Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Data / System / Data / Common / FieldNameLookup.cs / 1 / FieldNameLookup.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.ProviderBase { using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Diagnostics; using System.Globalization; using System.Text; internal sealed class FieldNameLookup { // V1.2.3300, MDAC 69015, 71470 // hashtable stores the index into the _fieldNames, match via case-sensitive private Hashtable _fieldNameLookup; // original names for linear searches when exact matches fail private string[] _fieldNames; // if _defaultLocaleID is -1 then _compareInfo is initialized with InvariantCulture CompareInfo // otherwise it is specified by the server? for the correct compare info private CompareInfo _compareInfo; private int _defaultLocaleID; #if !ORACLE public FieldNameLookup(string[] fieldNames, int defaultLocaleID) { // V1.2.3300 if (null == fieldNames) { throw ADP.ArgumentNull("fieldNames"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; } #endif public FieldNameLookup(IDataReader reader, int defaultLocaleID) { // V1.2.3300 int length = reader.FieldCount; string[] fieldNames = new string[length]; for (int i = 0; i < length; ++i) { fieldNames[i] = reader.GetName(i); Debug.Assert(null != fieldNames[i], "MDAC 66681"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; } public int GetOrdinal(string fieldName) { // V1.2.3300 if (null == fieldName) { throw ADP.ArgumentNull("fieldName"); } int index = IndexOf(fieldName); if (-1 == index) { throw ADP.IndexOutOfRange(fieldName); } return index; } #if !ORACLE public int IndexOfName(string fieldName) { // V1.2.3300 if (null == _fieldNameLookup) { GenerateLookup(); } // via case sensitive search, first match with lowest ordinal matches object value = _fieldNameLookup[fieldName]; return ((null != value) ? (int) value : -1); } #endif public int IndexOf(string fieldName) { // V1.2.3300 if (null == _fieldNameLookup) { GenerateLookup(); } int index; object value = _fieldNameLookup[fieldName]; if (null != value) { // via case sensitive search, first match with lowest ordinal matches index = (int) value; } else { // via case insensitive search, first match with lowest ordinal matches index = LinearIndexOf(fieldName, CompareOptions.IgnoreCase); if (-1 == index) { // do the slow search now (kana, width insensitive comparison) index = LinearIndexOf(fieldName, ADP.compareOptions); } } return index; } private int LinearIndexOf(string fieldName, CompareOptions compareOptions) { CompareInfo compareInfo = _compareInfo; if (null == compareInfo) { if (-1 != _defaultLocaleID) { compareInfo = CompareInfo.GetCompareInfo(_defaultLocaleID); } if (null == compareInfo) { compareInfo = CultureInfo.InvariantCulture.CompareInfo; } _compareInfo = compareInfo; } int length = _fieldNames.Length; for (int i = 0; i < length; ++i) { if (0 == compareInfo.Compare(fieldName, _fieldNames[i], compareOptions)) { _fieldNameLookup[fieldName] = i; // add an exact match for the future return i; } } return -1; } // RTM common code for generating Hashtable from array of column names private void GenerateLookup() { int length = _fieldNames.Length; Hashtable hash = new Hashtable(length); // via case sensitive search, first match with lowest ordinal matches for (int i = length-1; 0 <= i; --i) { string fieldName = _fieldNames[i]; hash[fieldName] = i; } _fieldNameLookup = hash; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.ProviderBase { using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Diagnostics; using System.Globalization; using System.Text; internal sealed class FieldNameLookup { // V1.2.3300, MDAC 69015, 71470 // hashtable stores the index into the _fieldNames, match via case-sensitive private Hashtable _fieldNameLookup; // original names for linear searches when exact matches fail private string[] _fieldNames; // if _defaultLocaleID is -1 then _compareInfo is initialized with InvariantCulture CompareInfo // otherwise it is specified by the server? for the correct compare info private CompareInfo _compareInfo; private int _defaultLocaleID; #if !ORACLE public FieldNameLookup(string[] fieldNames, int defaultLocaleID) { // V1.2.3300 if (null == fieldNames) { throw ADP.ArgumentNull("fieldNames"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; } #endif public FieldNameLookup(IDataReader reader, int defaultLocaleID) { // V1.2.3300 int length = reader.FieldCount; string[] fieldNames = new string[length]; for (int i = 0; i < length; ++i) { fieldNames[i] = reader.GetName(i); Debug.Assert(null != fieldNames[i], "MDAC 