Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWebControls / System / Data / WebControls / EntityDataSourceMemberPath.cs / 1305376 / EntityDataSourceMemberPath.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.Data.Common; using System.Data.Objects; namespace System.Web.UI.WebControls { ////// A glorified linked list. Describes a chain of properties from a primitive /// type to a root entity. /// class EntityDataSourceMemberPath { private readonly EdmProperty property; private readonly PropertyInfo propertyInfo; private readonly EntityDataSourceMemberPath parent; private readonly bool isLocallyInteresting; private readonly Type clrType; private readonly bool isKey; internal EntityDataSourceMemberPath(MetadataWorkspace ocWorkspace, EntityDataSourceMemberPath parent, EdmProperty property, bool isLocallyInteresting) { EntityDataSourceUtil.CheckArgumentNull(ocWorkspace, "ocWorkspace"); EntityDataSourceUtil.CheckArgumentNull(property, "property"); this.property = property; this.parent = parent; this.isLocallyInteresting = isLocallyInteresting; this.clrType = EntityDataSourceUtil.GetMemberClrType(ocWorkspace, property); this.isKey = IsPropertyAKey(property); // retrieve PropertyInfo (with respect to parent CLR type) StructuralType parentType = property.DeclaringType; Type parentClrType = EntityDataSourceUtil.GetClrType(ocWorkspace, parentType); this.propertyInfo = EntityDataSourceUtil.GetPropertyInfo(parentClrType, this.property.Name); } ////// Describes the member path in the form 'property1.property2...'. Use to /// determine display name for nested properties in the EDSC. /// ///Description of the internal string GetDescription() { string prefix = null == this.parent ? string.Empty : this.parent.GetDescription() + "."; return prefix + this.property.Name; } ////// Indicates whether original values of this member should be preserved. /// internal bool IsInteresting { get { // a member path is interesting if anything along the path is interesting return this.isLocallyInteresting || (null != this.parent && this.parent.IsInteresting); } } ////// Indicates whether this member represents a primary key value. /// internal bool IsKey { get { return this.isKey; } } ////// Indicates whether this member can be assigned a value of null. /// internal bool IsNullable { get { return this.property.Nullable; } } internal bool IsPrimitive { get { return this.property.TypeUsage.EdmType.BuiltInTypeKind == BuiltInTypeKind.PrimitiveType; } } ////// Gets the CLR type of the last member in the path. /// internal Type ClrType { get { return this.clrType; } } internal object GetValue(EntityDataSourceWrapper entity) { object parentObjectValue = GetParentObjectValue(entity, false /* initialize */); if (null == parentObjectValue) { // use convention that property of null is null return null; } else { // get this property object propertyValue = this.propertyInfo.GetValue(parentObjectValue, new object[] { }); return propertyValue; } } internal void SetValue(EntityDataSourceWrapper entity, object value) { object parentObjectValue = GetParentObjectValue(entity, true /* initialize */); // set property value on parent this.propertyInfo.SetValue(parentObjectValue, value, new object[] { }); } private object Initialize(EntityDataSourceWrapper entity) { // get parent's value object parentObjectValue = GetParentObjectValue(entity, true /* initialize */); // construct type instance for this property object propertyValue = EntityDataSourceUtil.InitializeType(this.ClrType); // set property this.propertyInfo.SetValue(parentObjectValue, propertyValue, new object[] { }); return propertyValue; } private object GetParentObjectValue(EntityDataSourceWrapper entity, bool initialize) { // get parent's value object parentObjectValue; if (null == this.parent) { // at the top level, the entity is the value parentObjectValue = entity.WrappedEntity; } else { parentObjectValue = this.parent.GetValue(entity); if (null == parentObjectValue && initialize) { parentObjectValue = this.parent.Initialize(entity); } } return parentObjectValue; } internal string GetEntitySqlValue() { // it.