Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / RelationshipConverter.cs / 1 / RelationshipConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data { using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Globalization; sealed internal class RelationshipConverter : ExpandableObjectConverter { // converter classes should have public ctor public RelationshipConverter() { } ////// public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if (destinationType == typeof(InstanceDescriptor)) { return true; } return base.CanConvertTo(context, destinationType); } ///Gets a value indicating whether this converter can /// convert an object to the given destination type using the context. ////// Converts the given object to another type. The most common types to convert /// are to and from a string object. The default implementation will make a call /// to ToString on the object if the object is valid and if the destination /// type is string. If this cannot convert to the desitnation type, this will /// throw a NotSupportedException. /// public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType == null) { throw new ArgumentNullException("destinationType"); } System.Reflection.ConstructorInfo ctor = null; object[] values = null; if (destinationType == typeof(InstanceDescriptor) && value is DataRelation) { DataRelation rel = (DataRelation) value; DataTable parentTable = rel.ParentKey.Table; DataTable childTable = rel.ChildKey.Table; if (System.Data.Common.ADP.IsEmpty(parentTable.Namespace) && System.Data.Common.ADP.IsEmpty(childTable.Namespace)) { ctor = typeof(DataRelation).GetConstructor(new Type[] { typeof(string) /*relationName*/, typeof(string) /*parentTableName*/, typeof(string) /*childTableName */, typeof(string[]) /*parentColumnNames */, typeof(string[]) /*childColumnNames*/, typeof(bool) /*nested*/ } ); values = new object[] { rel.RelationName, rel.ParentKey.Table.TableName, rel.ChildKey.Table.TableName,rel.ParentColumnNames, rel.ChildColumnNames, rel.Nested }; } else { ctor = typeof(DataRelation).GetConstructor(new Type[] { typeof(string)/*relationName*/, typeof(string)/*parentTableName*/, typeof(string)/*parentTableNamespace*/, typeof(string)/*childTableName */, typeof(string)/*childTableNamespace */, typeof(string[])/*parentColumnNames */, typeof(string[]) /*childColumnNames*/, typeof(bool) /*nested*/} ); values = new object[] { rel.RelationName, rel.ParentKey.Table.TableName, rel.ParentKey.Table.Namespace, rel.ChildKey.Table.TableName, rel.ChildKey.Table.Namespace, rel.ParentColumnNames, rel.ChildColumnNames, rel.Nested }; } return new InstanceDescriptor(ctor, values); } return base.ConvertTo(context, culture, value, destinationType); } } } // 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
- RequestCacheValidator.cs
- ActivityWithResultValueSerializer.cs
- AndCondition.cs
- TextAction.cs
- PromptStyle.cs
- SizeLimitedCache.cs
- AspProxy.cs
- NotSupportedException.cs
- XXXOnTypeBuilderInstantiation.cs
- CommandDevice.cs
- SynchronizingStream.cs
- BitConverter.cs
- TreeViewTemplateSelector.cs
- RuleConditionDialog.Designer.cs
- AspNetPartialTrustHelpers.cs
- _FixedSizeReader.cs
- SafeMarshalContext.cs
- RegexBoyerMoore.cs
- DataServiceStreamProviderWrapper.cs
- ColorIndependentAnimationStorage.cs
- PersonalizationStateQuery.cs
- IsolatedStorageFilePermission.cs
- InstanceDescriptor.cs
- TypeLibConverter.cs
- EditingScope.cs
- HttpPostedFile.cs
- RegexStringValidator.cs
- AutomationProperty.cs
- SoapEnvelopeProcessingElement.cs
- DataGridViewDataConnection.cs
- OutputCacheSettingsSection.cs
- addressfiltermode.cs
- LinqDataSourceStatusEventArgs.cs
- EntityEntry.cs
- ApplicationCommands.cs
- DispatcherExceptionFilterEventArgs.cs
- ConsumerConnectionPoint.cs
- ProtectedProviderSettings.cs
- ConnectionPointCookie.cs
- FullTextLine.cs
- CodeTypeConstructor.cs
- InfoCardRSAPKCS1SignatureDeformatter.cs
- DataGridViewRow.cs
- InvalidCastException.cs
- ToolStripCodeDomSerializer.cs
- TextTreeUndoUnit.cs
- precedingquery.cs
- NamespaceQuery.cs
- NavigationService.cs
- CdpEqualityComparer.cs
- StrokeCollectionDefaultValueFactory.cs
- ExpressionBindingCollection.cs
- XamlStackWriter.cs
- ContentControl.cs
- KeyMatchBuilder.cs
- FileDialog_Vista_Interop.cs
- XmlSchemaComplexContent.cs
- followingsibling.cs
- AttributeCollection.cs
- DecoderBestFitFallback.cs
- PerformanceCounterCategory.cs
- PixelFormat.cs
- ScrollContentPresenter.cs
- ProviderUtil.cs
- sortedlist.cs
- DataErrorValidationRule.cs
- FunctionMappingTranslator.cs
- ParamArrayAttribute.cs
- metadatamappinghashervisitor.hashsourcebuilder.cs
- StrongNamePublicKeyBlob.cs
- AccessControlEntry.cs
- CultureData.cs
- DelegateTypeInfo.cs
- RoleManagerEventArgs.cs
- OdbcHandle.cs
- SkinIDTypeConverter.cs
- relpropertyhelper.cs
- Storyboard.cs
- DataControlCommands.cs
- BaseParaClient.cs
- CallbackValidatorAttribute.cs
- EdmValidator.cs
- MatrixCamera.cs
- BamlResourceDeserializer.cs
- GeometryHitTestParameters.cs
- ObjectDataSourceFilteringEventArgs.cs
- SmtpFailedRecipientsException.cs
- HwndTarget.cs
- DataSvcMapFile.cs
- ExcCanonicalXml.cs
- GZipObjectSerializer.cs
- FillRuleValidation.cs
- UnsupportedPolicyOptionsException.cs
- HttpModuleCollection.cs
- KerberosTicketHashIdentifierClause.cs
- BasePropertyDescriptor.cs
- TemplateXamlParser.cs
- AppDomainUnloadedException.cs
- SourceSwitch.cs
- TreeNodeConverter.cs