66681"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; } public int GetOrdinal(string fieldName) { // V1.2.3300 if (null == fieldName) { throw ADP.ArgumentNull("fieldName"); } int index = IndexOf(fieldName); if (-1 == index) { throw ADP.IndexOutOfRange(fieldName); } return index; } #if !ORACLE public int IndexOfName(string fieldName) { // V1.2.3300 if (null == _fieldNameLookup) { GenerateLookup(); } // via case sensitive search, first match with lowest ordinal matches object value = _fieldNameLookup[fieldName]; return ((null != value) ? (int) value : -1); } #endif public int IndexOf(string fieldName) { // V1.2.3300 if (null == _fieldNameLookup) { GenerateLookup(); } int index; object value = _fieldNameLookup[fieldName]; if (null != value) { // via case sensitive search, first match with lowest ordinal matches index = (int) value; } else { // via case insensitive search, first match with lowest ordinal matches index = LinearIndexOf(fieldName, CompareOptions.IgnoreCase); if (-1 == index) { // do the slow search now (kana, width insensitive comparison) index = LinearIndexOf(fieldName, ADP.compareOptions); } } return index; } private int LinearIndexOf(string fieldName, CompareOptions compareOptions) { CompareInfo compareInfo = _compareInfo; if (null == compareInfo) { if (-1 != _defaultLocaleID) { compareInfo = CompareInfo.GetCompareInfo(_defaultLocaleID); } if (null == compareInfo) { compareInfo = CultureInfo.InvariantCulture.CompareInfo; } _compareInfo = compareInfo; } int length = _fieldNames.Length; for (int i = 0; i < length; ++i) { if (0 == compareInfo.Compare(fieldName, _fieldNames[i], compareOptions)) { _fieldNameLookup[fieldName] = i; // add an exact match for the future return i; } } return -1; } // RTM common code for generating Hashtable from array of column names private void GenerateLookup() { int length = _fieldNames.Length; Hashtable hash = new Hashtable(length); // via case sensitive search, first match with lowest ordinal matches for (int i = length-1; 0 <= i; --i) { string fieldName = _fieldNames[i]; hash[fieldName] = i; } _fieldNameLookup = hash; } } } // 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
- AutomationAttributeInfo.cs
- RemoteWebConfigurationHostStream.cs
- TdsRecordBufferSetter.cs
- AudioException.cs
- LingerOption.cs
- ApplicationServiceHelper.cs
- ExpressionCopier.cs
- SystemNetworkInterface.cs
- SettingsAttributes.cs
- NavigatingCancelEventArgs.cs
- Exceptions.cs
- DataServiceException.cs
- CacheMode.cs
- ErrorTableItemStyle.cs
- OrderingInfo.cs
- SimpleExpression.cs
- BinHexDecoder.cs
- TextAction.cs
- DataControlFieldCollection.cs
- PageWrapper.cs
- PrintDialogException.cs
- IPEndPoint.cs
- WebHttpDispatchOperationSelectorData.cs
- ApplicationServiceHelper.cs
- TextBoxView.cs
- FormClosedEvent.cs
- Tuple.cs
- loginstatus.cs
- FontUnitConverter.cs
- StackBuilderSink.cs
- HeaderUtility.cs
- GroupLabel.cs
- TaiwanLunisolarCalendar.cs
- UnionCqlBlock.cs
- GradientStopCollection.cs
- XMLDiffLoader.cs
- SafeArrayTypeMismatchException.cs
- SqlUdtInfo.cs
- HttpVersion.cs
- GeneralTransform3DGroup.cs
- ServicesSection.cs
- RepeatButtonAutomationPeer.cs
- StructuredType.cs
- ColumnResizeAdorner.cs
- D3DImage.cs
- ToolStripSystemRenderer.cs
- SchemaTypeEmitter.cs
- EntityTransaction.cs
- PermissionAttributes.cs
- MatchAttribute.cs
- MultiSelectRootGridEntry.cs
- ApplicationException.cs
- PeerContact.cs
- OracleBFile.cs
- WebPartHeaderCloseVerb.cs
- DbConnectionPoolGroupProviderInfo.cs
- ObjectManager.cs
- AudioFormatConverter.cs
- HostExecutionContextManager.cs
- WebPartConnectionsDisconnectVerb.cs
- MethodImplAttribute.cs
- StorageFunctionMapping.cs
- ToolStrip.cs
- EqualityArray.cs
- IndexedString.cs
- Scene3D.cs
- CompositeTypefaceMetrics.cs
- SequenceQuery.cs
- NCryptNative.cs
- AttributeData.cs
- XMLDiffLoader.cs
- StringToken.cs
- PageContent.cs
- RadialGradientBrush.cs
- ColumnReorderedEventArgs.cs
- ContainerParagraph.cs
- WebSysDisplayNameAttribute.cs
- AddressHeader.cs
- MobileListItemCollection.cs
- ProviderConnectionPoint.cs
- ChtmlFormAdapter.cs
- ServicesExceptionNotHandledEventArgs.cs
- ActivityMarkupSerializationProvider.cs
- XmlSchemaAttribute.cs
- FileDetails.cs
- Propagator.JoinPropagator.cs
- RestHandlerFactory.cs
- X509SubjectKeyIdentifierClause.cs
- DbConnectionFactory.cs
- CodeTypeParameterCollection.cs
- TargetParameterCountException.cs
- ISCIIEncoding.cs
- KoreanCalendar.cs
- LexicalChunk.cs
- ASCIIEncoding.cs
- DataServiceExpressionVisitor.cs
- ExceptionUtil.cs
- DataGridViewCheckBoxColumn.cs
- ButtonChrome.cs
- BehaviorEditorPart.cs