Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / FontUnitConverter.cs / 1 / FontUnitConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Globalization; using System.Reflection; using System.Security.Permissions; using System.Web.Util; ////// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class FontUnitConverter : TypeConverter { private StandardValuesCollection values; ///Converts a ///to and from a specified data type. /// public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } else { return base.CanConvertFrom(context, sourceType); } } ///Determines if the specified data type can be converted to a ///. /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value == null) return null; string stringValue = value as string; if (stringValue != null) { string textValue = stringValue.Trim(); if (textValue.Length == 0) { return FontUnit.Empty; } return FontUnit.Parse(textValue, culture); } else { return base.ConvertFrom(context, culture, value); } } ///Converts the specified ///into a . /// /// Returns a value indicating whether the converter can /// convert to the specified destination type. /// public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if ((destinationType == typeof(string)) || (destinationType == typeof(InstanceDescriptor))) { return true; } else { return base.CanConvertTo(context, destinationType); } } ////// public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType == typeof(string)) { if ((value == null) || (((FontUnit)value).Type == FontSize.NotSet)) return String.Empty; else return ((FontUnit)value).ToString(culture); } else if ((destinationType == typeof(InstanceDescriptor)) && (value != null)) { FontUnit u = (FontUnit)value; MemberInfo member = null; object[] args = null; if (u.IsEmpty) { member = typeof(FontUnit).GetField("Empty"); } else if (u.Type != FontSize.AsUnit) { string fieldName = null; switch (u.Type) { case FontSize.Smaller: fieldName = "Smaller"; break; case FontSize.Larger: fieldName = "Larger"; break; case FontSize.XXSmall: fieldName = "XXSmall"; break; case FontSize.XSmall: fieldName = "XSmall"; break; case FontSize.Small: fieldName = "Small"; break; case FontSize.Medium: fieldName = "Medium"; break; case FontSize.Large: fieldName = "Large"; break; case FontSize.XLarge: fieldName = "XLarge"; break; case FontSize.XXLarge: fieldName = "XXLarge"; break; } Debug.Assert(fieldName != null, "Invalid FontSize type"); if (fieldName != null) { member = typeof(FontUnit).GetField(fieldName); } } else { member = typeof(FontUnit).GetConstructor(new Type[] { typeof(Unit) }); args = new object[] { u.Unit }; } Debug.Assert(member != null, "Looks like we're missing FontUnit static fields or FontUnit::ctor(Unit)"); if (member != null) { return new InstanceDescriptor(member, args); } else { return null; } } else { return base.ConvertTo(context, culture, value, destinationType); } } ///Converts the specified ///into the specified . /// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (values == null) { object[] namedUnits = new object[] { FontUnit.Smaller, FontUnit.Larger, FontUnit.XXSmall, FontUnit.XSmall, FontUnit.Small, FontUnit.Medium, FontUnit.Large, FontUnit.XLarge, FontUnit.XXLarge }; values = new StandardValuesCollection(namedUnits); } return values; } ///Returns a ////// containing standard values. /// public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return false; } ///Indicates whether the specified context contains exclusive standard /// values. ////// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } } }Indicates whether the specified context contains suppurted standard /// values. ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ToolZone.cs
- SafeThreadHandle.cs
- SelectionGlyphBase.cs
- HighlightComponent.cs
- NetworkInterface.cs
- MinimizableAttributeTypeConverter.cs
- TableLayout.cs
- DataGridItemCollection.cs
- TabItemAutomationPeer.cs
- NameHandler.cs
- ThrowHelper.cs
- CodeNamespaceCollection.cs
- MDIClient.cs
- X500Name.cs
- UnsafeNativeMethods.cs
- xmlNames.cs
- TableCellCollection.cs
- SmtpClient.cs
- EventPrivateKey.cs
- PinnedBufferMemoryStream.cs
- DesignTimeDataBinding.cs
- OutputWindow.cs
- RoleManagerSection.cs
- DBConcurrencyException.cs
- SafeMILHandle.cs
- WorkerRequest.cs
- SettingsPropertyValueCollection.cs
- AnnotationResource.cs
- DesignerWebPartChrome.cs
- ActivationServices.cs
- FlowDocumentScrollViewer.cs
- CompModSwitches.cs
- SingleTagSectionHandler.cs
- SignatureDescription.cs
- NullableFloatSumAggregationOperator.cs
- EnterpriseServicesHelper.cs
- CacheDependency.cs
- ConfigXmlWhitespace.cs
- MasterPageBuildProvider.cs
- XPathConvert.cs
- ExpressionPrefixAttribute.cs
- CodeMemberProperty.cs
- BypassElementCollection.cs
- EditingContext.cs
- SpecularMaterial.cs
- XPathAncestorIterator.cs
- ObfuscateAssemblyAttribute.cs
- EditCommandColumn.cs
- ExecutedRoutedEventArgs.cs
- externdll.cs
- EntityProviderFactory.cs
- DiscoveryReference.cs
- DataPagerFieldItem.cs
- WebZone.cs
- ClipboardProcessor.cs
- SerializeAbsoluteContext.cs
- SQLSingle.cs
- LOSFormatter.cs
- RepeatButton.cs
- XmlQueryContext.cs
- CompilationPass2Task.cs
- DSACryptoServiceProvider.cs
- WithParamAction.cs
- DataGridViewCellConverter.cs
- CharEnumerator.cs
- GridViewCommandEventArgs.cs
- TraceEventCache.cs
- PropertyPushdownHelper.cs
- WebDisplayNameAttribute.cs
- FixedDocumentSequencePaginator.cs
- ValueType.cs
- ComplexPropertyEntry.cs
- SchemaCollectionCompiler.cs
- DBAsyncResult.cs
- XmlLanguage.cs
- TransformerConfigurationWizardBase.cs
- FilterQueryOptionExpression.cs
- DesignTimeVisibleAttribute.cs
- CodeIdentifier.cs
- Properties.cs
- ValidatingPropertiesEventArgs.cs
- WebBrowserBase.cs
- WebResponse.cs
- OleDbPermission.cs
- ContainerControl.cs
- AxHost.cs
- ParseNumbers.cs
- AncillaryOps.cs
- MarshalDirectiveException.cs
- PermissionSetEnumerator.cs
- XPathDocumentIterator.cs
- AssemblyCacheEntry.cs
- DelayedRegex.cs
- DataGridViewComboBoxColumn.cs
- ResourceBinder.cs
- GridViewColumnCollectionChangedEventArgs.cs
- PanelStyle.cs
- AmbientLight.cs
- XPathAncestorIterator.cs
- FactoryMaker.cs