Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / DefaultValueTypeConverter.cs / 1305376 / DefaultValueTypeConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- /* */ namespace System.Data { using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Globalization; ////// internal sealed class DefaultValueTypeConverter : StringConverter { private static string nullString = "Provides a type /// converter that can be used to populate a list box with available types. ///"; private static string dbNullString = " "; // converter classes should have public ctor public DefaultValueTypeConverter() { } public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType == null) { throw new ArgumentNullException("destinationType"); } if (destinationType == typeof(string)) { if (value == null) { return nullString; } else if (value == DBNull.Value) { return dbNullString; } } return base.ConvertTo(context, culture, value, destinationType); } public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value != null && value.GetType() == typeof(string)) { string strValue = (string)value; if (string.Compare(strValue, nullString, StringComparison.OrdinalIgnoreCase) == 0) return null; else if (string.Compare(strValue, dbNullString, StringComparison.OrdinalIgnoreCase) == 0) return DBNull.Value; } return base.ConvertFrom(context, culture, 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
- PartialCachingControl.cs
- VectorKeyFrameCollection.cs
- NativeCppClassAttribute.cs
- XmlParserContext.cs
- Polygon.cs
- XmlIterators.cs
- MarginCollapsingState.cs
- PropertyCollection.cs
- InputLanguageSource.cs
- objectquery_tresulttype.cs
- InstanceHandleReference.cs
- PathFigureCollectionConverter.cs
- UrlParameterWriter.cs
- BaseParser.cs
- WebContext.cs
- OleDbStruct.cs
- GradientSpreadMethodValidation.cs
- FieldDescriptor.cs
- WindowsFormsHost.cs
- PageBreakRecord.cs
- TypeToStringValueConverter.cs
- DataGridTextBoxColumn.cs
- TableRow.cs
- EdmEntityTypeAttribute.cs
- ContentElement.cs
- AutoGeneratedFieldProperties.cs
- ProtocolsSection.cs
- BindableAttribute.cs
- HttpClientChannel.cs
- CheckBox.cs
- Int16Converter.cs
- IImplicitResourceProvider.cs
- Query.cs
- XmlQuerySequence.cs
- WindowsTokenRoleProvider.cs
- LoadedOrUnloadedOperation.cs
- InputReportEventArgs.cs
- TypeUtil.cs
- MutexSecurity.cs
- RoutedEventConverter.cs
- XmlSchemaCollection.cs
- WrappedIUnknown.cs
- ImageMapEventArgs.cs
- OptimalTextSource.cs
- StylusCollection.cs
- ScalarOps.cs
- LogExtent.cs
- SqlInternalConnectionSmi.cs
- DateTimeFormatInfoScanner.cs
- CellConstantDomain.cs
- DataPagerFieldCommandEventArgs.cs
- CodeNamespaceCollection.cs
- TypeUnloadedException.cs
- DataMemberListEditor.cs
- SamlConstants.cs
- ObjectDataSourceFilteringEventArgs.cs
- TextEditor.cs
- FixedSOMTableRow.cs
- ComplexBindingPropertiesAttribute.cs
- HostingEnvironment.cs
- EditCommandColumn.cs
- TemplateEditingVerb.cs
- AuthenticationServiceManager.cs
- HttpTransportSecurityElement.cs
- CodeSubDirectoriesCollection.cs
- AccessViolationException.cs
- Part.cs
- HelpProvider.cs
- GeneralTransform3DCollection.cs
- RenderingBiasValidation.cs
- LoadGrammarCompletedEventArgs.cs
- securitycriticaldata.cs
- RemotingAttributes.cs
- FilteredReadOnlyMetadataCollection.cs
- Expr.cs
- FilePrompt.cs
- PeerPresenceInfo.cs
- MarshalDirectiveException.cs
- XmlReflectionMember.cs
- SystemBrushes.cs
- BrowserCapabilitiesFactory.cs
- HttpAsyncResult.cs
- LineServicesRun.cs
- GridToolTip.cs
- TypeInitializationException.cs
- DragCompletedEventArgs.cs
- BufferModeSettings.cs
- XmlSchemaComplexContent.cs
- ImportContext.cs
- LoadRetryHandler.cs
- ScalarType.cs
- SqlNamer.cs
- ADRole.cs
- BrushMappingModeValidation.cs
- Lazy.cs
- DateTimeConverter.cs
- PageRequestManager.cs
- TableLayoutRowStyleCollection.cs
- SolidColorBrush.cs
- BitmapMetadataEnumerator.cs