Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Data / System / Data / DefaultValueTypeConverter.cs / 1 / 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. //------------------------------------------------------------------------------ // // 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
- AttachedAnnotation.cs
- GenerateScriptTypeAttribute.cs
- assemblycache.cs
- TypedReference.cs
- SystemIPv4InterfaceProperties.cs
- parserscommon.cs
- UrlAuthorizationModule.cs
- OleDbTransaction.cs
- TransactionTable.cs
- ManagementExtension.cs
- ValidateNames.cs
- ToolStripSystemRenderer.cs
- IncrementalHitTester.cs
- ApplicationException.cs
- WebAdminConfigurationHelper.cs
- FunctionGenerator.cs
- ItemDragEvent.cs
- SmtpLoginAuthenticationModule.cs
- HiddenFieldPageStatePersister.cs
- AvtEvent.cs
- DesignerActionKeyboardBehavior.cs
- QuinticEase.cs
- SimpleMailWebEventProvider.cs
- MD5.cs
- XmlWrappingWriter.cs
- FreeFormDragDropManager.cs
- HtmlInputControl.cs
- AuthenticationSection.cs
- PrintDialogException.cs
- SignatureHelper.cs
- WebServicesDescriptionAttribute.cs
- pingexception.cs
- TaskForm.cs
- KeyValuePair.cs
- FrameworkContentElementAutomationPeer.cs
- PackageRelationship.cs
- SupportingTokenAuthenticatorSpecification.cs
- EmptyStringExpandableObjectConverter.cs
- WindowsSecurityTokenAuthenticator.cs
- ValidatedControlConverter.cs
- SqlUtils.cs
- SingleAnimationBase.cs
- ListParagraph.cs
- SessionIDManager.cs
- ZoomingMessageFilter.cs
- Region.cs
- RedirectionProxy.cs
- RelatedImageListAttribute.cs
- RootBrowserWindowAutomationPeer.cs
- InfoCardRSAOAEPKeyExchangeFormatter.cs
- SpecialTypeDataContract.cs
- ReadOnlyPropertyMetadata.cs
- EdmPropertyAttribute.cs
- CacheSection.cs
- ToolStripPanelSelectionBehavior.cs
- SafeProcessHandle.cs
- QueryExpr.cs
- InvokeFunc.cs
- ExpressionBuilderCollection.cs
- Section.cs
- PassportAuthentication.cs
- PropertyKey.cs
- Transform3D.cs
- DisplayInformation.cs
- sqlnorm.cs
- DetailsView.cs
- DateTimeValueSerializer.cs
- _StreamFramer.cs
- ColorAnimation.cs
- SystemIcmpV4Statistics.cs
- AuthenticationServiceManager.cs
- AnimatedTypeHelpers.cs
- WebHttpBindingCollectionElement.cs
- DetailsViewInsertedEventArgs.cs
- ClientEventManager.cs
- ServerIdentity.cs
- XmlWhitespace.cs
- AspNetHostingPermission.cs
- ProcessHostFactoryHelper.cs
- CustomCategoryAttribute.cs
- StylusPoint.cs
- SqlTrackingQuery.cs
- BrowserCapabilitiesFactoryBase.cs
- ContainerParaClient.cs
- TaskHelper.cs
- EdmComplexTypeAttribute.cs
- XmlLoader.cs
- ThemeInfoAttribute.cs
- ObjectStateEntry.cs
- SystemGatewayIPAddressInformation.cs
- PeerCustomResolverElement.cs
- LabelLiteral.cs
- DispatcherHooks.cs
- TemplateManager.cs
- GestureRecognitionResult.cs
- Pair.cs
- ServerType.cs
- SectionVisual.cs
- MsdtcClusterUtils.cs
- AssemblyInfo.cs