Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Common / DBSchemaTable.cs / 1305376 / DBSchemaTable.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Data; using System.Data.ProviderBase; using System.Diagnostics; sealed internal class DbSchemaTable { private enum ColumnEnum { ColumnName, ColumnOrdinal, ColumnSize, BaseServerName, BaseCatalogName, BaseColumnName, BaseSchemaName, BaseTableName, IsAutoIncrement, IsUnique, IsKey, IsRowVersion, DataType, ProviderSpecificDataType, AllowDBNull, ProviderType, IsExpression, IsHidden, IsLong, IsReadOnly, SchemaMappingUnsortedIndex, } static readonly private string[] DBCOLUMN_NAME = new string[] { SchemaTableColumn.ColumnName, SchemaTableColumn.ColumnOrdinal, SchemaTableColumn.ColumnSize, SchemaTableOptionalColumn.BaseServerName, SchemaTableOptionalColumn.BaseCatalogName, SchemaTableColumn.BaseColumnName, SchemaTableColumn.BaseSchemaName, SchemaTableColumn.BaseTableName, SchemaTableOptionalColumn.IsAutoIncrement, SchemaTableColumn.IsUnique, SchemaTableColumn.IsKey, SchemaTableOptionalColumn.IsRowVersion, SchemaTableColumn.DataType, SchemaTableOptionalColumn.ProviderSpecificDataType, SchemaTableColumn.AllowDBNull, SchemaTableColumn.ProviderType, SchemaTableColumn.IsExpression, SchemaTableOptionalColumn.IsHidden, SchemaTableColumn.IsLong, SchemaTableOptionalColumn.IsReadOnly, DbSchemaRow.SchemaMappingUnsortedIndex, }; internal DataTable dataTable; private DataColumnCollection columns; private DataColumn[] columnCache = new DataColumn[DBCOLUMN_NAME.Length]; private bool _returnProviderSpecificTypes; internal DbSchemaTable(DataTable dataTable, bool returnProviderSpecificTypes) { this.dataTable = dataTable; this.columns = dataTable.Columns; _returnProviderSpecificTypes = returnProviderSpecificTypes; } internal DataColumn ColumnName { get { return CachedDataColumn(ColumnEnum.ColumnName);}} internal DataColumn Size { get { return CachedDataColumn(ColumnEnum.ColumnSize);}} internal DataColumn BaseServerName { get { return CachedDataColumn(ColumnEnum.BaseServerName);}} internal DataColumn BaseColumnName { get { return CachedDataColumn(ColumnEnum.BaseColumnName);}} internal DataColumn BaseTableName { get { return CachedDataColumn(ColumnEnum.BaseTableName);}} internal DataColumn BaseCatalogName { get { return CachedDataColumn(ColumnEnum.BaseCatalogName);}} internal DataColumn BaseSchemaName { get { return CachedDataColumn(ColumnEnum.BaseSchemaName);}} internal DataColumn IsAutoIncrement { get { return CachedDataColumn(ColumnEnum.IsAutoIncrement);}} internal DataColumn IsUnique { get { return CachedDataColumn(ColumnEnum.IsUnique);}} internal DataColumn IsKey { get { return CachedDataColumn(ColumnEnum.IsKey);}} internal DataColumn IsRowVersion { get { return CachedDataColumn(ColumnEnum.IsRowVersion);}} internal DataColumn AllowDBNull { get { return CachedDataColumn(ColumnEnum.AllowDBNull);}} internal DataColumn IsExpression { get { return CachedDataColumn(ColumnEnum.IsExpression);}} internal DataColumn IsHidden { get { return CachedDataColumn(ColumnEnum.IsHidden);}} internal DataColumn IsLong { get { return CachedDataColumn(ColumnEnum.IsLong);}} internal DataColumn IsReadOnly { get { return CachedDataColumn(ColumnEnum.IsReadOnly);}} internal DataColumn UnsortedIndex { get { return CachedDataColumn(ColumnEnum.SchemaMappingUnsortedIndex);}} internal DataColumn DataType { get { if (_returnProviderSpecificTypes) { return CachedDataColumn(ColumnEnum.ProviderSpecificDataType, ColumnEnum.DataType); } return