Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Common / Utils / CommandHelper.cs / 3 / CommandHelper.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Diagnostics; using System.Data.Metadata.Edm; using System.Data.EntityClient; using System.Data.Objects; namespace System.Data.Common.Utils { ////// Contains utility methods for construction of DB commands through generic /// provider interfaces. /// internal static class CommandHelper { ////// Consumes all rows and result sets from the reader. This allows client to retrieve /// parameter values and intercept any store exceptions. /// /// reader to consume internal static void ConsumeReader(DbDataReader reader) { if (null != reader && !reader.IsClosed) { while (reader.NextResult()) { // Note that we only walk through the result sets. We don't need // to walk through individual rows (though underlying provider // implementation may do so) } } } ////// requires: commandText must not be null /// The command text must be in the form Container.FunctionImportName. /// internal static void ParseFunctionImportCommandText(string commandText, string defaultContainerName, out string containerName, out string functionImportName) { Debug.Assert(null != commandText); // Split the string string[] nameParts = commandText.Split('.'); containerName = null; functionImportName = null; if (2 == nameParts.Length) { containerName = nameParts[0].Trim(); functionImportName = nameParts[1].Trim(); } else if (1 == nameParts.Length && null != defaultContainerName) { containerName = defaultContainerName; functionImportName = nameParts[0].Trim(); } if (string.IsNullOrEmpty(containerName) || string.IsNullOrEmpty(functionImportName)) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_InvalidStoredProcedureCommandText); } } ////// Given an entity command, returns the associated entity transaction and performs validation /// to ensure the transaction is consistent. /// /// Entity command instance. Must not be null. ///Entity transaction internal static EntityTransaction GetEntityTransaction(EntityCommand entityCommand) { Debug.Assert(null != entityCommand); EntityTransaction entityTransaction = (EntityTransaction)entityCommand.Transaction; // Check to make sure that either the command has no transaction associated with it, or it // matches the one used by the connection if (entityTransaction != null && entityTransaction != entityCommand.Connection.CurrentTransaction) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_InvalidTransactionForCommand); } // Now we have asserted that EntityCommand either has no transaction or has one that matches the // one used in the connection, we can simply use the connection's transaction object entityTransaction = entityCommand.Connection.CurrentTransaction; return entityTransaction; } ////// Given an entity command and entity transaction, passes through relevant state to store provider /// command. /// /// Entity command. Must not be null. /// Entity transaction. Must not be null. /// Store provider command that is being setup. Must not be null. internal static void SetStoreProviderCommandState(EntityCommand entityCommand, EntityTransaction entityTransaction, DbCommand storeProviderCommand) { Debug.Assert(null != entityCommand); Debug.Assert(null != storeProviderCommand); storeProviderCommand.CommandTimeout = entityCommand.CommandTimeout; storeProviderCommand.Connection = ((EntityConnection)entityCommand.Connection).StoreConnection; storeProviderCommand.Transaction = (null != entityTransaction) ? entityTransaction.StoreTransaction : null; storeProviderCommand.UpdatedRowSource = entityCommand.UpdatedRowSource; } ////// Given an entity command and store provider command, sets all output parameter values on the entity command. /// /// Entity command on which to set parameter values. Must not be null. /// Store provider command from which to retrieve parameter values. Must not /// be null. internal static void SetEntityParameterValues(EntityCommand entityCommand, DbCommand storeProviderCommand) { Debug.Assert(null != entityCommand); Debug.Assert(null != storeProviderCommand); foreach (DbParameter storeParameter in storeProviderCommand.Parameters) { ParameterDirection direction = storeParameter.Direction; if (0 != (direction & ParameterDirection.Output)) { // if the entity command also defines the parameter, propagate store parameter value // to entity parameter int parameterOrdinal = entityCommand.Parameters.IndexOf(storeParameter.ParameterName); if (0 <= parameterOrdinal) { EntityParameter entityParameter = entityCommand.Parameters[parameterOrdinal]; entityParameter.Value = storeParameter.Value; } } } } // requires: all arguments must be given internal static EdmFunction FindFunctionImport(MetadataWorkspace workspace, string containerName, string functionImportName) { Debug.Assert(null != workspace && null != containerName && null != functionImportName); // find entity container EntityContainer entityContainer; if (!workspace.TryGetEntityContainer(containerName, DataSpace.CSpace, out entityContainer)) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_UnableToFindFunctionImportContainer( containerName)); } // find function import EdmFunction functionImport = null; foreach (EdmFunction candidate in entityContainer.FunctionImports) { if (candidate.Name == functionImportName) { functionImport = candidate; break; } } if (null == functionImport) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_UnableToFindFunctionImport( containerName, functionImportName)); } return functionImport; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Diagnostics; using System.Data.Metadata.Edm; using System.Data.EntityClient; using System.Data.Objects; namespace System.Data.Common.Utils { ////// Contains utility methods for construction of DB commands through generic /// provider interfaces. /// internal static class CommandHelper { ////// Consumes all rows and result sets from the reader. This allows client to retrieve /// parameter values and intercept any store exceptions. /// /// reader to consume internal static void ConsumeReader(DbDataReader reader) { if (null != reader && !reader.IsClosed) { while (reader.NextResult()) { // Note that we only walk through the result sets. We don't need // to walk through individual rows (though underlying provider // implementation may do so) } } } ////// requires: commandText must not be null /// The command text must be in the form Container.FunctionImportName. /// internal static void ParseFunctionImportCommandText(string commandText, string defaultContainerName, out string containerName, out string functionImportName) { Debug.Assert(null != commandText); // Split the string string[] nameParts = commandText.Split('.'); containerName = null; functionImportName = null; if (2 == nameParts.Length) { containerName = nameParts[0].Trim(); functionImportName = nameParts[1].Trim(); } else if (1 == nameParts.Length && null != defaultContainerName) { containerName = defaultContainerName; functionImportName = nameParts[0].Trim(); } if (string.IsNullOrEmpty(containerName) || string.IsNullOrEmpty(functionImportName)) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_InvalidStoredProcedureCommandText); } } ////// Given an entity command, returns the associated entity transaction and performs validation /// to ensure the transaction is consistent. /// /// Entity command instance. Must not be null. ///Entity transaction internal static EntityTransaction GetEntityTransaction(EntityCommand entityCommand) { Debug.Assert(null != entityCommand); EntityTransaction entityTransaction = (EntityTransaction)entityCommand.Transaction; // Check to make sure that either the command has no transaction associated with it, or it // matches the one used by the connection if (entityTransaction != null && entityTransaction != entityCommand.Connection.CurrentTransaction) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_InvalidTransactionForCommand); } // Now we have asserted that EntityCommand either has no transaction or has one that matches the // one used in the connection, we can simply use the connection's transaction object entityTransaction = entityCommand.Connection.CurrentTransaction; return entityTransaction; } ////// Given an entity command and entity transaction, passes through relevant state to store provider /// command. /// /// Entity command. Must not be null. /// Entity transaction. Must not be null. /// Store provider command that is being setup. Must not be null. internal static void SetStoreProviderCommandState(EntityCommand entityCommand, EntityTransaction entityTransaction, DbCommand storeProviderCommand) { Debug.Assert(null != entityCommand); Debug.Assert(null != storeProviderCommand); storeProviderCommand.CommandTimeout = entityCommand.CommandTimeout; storeProviderCommand.Connection = ((EntityConnection)entityCommand.Connection).StoreConnection; storeProviderCommand.Transaction = (null != entityTransaction) ? entityTransaction.StoreTransaction : null; storeProviderCommand.UpdatedRowSource = entityCommand.UpdatedRowSource; } ////// Given an entity command and store provider command, sets all output parameter values on the entity command. /// /// Entity command on which to set parameter values. Must not be null. /// Store provider command from which to retrieve parameter values. Must not /// be null. internal static void SetEntityParameterValues(EntityCommand entityCommand, DbCommand storeProviderCommand) { Debug.Assert(null != entityCommand); Debug.Assert(null != storeProviderCommand); foreach (DbParameter storeParameter in storeProviderCommand.Parameters) { ParameterDirection direction = storeParameter.Direction; if (0 != (direction & ParameterDirection.Output)) { // if the entity command also defines the parameter, propagate store parameter value // to entity parameter int parameterOrdinal = entityCommand.Parameters.IndexOf(storeParameter.ParameterName); if (0 <= parameterOrdinal) { EntityParameter entityParameter = entityCommand.Parameters[parameterOrdinal]; entityParameter.Value = storeParameter.Value; } } } } // requires: all arguments must be given internal static EdmFunction FindFunctionImport(MetadataWorkspace workspace, string containerName, string functionImportName) { Debug.Assert(null != workspace && null != containerName && null != functionImportName); // find entity container EntityContainer entityContainer; if (!workspace.TryGetEntityContainer(containerName, DataSpace.CSpace, out entityContainer)) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_UnableToFindFunctionImportContainer( containerName)); } // find function import EdmFunction functionImport = null; foreach (EdmFunction candidate in entityContainer.FunctionImports) { if (candidate.Name == functionImportName) { functionImport = candidate; break; } } if (null == functionImport) { throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.EntityClient_UnableToFindFunctionImport( containerName, functionImportName)); } return functionImport; } } } // 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
- HandleExceptionArgs.cs
- XmlValidatingReader.cs
- RelationshipConstraintValidator.cs
- HostUtils.cs
- InvalidProgramException.cs
- SecurityAlgorithmSuiteConverter.cs
- OleDbSchemaGuid.cs
- ItemChangedEventArgs.cs
- ResourcePool.cs
- Debug.cs
- ClientSettingsProvider.cs
- ServiceProviders.cs
- PeerToPeerException.cs
- AttributeCollection.cs
- TextFindEngine.cs
- ClientCredentialsSecurityTokenManager.cs
- TrackingExtract.cs
- WindowCollection.cs
- HtmlImage.cs
- AudioFormatConverter.cs
- CanonicalizationDriver.cs
- ExpressionBuilderContext.cs
- WebPartActionVerb.cs
- MatrixCamera.cs
- connectionpool.cs
- AssemblySettingAttributes.cs
- MSG.cs
- Component.cs
- WebPartsPersonalizationAuthorization.cs
- PanelStyle.cs
- DefaultValueTypeConverter.cs
- PartialArray.cs
- ListBase.cs
- MSHTMLHost.cs
- AtomContentProperty.cs
- TransformerTypeCollection.cs
- ComponentGuaranteesAttribute.cs
- ValueExpressions.cs
- UpDownBase.cs
- WebPartConnectVerb.cs
- CompilerErrorCollection.cs
- mda.cs
- infer.cs
- ToolStripScrollButton.cs
- InfoCardTrace.cs
- StylusCaptureWithinProperty.cs
- GenericQueueSurrogate.cs
- _HeaderInfoTable.cs
- ScriptManager.cs
- HighContrastHelper.cs
- HierarchicalDataTemplate.cs
- AttachedPropertyBrowsableForTypeAttribute.cs
- Version.cs
- FactoryMaker.cs
- SafeProcessHandle.cs
- InputLanguageEventArgs.cs
- EntryPointNotFoundException.cs
- ConfigXmlAttribute.cs
- EventsTab.cs
- CalendarItem.cs
- CalendarDayButton.cs
- PolicyUnit.cs
- FileDialogCustomPlacesCollection.cs
- ObjectQuery.cs
- NavigationCommands.cs
- followingsibling.cs
- EdmFunctions.cs
- BitmapEffectGroup.cs
- DBBindings.cs
- NullToBooleanConverter.cs
- X509ChainElement.cs
- PolyQuadraticBezierSegment.cs
- WmfPlaceableFileHeader.cs
- ECDiffieHellmanCngPublicKey.cs
- XmlUrlResolver.cs
- NumberFormatter.cs
- ToggleButtonAutomationPeer.cs
- PowerModeChangedEventArgs.cs
- GeneralTransform.cs
- FamilyTypefaceCollection.cs
- DataServiceConfiguration.cs
- Parser.cs
- SignatureHelper.cs
- TransformProviderWrapper.cs
- ADConnectionHelper.cs
- Random.cs
- WindowsRichEditRange.cs
- Stroke2.cs
- TextProperties.cs
- RuleRefElement.cs
- CodePropertyReferenceExpression.cs
- CustomAssemblyResolver.cs
- TimelineCollection.cs
- DynamicILGenerator.cs
- BitStream.cs
- RemotingConfiguration.cs
- OdbcUtils.cs
- CommandConverter.cs
- ObjectQuery.cs
- ProfilePropertyNameValidator.cs