Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Data / System / Data / OleDb / OleDbConnectionFactory.cs / 1 / OleDbConnectionFactory.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.OleDb { using System; using System.Data.Common; using System.Data.ProviderBase; using System.Diagnostics; using System.Collections.Specialized; using System.Configuration; using System.IO; sealed internal class OleDbConnectionFactory : DbConnectionFactory { private OleDbConnectionFactory() : base() {} // At this time, the OleDb Managed Provider doesn't have any connection pool // counters because we'd only confuse people with "non-pooled" connections // that are actually being pooled by the native pooler. private const string _metaDataXml = ":MetaDataXml"; private const string _defaultMetaDataXml = "defaultMetaDataXml"; public static readonly OleDbConnectionFactory SingletonInstance = new OleDbConnectionFactory(); override public DbProviderFactory ProviderFactory { get { return OleDbFactory.Instance; } } override protected DbConnectionInternal CreateConnection(DbConnectionOptions options, object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) { DbConnectionInternal result = new OleDbConnectionInternal((OleDbConnectionString)options, (OleDbConnection)owningObject); return result; } protected override DbConnectionOptions CreateConnectionOptions(string connectionString, DbConnectionOptions previous) { Debug.Assert(!ADP.IsEmpty(connectionString), "null connectionString"); OleDbConnectionString result = new OleDbConnectionString(connectionString, (null != previous)); return result; } override protected DbMetaDataFactory CreateMetaDataFactory(DbConnectionInternal internalConnection, out bool cacheMetaDataFactory){ Debug.Assert (internalConnection != null,"internalConnection may not be null."); cacheMetaDataFactory = false; OleDbConnectionInternal oleDbInternalConnection = (OleDbConnectionInternal) internalConnection; OleDbConnection oleDbOuterConnection = oleDbInternalConnection.Connection; Debug.Assert(oleDbOuterConnection != null,"outer connection may not be null."); NameValueCollection settings = (NameValueCollection)PrivilegedConfigurationManager.GetSection("system.data.oledb"); Stream XMLStream =null; String providerFileName = oleDbOuterConnection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo,ODB.DBPROP_PROVIDERFILENAME) as string; if (settings != null){ string [] values = null; string metaDataXML = null; // first try to get the provider specific xml // if providerfilename is not supported we can't build the settings key needed to // get the provider specific XML path if (providerFileName != null){ metaDataXML = providerFileName + _metaDataXml; values = settings.GetValues(metaDataXML); } // if we did not find provider specific xml see if there is new default xml if (values == null) { metaDataXML =_defaultMetaDataXml; values = settings.GetValues(metaDataXML); } // If there is new XML get it if (values != null) { XMLStream = ADP.GetXmlStreamFromValues(values,metaDataXML); } } // if the xml was not obtained from machine.config use the embedded XML resource if (XMLStream == null) { XMLStream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("System.Data.OleDb.OleDbMetaData.xml"); cacheMetaDataFactory = true; } Debug.Assert (XMLStream != null,"XMLstream may not be null."); // using the ServerVersion as the NormalizedServerVersion. Doing this for two reasons // 1) The Spec for DBPROP_DBMSVER normalizes the ServerVersion // 2) for OLE DB its the only game in town return new OleDbMetaDataFactory (XMLStream, oleDbInternalConnection.ServerVersion, oleDbInternalConnection.ServerVersion, oleDbInternalConnection.GetSchemaRowsetInformation()); } override protected DbConnectionPoolGroupOptions CreateConnectionPoolGroupOptions(DbConnectionOptions connectionOptions) { return null; } override internal DbConnectionPoolGroupProviderInfo CreateConnectionPoolGroupProviderInfo (DbConnectionOptions connectionOptions) { return new OleDbConnectionPoolGroupProviderInfo(); } override internal DbConnectionPoolGroup GetConnectionPoolGroup(DbConnection connection) { OleDbConnection c = (connection as OleDbConnection); if (null != c) { return c.PoolGroup; } return null; } override internal DbConnectionInternal GetInnerConnection(DbConnection connection) { OleDbConnection c = (connection as OleDbConnection); if (null != c) { return c.InnerConnection; } return null; } override protected int GetObjectId(DbConnection connection) { OleDbConnection