Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DLinq / Dlinq / EntitySetDataBindingList.cs / 1 / EntitySetDataBindingList.cs
using System.Collections.Generic; using System.ComponentModel; using System.Linq; using System.Reflection; using System.Diagnostics.CodeAnalysis; namespace System.Data.Linq { internal class EntitySetBindingList: SortableBindingList where TEntity : class { private EntitySet data; private TEntity addNewInstance; private TEntity cancelNewInstance; private bool addingNewInstance; internal EntitySetBindingList(IList sequence, EntitySet data) : base(sequence) { if (sequence == null) { throw Error.ArgumentNull("sequence"); } if (data == null) { throw Error.ArgumentNull("data"); } this.data = data; } [SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic", Justification="Unknown reason.")] private void ThrowEntitySetErrorsIfTypeInappropriate() { Type type = typeof(TEntity); if (type.IsAbstract) { throw Error.EntitySetDataBindingWithAbstractBaseClass(type.Name); } if (type.GetConstructor(System.Type.EmptyTypes) == null) { throw Error.EntitySetDataBindingWithNonPublicDefaultConstructor(type.Name); } } protected override object AddNewCore() { ThrowEntitySetErrorsIfTypeInappropriate(); addingNewInstance = true; addNewInstance = (TEntity)base.AddNewCore(); return addNewInstance; } protected override void InsertItem(int index, TEntity item) { base.InsertItem(index, item); if (!addingNewInstance && index >= 0 && index <= Count) { this.data.Insert(index, item); } } protected override void RemoveItem(int index) { if (index >= 0 && index < Count && this[index] == cancelNewInstance) { cancelNewInstance = null; } else { this.data.Remove(this[index]); } base.RemoveItem(index); } protected override void SetItem(int index, TEntity item) { TEntity removedItem = this[index]; base.SetItem(index, item); if (index >= 0 && index < Count) { //Check to see if the user is trying to set an item that is currently being added via AddNew //If so then the list should not continue the AddNew; but instead add the item //that is being passed in. if (removedItem == addNewInstance) { addNewInstance = null; addingNewInstance = false; } else { this.data.Remove(removedItem); } this.data.Insert(index,item); } } protected override void ClearItems() { this.data.Clear(); base.ClearItems(); } public override void EndNew(int itemIndex) { if (itemIndex >= 0 && itemIndex < Count && this[itemIndex] == addNewInstance) { this.data.Add(addNewInstance); addNewInstance = null; addingNewInstance = false; } base.EndNew(itemIndex); } public override void CancelNew(int itemIndex) { if (itemIndex >= 0 && itemIndex < Count && this[itemIndex] == addNewInstance) { cancelNewInstance = addNewInstance; addNewInstance = null; addingNewInstance = false; } base.CancelNew(itemIndex); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. using System.Collections.Generic; using System.ComponentModel; using System.Linq; using System.Reflection; using System.Diagnostics.CodeAnalysis; namespace System.Data.Linq { internal class EntitySetBindingList : SortableBindingList where TEntity : class { private EntitySet data; private TEntity addNewInstance; private TEntity cancelNewInstance; private bool addingNewInstance; internal EntitySetBindingList(IList sequence, EntitySet data) : base(sequence) { if (sequence == null) { throw Error.ArgumentNull("sequence"); } if (data == null) { throw Error.ArgumentNull("data"); } this.data = data; } [SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic", Justification="Unknown reason.")] private void ThrowEntitySetErrorsIfTypeInappropriate() { Type type = typeof(TEntity); if (type.IsAbstract) { throw Error.EntitySetDataBindingWithAbstractBaseClass(type.Name); } if (type.GetConstructor(System.Type.EmptyTypes) == null) { throw Error.EntitySetDataBindingWithNonPublicDefaultConstructor(type.Name); } } protected override object AddNewCore() { ThrowEntitySetErrorsIfTypeInappropriate(); addingNewInstance = true; addNewInstance = (TEntity)base.AddNewCore(); return addNewInstance; } protected override void InsertItem(int index, TEntity item) { base.InsertItem(index, item); if (!addingNewInstance && index >= 0 && index <= Count) { this.data.Insert(index, item); } } protected override void RemoveItem(int index) { if (index >= 0 && index < Count && this[index] == cancelNewInstance) { cancelNewInstance = null; } else { this.data.Remove(this[index]); } base.RemoveItem(index); } protected override void SetItem(int index, TEntity item) { TEntity removedItem = this[index]; base.SetItem(index, item); if (index >= 0 && index < Count) { //Check to see if the user is trying to set an item that is currently being added via AddNew //If so then the list should not continue the AddNew; but instead add the item //that is being passed in. if (removedItem == addNewInstance) { addNewInstance = null; addingNewInstance = false; } else { this.data.Remove(removedItem); } this.data.Insert(index,item); } } protected override void ClearItems() { this.data.Clear(); base.ClearItems(); } public override void EndNew(int itemIndex) { if (itemIndex >= 0 && itemIndex < Count && this[itemIndex] == addNewInstance) { this.data.Add(addNewInstance); addNewInstance = null; addingNewInstance = false; } base.EndNew(itemIndex); } public override void CancelNew(int itemIndex) { if (itemIndex >= 0 && itemIndex < Count && this[itemIndex] == addNewInstance) { cancelNewInstance = addNewInstance; addNewInstance = null; addingNewInstance = false; } base.CancelNew(itemIndex); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DisposableCollectionWrapper.cs
- SearchForVirtualItemEventArgs.cs
- CodeSubDirectory.cs
- MailAddressCollection.cs
- TdsParserSafeHandles.cs
- ReadOnlyPropertyMetadata.cs
- LocalizationComments.cs
- DesignerVerb.cs
- DataServiceHost.cs
- DrawingContextFlattener.cs
- FileUtil.cs
- AutoGeneratedField.cs
- ReferenceList.cs
- SQLDoubleStorage.cs
- TcpServerChannel.cs
- GridViewRow.cs
- WsdlBuildProvider.cs
- COM2TypeInfoProcessor.cs
- RepeaterItemEventArgs.cs
- GeneralTransform2DTo3D.cs
- PackageRelationship.cs
- BlockCollection.cs
- OracleDataReader.cs
- SoapHttpTransportImporter.cs
- HeaderUtility.cs
- AppDomainResourcePerfCounters.cs
- GeometryCombineModeValidation.cs
- List.cs
- GridLengthConverter.cs
- Base64Stream.cs
- HashHelper.cs
- MapPathBasedVirtualPathProvider.cs
- EntityClientCacheEntry.cs
- SvcMapFileLoader.cs
- OutputCacheSection.cs
- FlatButtonAppearance.cs
- HostUtils.cs
- StreamWriter.cs
- KerberosReceiverSecurityToken.cs
- sqlstateclientmanager.cs
- HostProtectionException.cs
- PointConverter.cs
- UpDownEvent.cs
- DataGridViewIntLinkedList.cs
- Pkcs9Attribute.cs
- SkinBuilder.cs
- SQLInt64.cs
- SchemaEntity.cs
- TraceHandler.cs
- XmlCharType.cs
- AttachedPropertyInfo.cs
- CookielessHelper.cs
- FormViewModeEventArgs.cs
- MonitoringDescriptionAttribute.cs
- WindowsListViewSubItem.cs
- ToolStripManager.cs
- DictionaryContent.cs
- URL.cs
- HttpCookiesSection.cs
- ReflectPropertyDescriptor.cs
- PolicyValidationException.cs
- NavigateEvent.cs
- ZipIOCentralDirectoryFileHeader.cs
- SHA512.cs
- WebPartExportVerb.cs
- TypeDefinition.cs
- StrokeRenderer.cs
- Scripts.cs
- CreateParams.cs
- CompositeFontParser.cs
- PartitionedStream.cs
- SQLUtility.cs
- CngAlgorithm.cs
- LocalValueEnumerator.cs
- MissingMemberException.cs
- DoubleLinkListEnumerator.cs
- GeneralTransform2DTo3D.cs
- CompositeCollectionView.cs
- SelectionUIService.cs
- XpsS0ValidatingLoader.cs
- ImageClickEventArgs.cs
- MarginCollapsingState.cs
- SpinLock.cs
- Metafile.cs
- DiscreteKeyFrames.cs
- DependencyStoreSurrogate.cs
- MessagingDescriptionAttribute.cs
- StyleBamlRecordReader.cs
- SendActivityEventArgs.cs
- OutputScopeManager.cs
- PropertyCollection.cs
- SiteMapNode.cs
- VisualCollection.cs
- MailDefinitionBodyFileNameEditor.cs
- DefaultEventAttribute.cs
- StorageAssociationTypeMapping.cs
- DecoderBestFitFallback.cs
- DataSourceView.cs
- HtmlShimManager.cs
- XPathSelfQuery.cs