Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Core / CSharp / System / Windows / DurationConverter.cs / 1 / DurationConverter.cs
//------------------------------------------------------------------------------ // Microsoft Windows Client Platform // Copyright (c) Microsoft Corporation, 2004 // // File: DurationConverter.cs //----------------------------------------------------------------------------- using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Security; namespace System.Windows { ////// Provides a type converter to convert Duration to and from other representations. /// public class DurationConverter : TypeConverter { ////// CanConvertFrom - Returns whether or not this class can convert from a given type /// ///public override bool CanConvertFrom(ITypeDescriptorContext td, Type t) { if (t == typeof(string)) { return true; } else { return false; } } /// /// TypeConverter method override. /// /// ITypeDescriptorContext /// Type to convert to ///true if conversion is possible ///public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if ( destinationType == typeof(InstanceDescriptor) || destinationType == typeof(string)) { return true; } else { return false; } } /// /// ConvertFrom /// ///public override object ConvertFrom( ITypeDescriptorContext td, CultureInfo cultureInfo, object value) { string stringValue = value as string; // Override the converter for sentinel values if (stringValue != null) { stringValue = stringValue.Trim(); if (stringValue == "Automatic") { return Duration.Automatic; } else if (stringValue == "Forever") { return Duration.Forever; } } TimeSpan duration = TimeSpan.Zero; if(_timeSpanConverter == null) { _timeSpanConverter = new TimeSpanConverter(); } duration = (TimeSpan)_timeSpanConverter.ConvertFrom(td, cultureInfo, value); return new Duration(duration); } /// /// TypeConverter method implementation. /// /// ITypeDescriptorContext /// current culture (see CLR specs) /// value to convert from /// Type to convert to ///converted value ////// /// Critical: calls InstanceDescriptor ctor which LinkDemands /// PublicOK: can only make an InstanceDescriptor for Duration, not an arbitrary class /// [SecurityCritical] public override object ConvertTo( ITypeDescriptorContext context, CultureInfo cultureInfo, object value, Type destinationType) { if (destinationType != null && value is Duration) { Duration durationValue = (Duration)value; if (destinationType == typeof(InstanceDescriptor)) { MemberInfo mi; if (durationValue.HasTimeSpan) { mi = typeof(Duration).GetConstructor(new Type[] { typeof(TimeSpan) }); return new InstanceDescriptor(mi, new object[] { durationValue.TimeSpan }); } else if (durationValue == Duration.Forever) { mi = typeof(Duration).GetProperty("Forever"); return new InstanceDescriptor(mi, null); } else { Debug.Assert(durationValue == Duration.Automatic); // Only other legal duration type mi = typeof(Duration).GetProperty("Automatic"); return new InstanceDescriptor(mi, null); } } else if (destinationType == typeof(string)) { return durationValue.ToString(); } } // Pass unhandled cases to base class (which will throw exceptions for null value or destinationType.) return base.ConvertTo(context, cultureInfo, value, destinationType); } private static TimeSpanConverter _timeSpanConverter; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Windows Client Platform // Copyright (c) Microsoft Corporation, 2004 // // File: DurationConverter.cs //----------------------------------------------------------------------------- using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Security; namespace System.Windows { ////// Provides a type converter to convert Duration to and from other representations. /// public class DurationConverter : TypeConverter { ////// CanConvertFrom - Returns whether or not this class can convert from a given type /// ///public override bool CanConvertFrom(ITypeDescriptorContext td, Type t) { if (t == typeof(string)) { return true; } else { return false; } } /// /// TypeConverter method override. /// /// ITypeDescriptorContext /// Type to convert to ///true if conversion is possible ///public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if ( destinationType == typeof(InstanceDescriptor) || destinationType == typeof(string)) { return true; } else { return false; } } /// /// ConvertFrom /// ///public override object ConvertFrom( ITypeDescriptorContext