Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Objects / DataRecordObjectView.cs / 1 / DataRecordObjectView.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner jhutson // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data.Common; using System.Data.Metadata; using System.Data.Metadata.Edm; using System.Reflection; namespace System.Data.Objects { ////// ObjectView that provides binding to a list of data records. /// ////// This class provides an implementation of ITypedList that returns property descriptors /// for each column of results in a data record. /// internal sealed class DataRecordObjectView : ObjectView, ITypedList { /// /// Cache of the property descriptors for the element type of the root list wrapped by ObjectView. /// private PropertyDescriptorCollection _propertyDescriptorsCache; ////// EDM RowType that describes the shape of record elements. /// private RowType _rowType; internal DataRecordObjectView(IObjectViewDataviewData, object eventDataSource, RowType rowType, Type propertyComponentType) : base(viewData, eventDataSource) { if (!typeof(IDataRecord).IsAssignableFrom(propertyComponentType)) { propertyComponentType = typeof(IDataRecord); } _rowType = rowType; _propertyDescriptorsCache = MaterializedDataRecord.CreatePropertyDescriptorCollection(_rowType, propertyComponentType, true); } /// /// Return a /// ///instance that represents /// a strongly-typed indexer property on the specified type. /// that may define the appropriate indexer. /// /// /// ///instance of indexer defined on supplied type /// that returns an object of any type but ; /// or null if no such indexer is defined on the supplied type. /// /// The algorithm here is lifted from System.Windows.Forms.ListBindingHelper, /// from the GetTypedIndexer method. /// The Entity Framework could not take a dependency on WinForms, /// so we lifted the appropriate parts from the WinForms code here. /// A bit ----, but much better than guessing as to what algorithm is proper for data binding. /// private static PropertyInfo GetTypedIndexer(Type type) { PropertyInfo indexer = null; if (typeof(IList).IsAssignableFrom(type) || typeof(ITypedList).IsAssignableFrom(type) || typeof(IListSource).IsAssignableFrom(type)) { System.Reflection.PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance); for (int idx = 0; idx < props.Length; idx++) { if (props[idx].GetIndexParameters().Length > 0 && props[idx].PropertyType != typeof(object)) { indexer = props[idx]; //Prefer the standard indexer, if there is one if (indexer.Name == "Item") { break; } } } } return indexer; } ////// Return the element type for the supplied type. /// /// ////// If ///represents a list type that doesn't also implement ITypedList or IListSource, /// return the element type for items in that list. /// Otherwise, return the type supplied by . /// /// The algorithm here is lifted from System.Windows.Forms.ListBindingHelper, /// from the GetListItemType(object) method. /// The Entity Framework could not take a dependency on WinForms, /// so we lifted the appropriate parts from the WinForms code here. /// A bit ----, but much better than guessing as to what algorithm is proper for data binding. /// private static Type GetListItemType(Type type) { Type itemType; if (typeof(Array).IsAssignableFrom(type)) { itemType = type.GetElementType(); } else { PropertyInfo typedIndexer = GetTypedIndexer(type); if (typedIndexer != null) { itemType = typedIndexer.PropertyType; } else { itemType = type; } } return itemType; } #region ITypedList Members PropertyDescriptorCollection System.ComponentModel.ITypedList.GetItemProperties(PropertyDescriptor[] listAccessors) { PropertyDescriptorCollection propertyDescriptors; if (listAccessors == null || listAccessors.Length == 0) { // Caller is requesting property descriptors for the root element type. propertyDescriptors = _propertyDescriptorsCache; } else { // Use the last PropertyDescriptor in the array to build the collection of returned property descriptors. PropertyDescriptor propertyDescriptor = listAccessors[listAccessors.Length - 1]; FieldDescriptor fieldDescriptor = propertyDescriptor as