[member1].[member2]... string prefix; if (null != parent) { prefix = parent.GetEntitySqlValue(); } else { prefix = EntityDataSourceUtil.EntitySqlElementAlias; } string eSql = prefix + "." + EntityDataSourceUtil.QuoteEntitySqlIdentifier(this.property.Name); return eSql; } private bool IsPropertyAKey(EdmProperty property) { bool isKey = false; EntityType entityType = property.DeclaringType as EntityType; if (null != entityType) { isKey = entityType.KeyMembers.Contains(property); } return isKey; } public override string ToString() { string prefix = null == this.parent ? string.Empty : this.parent.ToString() + "->"; return prefix + this.property.Name; } } } // 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
- StrokeDescriptor.cs
- InitiatorSessionSymmetricTransportSecurityProtocol.cs
- TypeProvider.cs
- EnumUnknown.cs
- OutputScopeManager.cs
- WebPartDeleteVerb.cs
- TableCellCollection.cs
- UserPersonalizationStateInfo.cs
- SettingsAttributes.cs
- WebPartVerbsEventArgs.cs
- InkCanvasInnerCanvas.cs
- Policy.cs
- StreamReader.cs
- Padding.cs
- ExpressionQuoter.cs
- TextBoxAutoCompleteSourceConverter.cs
- GridViewPageEventArgs.cs
- ToolStripDropDown.cs
- PagerStyle.cs
- DesignerView.Commands.cs
- KeyValueInternalCollection.cs
- basemetadatamappingvisitor.cs
- PowerModeChangedEventArgs.cs
- DataGridViewLinkColumn.cs
- CompilerInfo.cs
- PrtTicket_Public.cs
- PageCatalogPart.cs
- Compiler.cs
- SubqueryRules.cs
- validationstate.cs
- CrossContextChannel.cs
- RewritingValidator.cs
- XamlWrappingReader.cs
- CodePageUtils.cs
- SiteMapNodeCollection.cs
- SqlNodeAnnotations.cs
- DesignerCalendarAdapter.cs
- DynamicUpdateCommand.cs
- AsyncContentLoadedEventArgs.cs
- ComboBox.cs
- RectangleConverter.cs
- TypeConverterHelper.cs
- behaviorssection.cs
- PopupRoot.cs
- _UriTypeConverter.cs
- DrawingCollection.cs
- TreeViewEvent.cs
- PrintDialog.cs
- SolidColorBrush.cs
- LogStream.cs
- HttpCookie.cs
- MonitorWrapper.cs
- XamlVector3DCollectionSerializer.cs
- HitTestWithPointDrawingContextWalker.cs
- NamespaceExpr.cs
- GridLengthConverter.cs
- DBBindings.cs
- DataGridViewRowPostPaintEventArgs.cs
- View.cs
- NonSerializedAttribute.cs
- FieldNameLookup.cs
- CompareInfo.cs
- XhtmlConformanceSection.cs
- ProcessModelSection.cs
- BaseTemplateParser.cs
- OperatorExpressions.cs
- SerializationTrace.cs
- QuestionEventArgs.cs
- BrowserCapabilitiesCodeGenerator.cs
- TextBoxRenderer.cs
- NamespaceInfo.cs
- LoginUtil.cs
- Variant.cs
- LogicalTreeHelper.cs
- util.cs
- MatcherBuilder.cs
- InternalConfigConfigurationFactory.cs
- ISCIIEncoding.cs
- BlobPersonalizationState.cs
- CodeTypeReference.cs
- CodeTypeMember.cs
- FaultContractAttribute.cs
- MetaType.cs
- FrugalList.cs
- Array.cs
- CommandHelper.cs
- EventMemberCodeDomSerializer.cs
- SessionEndingCancelEventArgs.cs
- StreamUpdate.cs
- XmlElementAttribute.cs
- StrongNameUtility.cs
- NavigateEvent.cs
- BufferBuilder.cs
- Event.cs
- Section.cs
- odbcmetadatacolumnnames.cs
- UserControlParser.cs
- WSAddressing10ProblemHeaderQNameFault.cs
- AutomationPatternInfo.cs
- RightsManagementProvider.cs