CachedDataColumn(ColumnEnum.DataType); } } private DataColumn CachedDataColumn(ColumnEnum column) { return CachedDataColumn(column, column); } private DataColumn CachedDataColumn(ColumnEnum column, ColumnEnum column2) { DataColumn dataColumn = columnCache[(int) column]; if (null == dataColumn) { int index = columns.IndexOf(DBCOLUMN_NAME[(int) column]); if ((-1 == index) && (column != column2)) { index = columns.IndexOf(DBCOLUMN_NAME[(int) column2]); } if (-1 != index) { dataColumn = columns[index]; columnCache[(int) column] = dataColumn; } } return dataColumn; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Data; using System.Data.ProviderBase; using System.Diagnostics; sealed internal class DbSchemaTable { private enum ColumnEnum { ColumnName, ColumnOrdinal, ColumnSize, BaseServerName, BaseCatalogName, BaseColumnName, BaseSchemaName, BaseTableName, IsAutoIncrement, IsUnique, IsKey, IsRowVersion, DataType, ProviderSpecificDataType, AllowDBNull, ProviderType, IsExpression, IsHidden, IsLong, IsReadOnly, SchemaMappingUnsortedIndex, } static readonly private string[] DBCOLUMN_NAME = new string[] { SchemaTableColumn.ColumnName, SchemaTableColumn.ColumnOrdinal, SchemaTableColumn.ColumnSize, SchemaTableOptionalColumn.BaseServerName, SchemaTableOptionalColumn.BaseCatalogName, SchemaTableColumn.BaseColumnName, SchemaTableColumn.BaseSchemaName, SchemaTableColumn.BaseTableName, SchemaTableOptionalColumn.IsAutoIncrement, SchemaTableColumn.IsUnique, SchemaTableColumn.IsKey, SchemaTableOptionalColumn.IsRowVersion, SchemaTableColumn.DataType, SchemaTableOptionalColumn.ProviderSpecificDataType, SchemaTableColumn.AllowDBNull, SchemaTableColumn.ProviderType, SchemaTableColumn.IsExpression, SchemaTableOptionalColumn.IsHidden, SchemaTableColumn.IsLong, SchemaTableOptionalColumn.IsReadOnly, DbSchemaRow.SchemaMappingUnsortedIndex, }; internal DataTable dataTable; private DataColumnCollection columns; private DataColumn[] columnCache = new DataColumn[DBCOLUMN_NAME.Length]; private bool _returnProviderSpecificTypes; internal DbSchemaTable(DataTable dataTable, bool returnProviderSpecificTypes) { this.dataTable = dataTable; this.columns = dataTable.Columns; _returnProviderSpecificTypes = returnProviderSpecificTypes; } internal DataColumn ColumnName { get { return CachedDataColumn(ColumnEnum.ColumnName);}} internal DataColumn Size { get { return CachedDataColumn(ColumnEnum.ColumnSize);}} internal DataColumn BaseServerName { get { return CachedDataColumn(ColumnEnum.BaseServerName);}} internal DataColumn BaseColumnName { get { return CachedDataColumn(ColumnEnum.BaseColumnName);}} internal DataColumn BaseTableName { get { return CachedDataColumn(ColumnEnum.BaseTableName);}} internal DataColumn BaseCatalogName { get { return CachedDataColumn(ColumnEnum.BaseCatalogName);}} internal DataColumn BaseSchemaName { get { return CachedDataColumn(ColumnEnum.BaseSchemaName);}} internal DataColumn IsAutoIncrement { get { return CachedDataColumn(ColumnEnum.IsAutoIncrement);}} internal DataColumn IsUnique { get { return CachedDataColumn(ColumnEnum.IsUnique);}} internal DataColumn IsKey { get { return CachedDataColumn(ColumnEnum.IsKey);}} internal DataColumn IsRowVersion { get { return CachedDataColumn(ColumnEnum.IsRowVersion);}} internal DataColumn AllowDBNull { get { return CachedDataColumn(ColumnEnum.AllowDBNull);}} internal DataColumn IsExpression { get { return CachedDataColumn(ColumnEnum.IsExpression);}} internal DataColumn IsHidden { get { return