FieldDescriptor; // If the property descriptor describes a data record with the EDM type of RowType, // construct the collection of property descriptors from the property's EDM metadata. // Otherwise use the CLR type of the property. if (fieldDescriptor != null && fieldDescriptor.EdmProperty != null && fieldDescriptor.EdmProperty.TypeUsage.EdmType.BuiltInTypeKind == BuiltInTypeKind.RowType) { // Retrieve property descriptors from EDM metadata. propertyDescriptors = MaterializedDataRecord.CreatePropertyDescriptorCollection((RowType)fieldDescriptor.EdmProperty.TypeUsage.EdmType, typeof(IDataRecord), true); } else { // Use the CLR type. propertyDescriptors = TypeDescriptor.GetProperties(GetListItemType(propertyDescriptor.PropertyType)); } } return propertyDescriptors; } string System.ComponentModel.ITypedList.GetListName(PropertyDescriptor[] listAccessors) { return _rowType.Name; } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner jhutson // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data.Common; using System.Data.Metadata; using System.Data.Metadata.Edm; using System.Reflection; namespace System.Data.Objects { ////// ObjectView that provides binding to a list of data records. /// ////// This class provides an implementation of ITypedList that returns property descriptors /// for each column of results in a data record. /// internal sealed class DataRecordObjectView : ObjectView, ITypedList { /// /// Cache of the property descriptors for the element type of the root list wrapped by ObjectView. /// private PropertyDescriptorCollection _propertyDescriptorsCache; ////// EDM RowType that describes the shape of record elements. /// private RowType _rowType; internal DataRecordObjectView(IObjectViewDataviewData, object eventDataSource, RowType rowType, Type propertyComponentType) : base(viewData, eventDataSource) { if (!typeof(IDataRecord).IsAssignableFrom(propertyComponentType)) { propertyComponentType = typeof(IDataRecord); } _rowType = rowType; _propertyDescriptorsCache = MaterializedDataRecord.CreatePropertyDescriptorCollection(_rowType, propertyComponentType, true); } /// /// Return a /// ///instance that represents /// a strongly-typed indexer property on the specified type. /// that may define the appropriate indexer. /// /// /// ///instance of indexer defined on supplied type /// that returns an object of any type but ; /// or null if no such indexer is defined on the supplied type. /// /// The algorithm here is lifted from System.Windows.Forms.ListBindingHelper, /// from the GetTypedIndexer method. /// The Entity Framework could not take a dependency on WinForms, /// so we lifted the appropriate parts from the WinForms code here. /// A bit ----, but much better than guessing as to what algorithm is proper for data binding. /// private static PropertyInfo GetTypedIndexer(Type type) { PropertyInfo indexer = null; if (typeof(IList).IsAssignableFrom(type) || typeof(ITypedList).IsAssignableFrom(type) || typeof(IListSource).IsAssignableFrom(type)) { System.Reflection.PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance); for (int idx = 0; idx < props.Length; idx++) { if (props[idx].GetIndexParameters().Length > 0 && props[idx].PropertyType != typeof(object)) { indexer = props[idx]; //Prefer the standard indexer, if there is one if (indexer.Name == "Item") { break; } } } } return indexer; } ////// Return the element type for the supplied type. /// /// ////// If ///represents a list type that doesn't also implement ITypedList or IListSource, /// return the element type for items in that list. /// Otherwise, return the type supplied by . /// /// The algorithm here is lifted from System.Windows.Forms.ListBindingHelper, /// from the GetListItemType(object) method. /// The Entity Framework could not take a dependency on WinForms, /// so we lifted the appropriate parts from the WinForms code here. /// A bit ----, but much better than guessing as to what algorithm is proper for data binding. /// private static Type GetListItemType(Type type) { Type itemType; if (typeof(Array).IsAssignableFrom(type)) { itemType = type.GetElementType(); } else { PropertyInfo