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
- ChtmlFormAdapter.cs
- GetPageCompletedEventArgs.cs
- CapabilitiesState.cs
- HostedHttpContext.cs
- StatusBarDrawItemEvent.cs
- IndexingContentUnit.cs
- CriticalExceptions.cs
- AccessControlList.cs
- MetadataConversionError.cs
- AuthorizationPolicyTypeElement.cs
- HeaderFilter.cs
- TextEditorSelection.cs
- CompareValidator.cs
- SessionStateContainer.cs
- SmiSettersStream.cs
- FileEnumerator.cs
- DataTable.cs
- XsltException.cs
- HttpClientCertificate.cs
- ContentAlignmentEditor.cs
- AutomationElementIdentifiers.cs
- SelectionChangedEventArgs.cs
- CustomError.cs
- SpanIndex.cs
- ResourceDictionary.cs
- StyleCollectionEditor.cs
- SqlNodeTypeOperators.cs
- _IPv6Address.cs
- CharacterBufferReference.cs
- QueuePathDialog.cs
- LineBreakRecord.cs
- XmlSchemaValidationException.cs
- SerialErrors.cs
- OutputCacheSettingsSection.cs
- CryptoApi.cs
- ADMembershipUser.cs
- RoleManagerEventArgs.cs
- XsdCachingReader.cs
- SecurityManager.cs
- MarshalByValueComponent.cs
- NativeMethods.cs
- StylusDevice.cs
- Function.cs
- AspProxy.cs
- XmlSerializerVersionAttribute.cs
- SafeLibraryHandle.cs
- QueryableDataSourceHelper.cs
- StrokeSerializer.cs
- XmlIlVisitor.cs
- SafeNativeMethodsOther.cs
- FormCollection.cs
- MD5CryptoServiceProvider.cs
- XmlCharCheckingWriter.cs
- Utility.cs
- ECDiffieHellmanCngPublicKey.cs
- PocoPropertyAccessorStrategy.cs
- OrderByBuilder.cs
- StateMachineExecutionState.cs
- DBCommand.cs
- PeerChannelFactory.cs
- MenuAdapter.cs
- ClientScriptManager.cs
- StateBag.cs
- ListBindingConverter.cs
- OpenTypeLayout.cs
- DataRowChangeEvent.cs
- ToolBar.cs
- StringUtil.cs
- WsdlContractConversionContext.cs
- TextTreeUndoUnit.cs
- FixedPage.cs
- AuthorizationRuleCollection.cs
- XmlComplianceUtil.cs
- DataSourceControl.cs
- log.cs
- StorageFunctionMapping.cs
- OleDbConnectionPoolGroupProviderInfo.cs
- ExitEventArgs.cs
- SoapProtocolImporter.cs
- EventWaitHandleSecurity.cs
- GenerateTemporaryTargetAssembly.cs
- FormsAuthenticationModule.cs
- MultipartIdentifier.cs
- ObjectQuery.cs
- NativeMethods.cs
- XmlValidatingReader.cs
- Rights.cs
- LiteralText.cs
- DecoderExceptionFallback.cs
- HatchBrush.cs
- SafeHandle.cs
- validation.cs
- VectorAnimation.cs
- DecoderFallbackWithFailureFlag.cs
- FrameworkTextComposition.cs
- QilXmlWriter.cs
- FormParameter.cs
- ObjectViewEntityCollectionData.cs
- SortableBindingList.cs
- UntypedNullExpression.cs