CachedDataColumn(ColumnEnum.IsHidden);}} internal DataColumn IsLong { get { return CachedDataColumn(ColumnEnum.IsLong);}} internal DataColumn IsReadOnly { get { return CachedDataColumn(ColumnEnum.IsReadOnly);}} internal DataColumn UnsortedIndex { get { return CachedDataColumn(ColumnEnum.SchemaMappingUnsortedIndex);}} internal DataColumn DataType { get { if (_returnProviderSpecificTypes) { return CachedDataColumn(ColumnEnum.ProviderSpecificDataType, ColumnEnum.DataType); } return CachedDataColumn(ColumnEnum.DataType); } } private DataColumn CachedDataColumn(ColumnEnum column) { return CachedDataColumn(column, column); } private DataColumn CachedDataColumn(ColumnEnum column, ColumnEnum column2) { DataColumn dataColumn = columnCache[(int) column]; if (null == dataColumn) { int index = columns.IndexOf(DBCOLUMN_NAME[(int) column]); if ((-1 == index) && (column != column2)) { index = columns.IndexOf(DBCOLUMN_NAME[(int) column2]); } if (-1 != index) { dataColumn = columns[index]; columnCache[(int) column] = dataColumn; } } return dataColumn; } } } // 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
- DbConnectionPoolCounters.cs
- UnsafeNativeMethods.cs
- TransactionValidationBehavior.cs
- FixedSchema.cs
- NameObjectCollectionBase.cs
- CompositeActivityValidator.cs
- SamlSubject.cs
- MessageDecoder.cs
- FunctionImportMapping.cs
- DataViewManager.cs
- QuotedPairReader.cs
- StringAnimationUsingKeyFrames.cs
- XPathDocumentNavigator.cs
- RtfToXamlReader.cs
- XmlSchemaComplexContentRestriction.cs
- ColumnMap.cs
- ObjectQuery.cs
- CommandHelpers.cs
- MsmqIntegrationMessageProperty.cs
- DesignerTransaction.cs
- translator.cs
- XsdBuildProvider.cs
- MetadataUtil.cs
- ControlIdConverter.cs
- TypeUtil.cs
- CodeCatchClause.cs
- AbstractExpressions.cs
- WebBaseEventKeyComparer.cs
- PriorityQueue.cs
- CodeTypeDeclarationCollection.cs
- GridItemCollection.cs
- BamlResourceDeserializer.cs
- TrackBar.cs
- GenericRootAutomationPeer.cs
- ConfigXmlAttribute.cs
- HtmlButton.cs
- HttpModuleAction.cs
- PointConverter.cs
- XPathSelectionIterator.cs
- httpserverutility.cs
- XmlAnyElementAttributes.cs
- OutputCacheProfile.cs
- ScopeCompiler.cs
- CryptoProvider.cs
- ProcessModelSection.cs
- RectangleConverter.cs
- GridViewColumnCollection.cs
- Int32Converter.cs
- InputLanguage.cs
- ThaiBuddhistCalendar.cs
- ProfilePropertySettingsCollection.cs
- ReliabilityContractAttribute.cs
- EntityDataSourceState.cs
- PipeSecurity.cs
- FieldNameLookup.cs
- RegexTree.cs
- DrawingImage.cs
- Proxy.cs
- serverconfig.cs
- COM2ColorConverter.cs
- FontFamilyValueSerializer.cs
- EtwTrackingBehaviorElement.cs
- AuthenticationManager.cs
- EnumConverter.cs
- AssemblyCollection.cs
- CapabilitiesAssignment.cs
- KnownIds.cs
- PageParser.cs
- VisualStates.cs
- CookielessHelper.cs
- Dispatcher.cs
- CodeMemberMethod.cs
- SecurityTokenRequirement.cs
- ResourcePermissionBase.cs
- SafeRightsManagementSessionHandle.cs
- SessionSwitchEventArgs.cs
- KeyPressEvent.cs
- Math.cs
- SafeReversePInvokeHandle.cs
- PackageDigitalSignatureManager.cs
- RelationshipFixer.cs
- EventSourceCreationData.cs
- TransportSecurityProtocolFactory.cs
- HttpCookiesSection.cs
- QueryInterceptorAttribute.cs
- GeneralTransformCollection.cs
- WindowsSlider.cs
- ComponentDispatcherThread.cs
- Metafile.cs
- CheckBoxField.cs
- UnsafePeerToPeerMethods.cs
- ProviderSettings.cs
- TextTreeExtractElementUndoUnit.cs
- StateMachine.cs
- TrailingSpaceComparer.cs
- HtmlShim.cs
- ThreadAbortException.cs
- SqlStatistics.cs
- MILUtilities.cs
- DataServiceRequest.cs