td, CultureInfo cultureInfo, object value) { string stringValue = value as string; // Override the converter for sentinel values if (stringValue != null) { stringValue = stringValue.Trim(); if (stringValue == "Automatic") { return Duration.Automatic; } else if (stringValue == "Forever") { return Duration.Forever; } } TimeSpan duration = TimeSpan.Zero; if(_timeSpanConverter == null) { _timeSpanConverter = new TimeSpanConverter(); } duration = (TimeSpan)_timeSpanConverter.ConvertFrom(td, cultureInfo, value); return new Duration(duration); } /// /// TypeConverter method implementation. /// /// ITypeDescriptorContext /// current culture (see CLR specs) /// value to convert from /// Type to convert to ///converted value ////// /// Critical: calls InstanceDescriptor ctor which LinkDemands /// PublicOK: can only make an InstanceDescriptor for Duration, not an arbitrary class /// [SecurityCritical] public override object ConvertTo( ITypeDescriptorContext context, CultureInfo cultureInfo, object value, Type destinationType) { if (destinationType != null && value is Duration) { Duration durationValue = (Duration)value; if (destinationType == typeof(InstanceDescriptor)) { MemberInfo mi; if (durationValue.HasTimeSpan) { mi = typeof(Duration).GetConstructor(new Type[] { typeof(TimeSpan) }); return new InstanceDescriptor(mi, new object[] { durationValue.TimeSpan }); } else if (durationValue == Duration.Forever) { mi = typeof(Duration).GetProperty("Forever"); return new InstanceDescriptor(mi, null); } else { Debug.Assert(durationValue == Duration.Automatic); // Only other legal duration type mi = typeof(Duration).GetProperty("Automatic"); return new InstanceDescriptor(mi, null); } } else if (destinationType == typeof(string)) { return durationValue.ToString(); } } // Pass unhandled cases to base class (which will throw exceptions for null value or destinationType.) return base.ConvertTo(context, cultureInfo, value, destinationType); } private static TimeSpanConverter _timeSpanConverter; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- FieldNameLookup.cs
- DateTimeOffset.cs
- PrinterUnitConvert.cs
- ProtocolViolationException.cs
- CodeTypeDeclaration.cs
- NameValuePermission.cs
- XmlSchemaSimpleType.cs
- StructuredTypeEmitter.cs
- InstanceDataCollectionCollection.cs
- TerminatingOperationBehavior.cs
- AdRotator.cs
- LineSegment.cs
- WebServiceParameterData.cs
- SByteConverter.cs
- SqlBuilder.cs
- KeyValuePair.cs
- TextRunProperties.cs
- DoubleUtil.cs
- PngBitmapDecoder.cs
- AssertSection.cs
- X509Certificate2.cs
- SliderAutomationPeer.cs
- IFormattable.cs
- IntSecurity.cs
- TextControl.cs
- SubqueryRules.cs
- LinearKeyFrames.cs
- ReplyAdapterChannelListener.cs
- XmlLinkedNode.cs
- ModuleElement.cs
- LoginCancelEventArgs.cs
- PixelShader.cs
- CompositeCollectionView.cs
- SecurityTokenTypes.cs
- CellParagraph.cs
- MaskedTextProvider.cs
- SqlNodeTypeOperators.cs
- ConfigurationElementProperty.cs
- AssociationSetMetadata.cs
- DataPagerField.cs
- GreaterThan.cs
- CodeIdentifier.cs
- DesignTimeResourceProviderFactoryAttribute.cs
- CommonXSendMessage.cs
- DispatcherExceptionFilterEventArgs.cs
- SchemaDeclBase.cs
- XmlSchema.cs
- ErrorWebPart.cs
- ImageDrawing.cs
- KeyNotFoundException.cs
- X509ClientCertificateCredentialsElement.cs
- UpdateManifestForBrowserApplication.cs
- DataGridViewTopRowAccessibleObject.cs
- SmtpTransport.cs
- BaseCollection.cs
- ConditionalAttribute.cs
- HtmlInputFile.cs
- DocumentViewerBase.cs
- AndCondition.cs
- Calendar.cs
- Transform3D.cs
- _AcceptOverlappedAsyncResult.cs
- TableItemPattern.cs
- ControllableStoryboardAction.cs
- ReadOnlyMetadataCollection.cs
- RegistryKey.cs
- X509ChainElement.cs
- GroupBox.cs
- CodeThrowExceptionStatement.cs
- SubpageParaClient.cs
- CacheRequest.cs
- ConsoleEntryPoint.cs
- ActivityCodeDomSerializer.cs
- PropertyValueEditor.cs
- PrintSystemException.cs
- Nodes.cs
- FixedSOMPage.cs
- ToolCreatedEventArgs.cs
- PolyBezierSegment.cs
- NameTable.cs
- NotifyIcon.cs
- SqlFunctionAttribute.cs
- ImportCatalogPart.cs
- WinInet.cs
- safex509handles.cs
- OdbcConnectionOpen.cs
- ViewGenResults.cs
- CodeEntryPointMethod.cs
- TypeSystem.cs
- InputBuffer.cs
- DataObjectAttribute.cs
- FlowDocumentPaginator.cs
- SqlDataAdapter.cs
- Logging.cs
- EncodingDataItem.cs
- DeriveBytes.cs
- AssemblyNameProxy.cs
- MaskedTextBox.cs
- HierarchicalDataTemplate.cs
- WorkflowLayouts.cs