Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Compilation / AppSettingsExpressionBuilder.cs / 1305376 / AppSettingsExpressionBuilder.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Compilation { using System; using System.Security.Permissions; using System.CodeDom; using System.ComponentModel; using System.Configuration; using System.Diagnostics; using System.Web.UI; [ExpressionPrefix("AppSettings")] [ExpressionEditor("System.Web.UI.Design.AppSettingsExpressionEditor, " + AssemblyRef.SystemDesign)] public class AppSettingsExpressionBuilder : ExpressionBuilder { public override bool SupportsEvaluate { get { return true; } } public override CodeExpression GetCodeExpression(BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context) { if (entry.DeclaringType == null || entry.PropertyInfo == null) { return new CodeMethodInvokeExpression( new CodeTypeReferenceExpression(this.GetType()), "GetAppSetting", new CodePrimitiveExpression(entry.Expression.Trim())); } else { return new CodeMethodInvokeExpression( new CodeTypeReferenceExpression(this.GetType()), "GetAppSetting", new CodePrimitiveExpression(entry.Expression.Trim()), new CodeTypeOfExpression(entry.DeclaringType), new CodePrimitiveExpression(entry.PropertyInfo.Name)); } } public override object EvaluateExpression(object target, BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context) { return GetAppSetting(entry.Expression, target.GetType(), entry.PropertyInfo.Name); } public static object GetAppSetting(string key) { string value = ConfigurationManager.AppSettings[key]; if (value == null) { throw new InvalidOperationException(SR.GetString(SR.AppSetting_not_found, key)); } return value; } public static object GetAppSetting(string key, Type targetType, string propertyName) { string value = ConfigurationManager.AppSettings[key]; if (targetType != null) { PropertyDescriptor propDesc = TypeDescriptor.GetProperties(targetType)[propertyName]; if (propDesc != null) { if (propDesc.PropertyType != typeof(string)) { TypeConverter converter = propDesc.Converter; if (converter.CanConvertFrom(typeof(string))) { return converter.ConvertFrom(value); } else { throw new InvalidOperationException(SR.GetString(SR.AppSetting_not_convertible, value, propDesc.PropertyType.Name, propDesc.Name)); } } } } if (value == null) { throw new InvalidOperationException(SR.GetString(SR.AppSetting_not_found, key)); } return value; } } } // 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
- WebPartConnectionsEventArgs.cs
- SAPICategories.cs
- QilXmlWriter.cs
- Zone.cs
- DataColumnCollection.cs
- BooleanAnimationBase.cs
- TextEditorSelection.cs
- Pair.cs
- ItemChangedEventArgs.cs
- DesignerLoader.cs
- DotExpr.cs
- StandardCommandToolStripMenuItem.cs
- HijriCalendar.cs
- VerificationException.cs
- MouseGestureValueSerializer.cs
- ProgressBar.cs
- DataPagerFieldCollection.cs
- InputLangChangeRequestEvent.cs
- CookielessData.cs
- HijriCalendar.cs
- DebugHandleTracker.cs
- ProtocolInformationWriter.cs
- Util.cs
- CoTaskMemHandle.cs
- SerialErrors.cs
- WebPartUtil.cs
- MailDefinition.cs
- CatalogZoneBase.cs
- UriTemplateQueryValue.cs
- RunInstallerAttribute.cs
- SudsWriter.cs
- FreezableCollection.cs
- METAHEADER.cs
- StylusEventArgs.cs
- SafeReversePInvokeHandle.cs
- FormView.cs
- UndirectedGraph.cs
- EnumValAlphaComparer.cs
- KoreanCalendar.cs
- NullableDecimalAverageAggregationOperator.cs
- ComboBox.cs
- TemplatePropertyEntry.cs
- AttributeAction.cs
- TextServicesLoader.cs
- UpdateEventArgs.cs
- PinProtectionHelper.cs
- EnumBuilder.cs
- _CacheStreams.cs
- ZipQueryOperator.cs
- LayoutEvent.cs
- FontResourceCache.cs
- WebPartTransformerCollection.cs
- ElapsedEventArgs.cs
- DataBinder.cs
- WebPartDisplayModeCancelEventArgs.cs
- TimeoutValidationAttribute.cs
- EnlistmentState.cs
- UserMapPath.cs
- AlphaSortedEnumConverter.cs
- odbcmetadatacolumnnames.cs
- ExpressionEditorSheet.cs
- XamlPoint3DCollectionSerializer.cs
- XmlElementAttribute.cs
- ListBase.cs
- CollectionChangeEventArgs.cs
- APCustomTypeDescriptor.cs
- ILGenerator.cs
- OracleConnection.cs
- WSTransactionSection.cs
- HtmlGenericControl.cs
- CustomWebEventKey.cs
- DataTransferEventArgs.cs
- SystemColors.cs
- ThreadWorkerController.cs
- InitializerFacet.cs
- GenericWebPart.cs
- DispatcherHooks.cs
- codemethodreferenceexpression.cs
- TableParaClient.cs
- WindowsFont.cs
- ApplicationDirectoryMembershipCondition.cs
- FolderLevelBuildProviderAppliesToAttribute.cs
- Scripts.cs
- RunInstallerAttribute.cs
- Camera.cs
- FillErrorEventArgs.cs
- TemplatedWizardStep.cs
- IdentityHolder.cs
- Trustee.cs
- SoapUnknownHeader.cs
- PolyQuadraticBezierSegment.cs
- Point4DValueSerializer.cs
- ThicknessKeyFrameCollection.cs
- DataGridViewHitTestInfo.cs
- MimeParameter.cs
- KeyBinding.cs
- MethodAccessException.cs
- PolyBezierSegment.cs
- AbsoluteQuery.cs
- Deflater.cs