Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / Data / System / Data / Common / FieldNameLookup.cs / 2 / FieldNameLookup.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- #if SYSTEM_DATA_ENTITY namespace System.Data { #else // !SYSTEM_DATA_ENTITY namespace System.Data.ProviderBase { #endif // !SYSTEM_DATA_ENTITY 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 && !SYSTEM_DATA_ENTITY public FieldNameLookup(string[] fieldNames, int defaultLocaleID) { // V1.2.3300 if (null == fieldNames) { throw ADP.ArgumentNull("fieldNames"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; } #endif public FieldNameLookup(System.Collections.ObjectModel.ReadOnlyCollectioncolumnNames, int defaultLocaleID) { int length = columnNames.Count; string[] fieldNames = new string[length]; for (int i = 0; i < length; ++i) { fieldNames[i] = columnNames[i]; Debug.Assert(null != fieldNames[i], "MDAC 66681"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; GenerateLookup(); } public FieldNameLookup(IDataRecord 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 && !SYSTEM_DATA_ENTITY 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. // //[....] //[....] //----------------------------------------------------------------------------- #if SYSTEM_DATA_ENTITY namespace System.Data { #else // !SYSTEM_DATA_ENTITY namespace System.Data.ProviderBase { #endif // !SYSTEM_DATA_ENTITY 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 && !SYSTEM_DATA_ENTITY public FieldNameLookup(string[] fieldNames, int defaultLocaleID) { // V1.2.3300 if (null == fieldNames) { throw ADP.ArgumentNull("fieldNames"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; } #endif public FieldNameLookup(System.Collections.ObjectModel.ReadOnlyCollectioncolumnNames, int defaultLocaleID) { int length = columnNames.Count; string[] fieldNames = new string[length]; for (int i = 0; i < length; ++i) { fieldNames[i] = columnNames[i]; Debug.Assert(null != fieldNames[i], "MDAC 66681"); } _fieldNames = fieldNames; _defaultLocaleID = defaultLocaleID; GenerateLookup(); } public FieldNameLookup(IDataRecord 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 && !SYSTEM_DATA_ENTITY 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
- BadImageFormatException.cs
- ViewService.cs
- UnsafeNativeMethodsMilCoreApi.cs
- SoapSchemaImporter.cs
- _PooledStream.cs
- DataRelation.cs
- SpecialFolderEnumConverter.cs
- HttpCachePolicyElement.cs
- CursorInteropHelper.cs
- Collection.cs
- Filter.cs
- PackageDigitalSignatureManager.cs
- HostUtils.cs
- HtmlEncodedRawTextWriter.cs
- ToolStripLabel.cs
- ToolboxItemFilterAttribute.cs
- XamlTypeMapper.cs
- SymbolTable.cs
- DES.cs
- XmlWellformedWriter.cs
- SqlCacheDependency.cs
- DbBuffer.cs
- AuthenticationModuleElementCollection.cs
- DeferredBinaryDeserializerExtension.cs
- DbDataReader.cs
- Unit.cs
- NullReferenceException.cs
- URLString.cs
- DefaultValueTypeConverter.cs
- SocketAddress.cs
- PartitionResolver.cs
- MaskDescriptors.cs
- LinearKeyFrames.cs
- AnimationLayer.cs
- RectAnimationUsingKeyFrames.cs
- DBDataPermission.cs
- XmlAttribute.cs
- HtmlToClrEventProxy.cs
- RulePatternOps.cs
- HijriCalendar.cs
- CompilerHelpers.cs
- ToolBarButtonDesigner.cs
- __ComObject.cs
- InputEventArgs.cs
- ChangeProcessor.cs
- RegexWriter.cs
- SQLSingleStorage.cs
- X500Name.cs
- SqlParameterCollection.cs
- WebAdminConfigurationHelper.cs
- _NestedSingleAsyncResult.cs
- DateTimeUtil.cs
- arabicshape.cs
- SpeechRecognizer.cs
- Pkcs7Signer.cs
- VisualStyleRenderer.cs
- HttpValueCollection.cs
- ExpandSegmentCollection.cs
- WindowManager.cs
- OdbcEnvironmentHandle.cs
- CommandBinding.cs
- ListenerPerfCounters.cs
- InfiniteIntConverter.cs
- ReadOnlyMetadataCollection.cs
- ColorConverter.cs
- FixedFlowMap.cs
- CqlBlock.cs
- WaitForChangedResult.cs
- WebPartDisplayModeCollection.cs
- WSFederationHttpBindingCollectionElement.cs
- ToolStripArrowRenderEventArgs.cs
- GridItemProviderWrapper.cs
- Button.cs
- SelectorItemAutomationPeer.cs
- EventLogWatcher.cs
- Label.cs
- HwndHostAutomationPeer.cs
- IsolatedStorageSecurityState.cs
- TemplateBindingExtension.cs
- DeviceFilterEditorDialog.cs
- ProxySimple.cs
- DataGridViewCellStyleConverter.cs
- IProvider.cs
- DynamicMetaObjectBinder.cs
- WebPartEditorOkVerb.cs
- IntegerValidator.cs
- OrderingQueryOperator.cs
- WSSecureConversationFeb2005.cs
- HtmlInputSubmit.cs
- KernelTypeValidation.cs
- MappingException.cs
- FileChangesMonitor.cs
- PrintDialogException.cs
- PageClientProxyGenerator.cs
- FrameworkRichTextComposition.cs
- X509DefaultServiceCertificateElement.cs
- MimeWriter.cs
- ScriptingProfileServiceSection.cs
- SessionPageStateSection.cs
- ChtmlTextWriter.cs