- XmlEncoding.cs
- ContentWrapperAttribute.cs
- DataTablePropertyDescriptor.cs
- NullableBoolConverter.cs
- TextFormatterImp.cs
- RectangleConverter.cs
- OverrideMode.cs
- filewebresponse.cs
- UnsafeNativeMethods.cs
- LookupBindingPropertiesAttribute.cs
- TableLayoutPanel.cs
- RelatedCurrencyManager.cs
- OpenTypeLayoutCache.cs
- ListViewDataItem.cs
- ResourceSet.cs
- InputLanguageCollection.cs
- LabelLiteral.cs
- DataRowView.cs
- DataGridView.cs
- CmsInterop.cs
- FileReader.cs
- ToolStripComboBox.cs
- AdRotator.cs
- _IPv6Address.cs