c = (connection as OleDbConnection); if (null != c) { return c.ObjectID; } return 0; } override internal void PermissionDemand(DbConnection outerConnection) { OleDbConnection c = (outerConnection as OleDbConnection); if (null != c) { c.PermissionDemand(); } } override internal void SetConnectionPoolGroup(DbConnection outerConnection, DbConnectionPoolGroup poolGroup) { OleDbConnection c = (outerConnection as OleDbConnection); if (null != c) { c.PoolGroup = poolGroup; } } override internal void SetInnerConnectionEvent(DbConnection owningObject, DbConnectionInternal to) { OleDbConnection c = (owningObject as OleDbConnection); if (null != c) { c.SetInnerConnectionEvent(to); } } override internal bool SetInnerConnectionFrom(DbConnection owningObject, DbConnectionInternal to, DbConnectionInternal from) { OleDbConnection c = (owningObject as OleDbConnection); if (null != c) { return c.SetInnerConnectionFrom(to, from); } return false; } override internal void SetInnerConnectionTo(DbConnection owningObject, DbConnectionInternal to) { OleDbConnection c = (owningObject as OleDbConnection); if (null != c) { c.SetInnerConnectionTo(to); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.OleDb { using System; using System.Data.Common; using System.Data.ProviderBase; using System.Diagnostics; using System.Collections.Specialized; using System.Configuration; using System.IO; sealed internal class OleDbConnectionFactory : DbConnectionFactory { private OleDbConnectionFactory() : base() {} // At this time, the OleDb Managed Provider doesn't have any connection pool // counters because we'd only confuse people with "non-pooled" connections // that are actually being pooled by the native pooler. private const string _metaDataXml = ":MetaDataXml"; private const string _defaultMetaDataXml = "defaultMetaDataXml"; public static readonly OleDbConnectionFactory SingletonInstance = new OleDbConnectionFactory(); override public DbProviderFactory ProviderFactory { get { return OleDbFactory.Instance; } } override protected DbConnectionInternal CreateConnection(DbConnectionOptions options, object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) { DbConnectionInternal result = new OleDbConnectionInternal((OleDbConnectionString)options, (OleDbConnection)owningObject); return result; } protected override DbConnectionOptions CreateConnectionOptions(string connectionString, DbConnectionOptions previous) { Debug.Assert(!ADP.IsEmpty(connectionString), "null connectionString"); OleDbConnectionString result = new OleDbConnectionString(connectionString, (null != previous)); return result; } override protected DbMetaDataFactory CreateMetaDataFactory(DbConnectionInternal internalConnection, out bool cacheMetaDataFactory){ Debug.Assert (internalConnection != null,"internalConnection may not be null."); cacheMetaDataFactory = false; OleDbConnectionInternal oleDbInternalConnection = (OleDbConnectionInternal) internalConnection; OleDbConnection oleDbOuterConnection = oleDbInternalConnection.Connection; Debug.Assert(oleDbOuterConnection != null,"outer connection may not be null."); NameValueCollection settings = (NameValueCollection)PrivilegedConfigurationManager.GetSection("system.data.oledb"); Stream XMLStream =null; String providerFileName = oleDbOuterConnection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo,ODB.DBPROP_PROVIDERFILENAME) as string; if (settings != null){ string [] values = null; string metaDataXML = null; // first try to get the provider specific xml // if providerfilename is not supported we can't build the settings key needed to // get the provider specific XML path if (providerFileName != null){ metaDataXML = providerFileName + _metaDataXml; values = settings.GetValues(metaDataXML); } // if we did not find provider specific xml see if there is new default xml if (values == null) { metaDataXML =_defaultMetaDataXml; values = settings.GetValues(metaDataXML); } // If there is new XML get it if (values != null) { XMLStream = ADP.GetXmlStreamFromValues(values,metaDataXML); } } // if the xml was not obtained from machine.config use the embedded XML resource if (XMLStream == null) { XMLStream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("System.Data.OleDb.OleDbMetaData.xml"); cacheMetaDataFactory = true; } Debug.Assert (XMLStream != null,"XMLstream may not be null."); // using the ServerVersion as the NormalizedServerVersion. Doing this for two reasons // 1) The Spec for DBPROP_DBMSVER normalizes the