Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / 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. // //[....] //[....] //[....] //----------------------------------------------------------------------------- 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CheckBoxStandardAdapter.cs
- GenericIdentity.cs
- FixedElement.cs
- ConstraintEnumerator.cs
- IDictionary.cs
- MenuTracker.cs
- SqlSelectStatement.cs
- GifBitmapEncoder.cs
- FixedTextSelectionProcessor.cs
- Pkcs7Signer.cs
- EntityConnectionStringBuilderItem.cs
- ObjectHandle.cs
- SettingsAttributes.cs
- DataFormats.cs
- StoragePropertyMapping.cs
- DelimitedListTraceListener.cs
- ChtmlCommandAdapter.cs
- EmptyImpersonationContext.cs
- _UriSyntax.cs
- CutCopyPasteHelper.cs
- FixedTextPointer.cs
- InternalUserCancelledException.cs
- ReadWriteSpinLock.cs
- BooleanExpr.cs
- HttpRequestBase.cs
- PropertyMapper.cs
- Splitter.cs
- CustomAttributeBuilder.cs
- RegionData.cs
- StructuralObject.cs
- WebBrowserPermission.cs
- WindowInteropHelper.cs
- CodeObject.cs
- BulletedList.cs
- MatrixIndependentAnimationStorage.cs
- WindowsContainer.cs
- XmlNotation.cs
- SubordinateTransaction.cs
- HorizontalAlignConverter.cs
- IndexedString.cs
- CombinedHttpChannel.cs
- DataServiceClientException.cs
- XmlTextReaderImpl.cs
- StylusDownEventArgs.cs
- FieldReference.cs
- ProvidePropertyAttribute.cs
- PageVisual.cs
- ViewStateException.cs
- KeyValuePair.cs
- HtmlForm.cs
- TransformerInfoCollection.cs
- HMACRIPEMD160.cs
- OracleNumber.cs
- SiblingIterators.cs
- IncomingWebRequestContext.cs
- _NegoStream.cs
- FormViewDeletedEventArgs.cs
- SharedConnectionWorkflowTransactionService.cs
- DecimalConstantAttribute.cs
- Condition.cs
- TextBoxAutoCompleteSourceConverter.cs
- CodeNamespaceCollection.cs
- XsdDuration.cs
- EncoderBestFitFallback.cs
- DataSourceXmlTextReader.cs
- NavigationExpr.cs
- HiddenFieldPageStatePersister.cs
- XmlQueryContext.cs
- FacetChecker.cs
- CharacterMetricsDictionary.cs
- Module.cs
- ToolStripContentPanel.cs
- ToolBar.cs
- AlternateViewCollection.cs
- DataGrid.cs
- ExtractorMetadata.cs
- SendSecurityHeaderElementContainer.cs
- TouchFrameEventArgs.cs
- ObjectListItemCollection.cs
- ControlTemplate.cs
- bindurihelper.cs
- MLangCodePageEncoding.cs
- ToolStripRendererSwitcher.cs
- ContextMenu.cs
- WorkflowEnvironment.cs
- infer.cs
- ArgumentNullException.cs
- FunctionMappingTranslator.cs
- HtmlInputReset.cs
- CompensationParticipant.cs
- _ReceiveMessageOverlappedAsyncResult.cs
- EventLogStatus.cs
- ElementsClipboardData.cs
- Glyph.cs
- DynamicResourceExtensionConverter.cs
- SoapServerMethod.cs
- SystemResourceKey.cs
- DataRowCollection.cs
- versioninfo.cs
- HttpPostProtocolReflector.cs