Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Compilation / ExpressionBuilder.cs / 1 / ExpressionBuilder.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Compilation { using System; using System.Security.Permissions; using System.CodeDom; using System.Collections; using System.Collections.Specialized; using System.ComponentModel.Design; using System.Web.Configuration; using System.Reflection; using System.Web; using System.Web.Hosting; #if !FEATURE_PAL using System.Web.UI.Design; #endif // !FEATURE_PAL using System.Web.UI; using System.Web.Util; [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public abstract class ExpressionBuilder { private static ExpressionBuilder dataBindingExpressionBuilder; internal virtual void BuildExpression(BoundPropertyEntry bpe, ControlBuilder controlBuilder, CodeExpression controlReference, CodeStatementCollection methodStatements, CodeStatementCollection statements, CodeLinePragma linePragma, ref bool hasTempObject) { CodeExpression codeExpression = GetCodeExpression(bpe, bpe.ParsedExpressionData, new ExpressionBuilderContext(controlBuilder.VirtualPath)); CodeDomUtility.CreatePropertySetStatements(methodStatements, statements, controlReference, bpe.Name, bpe.Type, codeExpression, linePragma); } internal static ExpressionBuilder GetExpressionBuilder(string expressionPrefix, VirtualPath virtualPath) { return GetExpressionBuilder(expressionPrefix, virtualPath, null); } internal static ExpressionBuilder GetExpressionBuilder(string expressionPrefix, VirtualPath virtualPath, IDesignerHost host) { // If there is no expressionPrefix, it's a v1 style databinding expression if (expressionPrefix.Length == 0) { if (dataBindingExpressionBuilder == null) { dataBindingExpressionBuilder = new DataBindingExpressionBuilder(); } return dataBindingExpressionBuilder; } CompilationSection config = null; // If we are in the designer, we need to access IWebApplication config instead #if !FEATURE_PAL // FEATURE_PAL does not support designer-based features if (host != null) { IWebApplication webapp = (IWebApplication)host.GetService(typeof(IWebApplication)); if (webapp != null) { config = webapp.OpenWebConfiguration(true).GetSection("system.web/compilation") as CompilationSection; } } #endif // !FEATURE_PAL // If we failed to get config from the designer, fall back on runtime config always if (config == null) { config = RuntimeConfig.GetConfig(virtualPath).Compilation; } System.Web.Configuration.ExpressionBuilder builder = config.ExpressionBuilders[expressionPrefix]; if (builder == null) { throw new HttpParseException(SR.GetString(SR.InvalidExpressionPrefix, expressionPrefix)); } Type expressionBuilderType = null; if (host != null) { // If we are in the designer, we have to use the type resolution service ITypeResolutionService ts = (ITypeResolutionService)host.GetService(typeof(ITypeResolutionService)); if (ts != null) { expressionBuilderType = ts.GetType(builder.Type); } } if (expressionBuilderType == null) { expressionBuilderType = builder.TypeInternal; } Debug.Assert(expressionBuilderType != null, "expressionBuilderType should not be null"); if (!typeof(ExpressionBuilder).IsAssignableFrom(expressionBuilderType)) { throw new HttpParseException(SR.GetString(SR.ExpressionBuilder_InvalidType, expressionBuilderType.FullName)); } ExpressionBuilder expressionBuilder = (ExpressionBuilder)HttpRuntime.FastCreatePublicInstance(expressionBuilderType); return expressionBuilder; } // // Public API // public virtual bool SupportsEvaluate { get { return false; } } public virtual object ParseExpression(string expression, Type propertyType, ExpressionBuilderContext context) { return null; } public abstract CodeExpression GetCodeExpression(BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context); public virtual object EvaluateExpression(object target, BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context) { return null; } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ReverseInheritProperty.cs
- OperatingSystem.cs
- UIElement.cs
- FrameworkElementAutomationPeer.cs
- CommandDesigner.cs
- TextFormatterImp.cs
- SqlStream.cs
- InheritanceAttribute.cs
- EventLogPermissionEntryCollection.cs
- ManipulationBoundaryFeedbackEventArgs.cs
- ItemAutomationPeer.cs
- CryptoStream.cs
- MetadataStore.cs
- NetworkCredential.cs
- OutputCacheSection.cs
- HttpPostedFileWrapper.cs
- DescendantOverDescendantQuery.cs
- IndentedWriter.cs
- SystemIcmpV4Statistics.cs
- ToolboxComponentsCreatedEventArgs.cs
- FontFamilyConverter.cs
- SqlFlattener.cs
- OleDbRowUpdatingEvent.cs
- Int32CollectionConverter.cs
- DataGridViewAutoSizeModeEventArgs.cs
- WorkflowInstance.cs
- DocumentPageView.cs
- NonVisualControlAttribute.cs
- InvokeHandlers.cs
- Triplet.cs
- ListViewItemMouseHoverEvent.cs
- ScrollBar.cs
- EmptyStringExpandableObjectConverter.cs
- ScriptRegistrationManager.cs
- StringUtil.cs
- TypeGeneratedEventArgs.cs
- MultiSelector.cs
- PrimitiveSchema.cs
- TransportContext.cs
- VirtualizingStackPanel.cs
- WebPartConnectionsConnectVerb.cs
- DispatchProxy.cs
- HitTestWithGeometryDrawingContextWalker.cs
- XmlObjectSerializerReadContext.cs
- GridViewPageEventArgs.cs
- TypeSystemHelpers.cs
- AssociationProvider.cs
- DerivedKeyCachingSecurityTokenSerializer.cs
- SpeakCompletedEventArgs.cs
- MultipleViewProviderWrapper.cs
- COM2PropertyDescriptor.cs
- Calendar.cs
- ClassDataContract.cs
- EncoderParameter.cs
- ProfileInfo.cs
- IndicCharClassifier.cs
- MemoryMappedViewAccessor.cs
- StorageEndPropertyMapping.cs
- CultureTableRecord.cs
- SingleQueryOperator.cs
- ListBindingHelper.cs
- Profiler.cs
- ColorBlend.cs
- ScrollProperties.cs
- NavigationFailedEventArgs.cs
- DrawingServices.cs
- ToolboxItemCollection.cs
- CompoundFileDeflateTransform.cs
- NumberSubstitution.cs
- ChameleonKey.cs
- DataGridViewLinkCell.cs
- WebAdminConfigurationHelper.cs
- DockAndAnchorLayout.cs
- TreeViewImageIndexConverter.cs
- BuilderElements.cs
- UserValidatedEventArgs.cs
- DesignSurfaceEvent.cs
- RenderDataDrawingContext.cs
- SqlLiftWhereClauses.cs
- FontUnit.cs
- RemoteArgument.cs
- PieceNameHelper.cs
- AsymmetricKeyExchangeFormatter.cs
- ToolZoneDesigner.cs
- XmlSerializerVersionAttribute.cs
- ToolStripItemCollection.cs
- FileDialog.cs
- DataGridViewRowPrePaintEventArgs.cs
- PolicyStatement.cs
- DrawingVisualDrawingContext.cs
- TableCellCollection.cs
- DefaultAsyncDataDispatcher.cs
- ThreadInterruptedException.cs
- ObjectQueryProvider.cs
- UmAlQuraCalendar.cs
- TextControlDesigner.cs
- ProtocolsConfigurationHandler.cs
- StreamHelper.cs
- SessionSymmetricTransportSecurityProtocolFactory.cs
- HttpRuntime.cs