ServerVersion // 2) for OLE DB its the only game in town return new OleDbMetaDataFactory (XMLStream, oleDbInternalConnection.ServerVersion, oleDbInternalConnection.ServerVersion, oleDbInternalConnection.GetSchemaRowsetInformation()); } override protected DbConnectionPoolGroupOptions CreateConnectionPoolGroupOptions(DbConnectionOptions connectionOptions) { return null; } override internal DbConnectionPoolGroupProviderInfo CreateConnectionPoolGroupProviderInfo (DbConnectionOptions connectionOptions) { return new OleDbConnectionPoolGroupProviderInfo(); } override internal DbConnectionPoolGroup GetConnectionPoolGroup(DbConnection connection) { OleDbConnection c = (connection as OleDbConnection); if (null != c) { return c.PoolGroup; } return null; } override internal DbConnectionInternal GetInnerConnection(DbConnection connection) { OleDbConnection c = (connection as OleDbConnection); if (null != c) { return c.InnerConnection; } return null; } override protected int GetObjectId(DbConnection connection) { OleDbConnection c = (connection as OleDbConnection); if (null != c) { return c.ObjectID; } return 0; } override internal void PermissionDemand(DbConnection outerConnection) { OleDbConnection c = (outerConnection as OleDbConnection); if (null != c) { c.PermissionDemand(); } } override internal void SetConnectionPoolGroup(DbConnection outerConnection, DbConnectionPoolGroup poolGroup) { OleDbConnection c = (outerConnection as OleDbConnection); if (null != c) { c.PoolGroup = poolGroup; } } override internal void SetInnerConnectionEvent(DbConnection owningObject, DbConnectionInternal to) { OleDbConnection c = (owningObject as OleDbConnection); if (null != c) { c.SetInnerConnectionEvent(to); } } override internal bool SetInnerConnectionFrom(DbConnection owningObject, DbConnectionInternal to, DbConnectionInternal from) { OleDbConnection c = (owningObject as OleDbConnection); if (null != c) { return c.SetInnerConnectionFrom(to, from); } return false; } override internal void SetInnerConnectionTo(DbConnection owningObject, DbConnectionInternal to) { OleDbConnection c = (owningObject as OleDbConnection); if (null != c) { c.SetInnerConnectionTo(to); } } } } // 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
- Activity.cs
- GZipUtils.cs
- Model3D.cs
- ReservationCollection.cs
- PKCS1MaskGenerationMethod.cs
- XmlEventCache.cs
- RoleManagerEventArgs.cs
- DataError.cs
- RuntimeConfig.cs
- StylusPlugInCollection.cs
- PolicyException.cs
- XmlSchemaException.cs
- UriSection.cs
- SqlBulkCopyColumnMapping.cs
- JavaScriptString.cs
- ProtocolsConfigurationEntry.cs
- CodeCompileUnit.cs
- Utility.cs
- SetIterators.cs
- HostedTransportConfigurationManager.cs
- ExpandSegmentCollection.cs
- DbMetaDataFactory.cs
- EventLogTraceListener.cs
- AttributeTable.cs
- Variant.cs
- MulticastOption.cs
- PrintingPermissionAttribute.cs
- wgx_exports.cs
- PropertyItem.cs
- ResourceReader.cs
- NullableFloatMinMaxAggregationOperator.cs
- EmptyReadOnlyDictionaryInternal.cs
- XmlDataDocument.cs
- DataTableClearEvent.cs
- ColorConverter.cs
- TriState.cs
- RawTextInputReport.cs
- X509CertificateValidator.cs
- BitmapMetadata.cs
- DigitalSignature.cs
- TypeSystem.cs
- AnnotationResourceCollection.cs
- MachineKeyConverter.cs
- externdll.cs
- XmlCountingReader.cs
- ProxySimple.cs
- PkcsUtils.cs
- BitHelper.cs
- JoinQueryOperator.cs
- input.cs
- UrlPropertyAttribute.cs
- RecommendedAsConfigurableAttribute.cs
- ColumnPropertiesGroup.cs
- Input.cs
- SqlClientWrapperSmiStreamChars.cs
- Pkcs7Signer.cs
- SamlConstants.cs
- ObjectConverter.cs
- SqlProviderServices.cs
- StrokeCollection2.cs
- ShaderEffect.cs
- AssemblyCacheEntry.cs
- FixUpCollection.cs
- LabelLiteral.cs
- EnumerableValidator.cs
- ListItemCollection.cs
- XmlBinaryReader.cs
- LinkedList.cs
- Overlapped.cs
- DetailsViewInsertedEventArgs.cs
- LOSFormatter.cs
- CodeAccessPermission.cs
- DataGridCaption.cs
- MatrixCamera.cs
- DefaultAsyncDataDispatcher.cs
- EpmSourcePathSegment.cs
- PeerObject.cs
- initElementDictionary.cs
- OdbcConnectionOpen.cs
- MemberAssignment.cs
- ScrollBar.cs
- XmlTypeAttribute.cs
- GeneralTransformGroup.cs
- SymmetricSecurityBindingElement.cs
- SmiRequestExecutor.cs
- HashCodeCombiner.cs
- HebrewNumber.cs
- SectionUpdates.cs
- DataGridViewCellValidatingEventArgs.cs
- ReplacementText.cs
- SocketManager.cs
- Multiply.cs
- FirstMatchCodeGroup.cs
- UIAgentInitializationException.cs
- Decimal.cs
- ChildTable.cs
- Line.cs
- CipherData.cs
- ContextMarshalException.cs
- SecurityContext.cs