Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DLinq / Dlinq / DataBindingList.cs / 1599186 / DataBindingList.cs
using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Linq; using System.Data.Linq.Mapping; using System.Reflection; using System.Runtime.CompilerServices; namespace System.Data.Linq.Provider { internal static class BindingList { [MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)] internal static IBindingList Create(DataContext context, IEnumerable sequence) { List list = sequence.ToList(); MetaTable metaTable = context.Services.Model.GetTable(typeof(T)); if (metaTable != null) { ITable table = context.GetTable(metaTable.RowType.Type); Type bindingType = typeof(DataBindingList<>).MakeGenericType(metaTable.RowType.Type); return (IBindingList)Activator.CreateInstance(bindingType, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, new object[] { list, table }, null ); } else { return new SortableBindingList (list); } } } internal class DataBindingList : SortableBindingList where TEntity : class { private Table data; private TEntity addNewInstance; private TEntity cancelNewInstance; private bool addingNewInstance; internal DataBindingList(IList sequence, Table data) : base(sequence != null ? sequence : new List ()) { if (sequence == null) { throw Error.ArgumentNull("sequence"); } if (data == null) { throw Error.ArgumentNull("data"); } this.data = data; } protected override object AddNewCore() { 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.InsertOnSubmit(item); } } protected override void RemoveItem(int index) { if (index >= 0 && index < Count && this[index] == cancelNewInstance) { cancelNewInstance = null; } else { this.data.DeleteOnSubmit(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.DeleteOnSubmit(removedItem); } this.data.InsertOnSubmit(item); } } protected override void ClearItems() { this.data.DeleteAllOnSubmit(this.data.ToList()); base.ClearItems(); } public override void EndNew(int itemIndex) { if (itemIndex >= 0 && itemIndex < Count && this[itemIndex] == addNewInstance) { this.data.InsertOnSubmit(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
- ValidationHelper.cs
- ModelVisual3D.cs
- EnumDataContract.cs
- Vector3DValueSerializer.cs
- MultilineStringEditor.cs
- PriorityQueue.cs
- Tokenizer.cs
- propertyentry.cs
- FontTypeConverter.cs
- Drawing.cs
- HandlerMappingMemo.cs
- KnownTypes.cs
- EntityConnectionStringBuilder.cs
- MouseOverProperty.cs
- MailAddressParser.cs
- ParserContext.cs
- Model3DGroup.cs
- SQLSingle.cs
- Module.cs
- TraceSource.cs
- XmlSchemaDocumentation.cs
- Utils.cs
- IDQuery.cs
- DateTimeParse.cs
- CachedRequestParams.cs
- OletxResourceManager.cs
- ADConnectionHelper.cs
- DynamicMethod.cs
- ReverseQueryOperator.cs
- XhtmlStyleClass.cs
- ICspAsymmetricAlgorithm.cs
- DependencyPropertyHelper.cs
- SmiTypedGetterSetter.cs
- PartitionResolver.cs
- BitmapPalettes.cs
- NativeCppClassAttribute.cs
- DataGridViewLayoutData.cs
- RegexFCD.cs
- XamlStackWriter.cs
- MarshalByValueComponent.cs
- PointAnimationBase.cs
- NullableIntMinMaxAggregationOperator.cs
- FileRecordSequenceHelper.cs
- ReadOnlyHierarchicalDataSource.cs
- SettingsPropertyNotFoundException.cs
- CodeAccessPermission.cs
- DataRelationPropertyDescriptor.cs
- OptionalMessageQuery.cs
- XmlParserContext.cs
- _LazyAsyncResult.cs
- NamespaceMapping.cs
- SamlNameIdentifierClaimResource.cs
- SynchronizationFilter.cs
- PrinterUnitConvert.cs
- TextTreeFixupNode.cs
- ResXResourceReader.cs
- NeutralResourcesLanguageAttribute.cs
- PropertyOverridesDialog.cs
- QueryCacheManager.cs
- RealizationDrawingContextWalker.cs
- BitmapEffectInputData.cs
- CellIdBoolean.cs
- ProtectedConfigurationProviderCollection.cs
- TransactionScope.cs
- SettingsProperty.cs
- dbdatarecord.cs
- DataSetViewSchema.cs
- DelegateBodyWriter.cs
- IndexOutOfRangeException.cs
- ValueUtilsSmi.cs
- Size.cs
- SocketPermission.cs
- AdornerLayer.cs
- SslStream.cs
- MaskedTextBoxTextEditor.cs
- FontSource.cs
- PeerResolverMode.cs
- SqlDataReaderSmi.cs
- HttpResponse.cs
- SecurityState.cs
- ConfigXmlWhitespace.cs
- StrokeNodeOperations.cs
- SrgsRuleRef.cs
- FixedSOMContainer.cs
- HexParser.cs
- X509ChainElement.cs
- KeyValueConfigurationElement.cs
- PageCanvasSize.cs
- TPLETWProvider.cs
- Transform3DGroup.cs
- ParentControlDesigner.cs
- ApplicationServiceManager.cs
- KeyedCollection.cs
- CaseInsensitiveHashCodeProvider.cs
- ToolTipAutomationPeer.cs
- Ref.cs
- TabControl.cs
- PeerConnector.cs
- HtmlTextArea.cs
- EventMap.cs