Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWebControls / System / Data / WebControls / EntityDataSourceReferenceGroup.cs / 1599186 / EntityDataSourceReferenceGroup.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data.EntityClient; using System.Data.Metadata.Edm; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.ComponentModel; using System.Data.Common; using System.Data.Objects.DataClasses; using System.Data.Objects; using System.Data; using System.Runtime.CompilerServices; namespace System.Web.UI.WebControls { ////// Groups together reference columns pointing at the same association end. /// internal abstract class EntityDataSourceReferenceGroup { private readonly AssociationSetEnd end; protected EntityDataSourceReferenceGroup(AssociationSetEnd end) { EntityDataSourceUtil.CheckArgumentNull(end, "end"); this.end = end; } internal AssociationSetEnd End { get { return this.end; } } [MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)] internal static EntityDataSourceReferenceGroup Create(Type entityType, AssociationSetEnd end) { EntityDataSourceUtil.CheckArgumentNull(entityType, "entityType"); Type groupType = typeof(EntityDataSourceReferenceGroup<>).MakeGenericType(entityType); return (EntityDataSourceReferenceGroup)Activator.CreateInstance(groupType, new object[] { end }); } internal abstract void SetKeyValues(EntityDataSourceWrapper wrapper, DictionarynewKeyValues); internal abstract EntityKey GetEntityKey(EntityDataSourceWrapper entity); } internal class EntityDataSourceReferenceGroup : EntityDataSourceReferenceGroup where T : class { public EntityDataSourceReferenceGroup(AssociationSetEnd end) : base(end) { } internal override void SetKeyValues(EntityDataSourceWrapper wrapper, Dictionary newKeyValues) { EntityDataSourceUtil.CheckArgumentNull(wrapper, "wrapper"); EntityReference reference = GetRelatedReference(wrapper); EntityKey originalEntityKeys = reference.EntityKey; if (null != newKeyValues) { if(null != originalEntityKeys) { // mix the missing keys from the original values foreach (var originalEntityKey in originalEntityKeys.EntityKeyValues) { object newKeyValue; if (newKeyValues.TryGetValue(originalEntityKey.Key, out newKeyValue)) { // if any part of the key is null, the EntityKey is null if (null == newKeyValue) { newKeyValues = null; break; } } else { // add the original value for this partial key since it is not saved in the viewstate newKeyValues.Add(originalEntityKey.Key, originalEntityKey.Value); } } } else { // what we have in the newKeyValues should be sufficient to set the key // but if any value is null, the whole key is null foreach (var newKey in newKeyValues) { if (null == newKey.Value) { newKeyValues = null; break; } } } } if (null == newKeyValues) { // if the entity key is a compound key, and if any partial key is null, then the entitykey is null reference.EntityKey = null; } else { reference.EntityKey = new EntityKey(EntityDataSourceUtil.GetQualifiedEntitySetName(End.EntitySet), (IEnumerable >)newKeyValues); } } internal override EntityKey GetEntityKey(EntityDataSourceWrapper entity) { EntityKey key = GetRelatedReference(entity).EntityKey; return key; } private EntityReference GetRelatedReference(EntityDataSourceWrapper entity) { RelationshipManager relationshipManager = entity.RelationshipManager; Debug.Assert(relationshipManager != null, "couldn't get a relationship manager"); EntityReference reference = relationshipManager.GetRelatedReference ( this.End.ParentAssociationSet.ElementType.FullName, this.End.CorrespondingAssociationEndMember.Name); return reference; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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