typedIndexer = GetTypedIndexer(type); if (typedIndexer != null) { itemType = typedIndexer.PropertyType; } else { itemType = type; } } return itemType; } #region ITypedList Members PropertyDescriptorCollection System.ComponentModel.ITypedList.GetItemProperties(PropertyDescriptor[] listAccessors) { PropertyDescriptorCollection propertyDescriptors; if (listAccessors == null || listAccessors.Length == 0) { // Caller is requesting property descriptors for the root element type. propertyDescriptors = _propertyDescriptorsCache; } else { // Use the last PropertyDescriptor in the array to build the collection of returned property descriptors. PropertyDescriptor propertyDescriptor = listAccessors[listAccessors.Length - 1]; FieldDescriptor fieldDescriptor = propertyDescriptor as FieldDescriptor; // If the property descriptor describes a data record with the EDM type of RowType, // construct the collection of property descriptors from the property's EDM metadata. // Otherwise use the CLR type of the property. if (fieldDescriptor != null && fieldDescriptor.EdmProperty != null && fieldDescriptor.EdmProperty.TypeUsage.EdmType.BuiltInTypeKind == BuiltInTypeKind.RowType) { // Retrieve property descriptors from EDM metadata. propertyDescriptors = MaterializedDataRecord.CreatePropertyDescriptorCollection((RowType)fieldDescriptor.EdmProperty.TypeUsage.EdmType, typeof(IDataRecord), true); } else { // Use the CLR type. propertyDescriptors = TypeDescriptor.GetProperties(GetListItemType(propertyDescriptor.PropertyType)); } } return propertyDescriptors; } string System.ComponentModel.ITypedList.GetListName(PropertyDescriptor[] listAccessors) { return _rowType.Name; } #endregion } } // 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
- DeclarativeCatalogPart.cs
- DataGridPageChangedEventArgs.cs
- InvalidDataContractException.cs
- PipelineModuleStepContainer.cs
- WorkflowMarkupElementEventArgs.cs
- BaseCodePageEncoding.cs
- WindowsAuthenticationModule.cs
- QueryContinueDragEvent.cs
- ProxyManager.cs
- Vector3DAnimationUsingKeyFrames.cs
- EventManager.cs
- DataContractSerializer.cs
- NotConverter.cs
- IdnElement.cs
- PolyBezierSegmentFigureLogic.cs
- SizeFConverter.cs
- MethodToken.cs
- Site.cs
- _NegoState.cs
- XmlChildNodes.cs
- ExpressionCopier.cs
- ReaderWriterLockWrapper.cs
- VerificationException.cs
- InfoCardRSAOAEPKeyExchangeFormatter.cs
- CultureInfo.cs
- BitmapCodecInfoInternal.cs
- SiteMapDataSource.cs
- DoubleLink.cs
- DataDocumentXPathNavigator.cs
- PropertyMap.cs
- ViewBox.cs
- codemethodreferenceexpression.cs
- SqlPersonalizationProvider.cs
- XmlSchemaGroupRef.cs
- AttachInfo.cs
- SoapSchemaMember.cs
- DataTableClearEvent.cs
- LayoutTable.cs
- StorageAssociationTypeMapping.cs
- wmiprovider.cs
- AvTrace.cs
- FontConverter.cs
- TextTrailingWordEllipsis.cs
- OperationResponse.cs
- DesignSurfaceEvent.cs
- SqlBuilder.cs
- PrintDialogDesigner.cs
- Point3DCollection.cs
- FlowLayoutPanel.cs
- Internal.cs
- IntellisenseTextBox.cs
- ResourcePool.cs
- Relationship.cs
- OdbcDataReader.cs
- RegexCompilationInfo.cs
- BufferedGraphicsContext.cs
- __ConsoleStream.cs
- WebChannelFactory.cs
- SpeakInfo.cs
- RedistVersionInfo.cs
- HttpListenerPrefixCollection.cs
- GridViewRowPresenter.cs
- _ReceiveMessageOverlappedAsyncResult.cs
- HttpVersion.cs
- ObjectListDataBindEventArgs.cs
- TagPrefixInfo.cs
- StylusPointPropertyInfo.cs
- ToolbarAUtomationPeer.cs
- SynchronizationLockException.cs
- EventMappingSettings.cs
- StaticSiteMapProvider.cs
- EnvelopeVersion.cs
- CurrentChangedEventManager.cs
- TableLayoutRowStyleCollection.cs
- IPAddress.cs
- WindowsStreamSecurityElement.cs
- ObjectStorage.cs
- EntityType.cs
- QueryExpr.cs
- StatusStrip.cs
- NumberFormatInfo.cs
- DiffuseMaterial.cs
- TreeViewEvent.cs
- ClientScriptManager.cs
- ControlCachePolicy.cs
- Literal.cs
- AssemblyUtil.cs
- XmlNamespaceDeclarationsAttribute.cs
- HttpRequestMessageProperty.cs
- ReturnValue.cs
- BamlLocalizableResource.cs
- sqlpipe.cs
- TextTreeTextNode.cs
- IntegrationExceptionEventArgs.cs
- XmlCharType.cs
- InstancePersistence.cs
- GeneralTransform.cs
- CollectionsUtil.cs
- FillErrorEventArgs.cs
- DataGridViewAccessibleObject.cs