Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ComponentModel / COM2Interop / COM2ExtendedTypeConverter.cs / 1305376 / COM2ExtendedTypeConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.ComponentModel.Com2Interop { using System.Diagnostics; using System; using System.ComponentModel; using System.ComponentModel.Design; using System.Drawing; using Microsoft.Win32; using System.Globalization; using System.Collections; ////// /// Base class for value editors that extend basic functionality. /// calls will be delegated to the "base value editor". /// internal class Com2ExtendedTypeConverter : TypeConverter { private TypeConverter innerConverter; public Com2ExtendedTypeConverter(TypeConverter innerConverter) { this.innerConverter = innerConverter; } public Com2ExtendedTypeConverter(Type baseType) { this.innerConverter = TypeDescriptor.GetConverter(baseType); } public TypeConverter InnerConverter { get { return innerConverter; } } public TypeConverter GetWrappedConverter(Type t) { TypeConverter converter = innerConverter; while (converter != null) { if (t.IsInstanceOfType(converter)) { return converter; } if (converter is Com2ExtendedTypeConverter) { converter = ((Com2ExtendedTypeConverter)converter).InnerConverter; } else { break; } } return null; } ////// /// Determines if this converter can convert an object in the given source /// type to the native type of the converter. /// public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (innerConverter != null) { return innerConverter.CanConvertFrom(context, sourceType); } return base.CanConvertFrom(context, sourceType); } ////// /// Determines if this converter can convert an object to the given destination /// type. /// public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if (innerConverter != null) { return innerConverter.CanConvertTo(context, destinationType); } return base.CanConvertTo(context, destinationType); } ////// /// Converts the given object to the converter's native type. /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (innerConverter != null) { return innerConverter.ConvertFrom(context, culture, value); } return base.ConvertFrom(context, culture, value); } ////// /// 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 (innerConverter != null) { return innerConverter.ConvertTo(context, culture, value, destinationType); } return base.ConvertTo(context, culture, value, destinationType); } ////// /// Creates an instance of this type given a set of property values /// for the object. This is useful for objects that are immutable, but still /// want to provide changable properties. /// public override object CreateInstance(ITypeDescriptorContext context, IDictionary propertyValues) { if (innerConverter != null) { return innerConverter.CreateInstance(context, propertyValues); } return base.CreateInstance(context, propertyValues); } ////// /// Determines if changing a value on this object should require a call to /// CreateInstance to create a new value. /// public override bool GetCreateInstanceSupported(ITypeDescriptorContext context) { if (innerConverter != null) { return innerConverter.GetCreateInstanceSupported(context); } return base.GetCreateInstanceSupported(context); } ////// /// Retrieves the set of properties for this type. By default, a type has /// does not return any properties. An easy implementation of this method /// can just call TypeDescriptor.GetProperties for the correct data type. /// public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes) { if (innerConverter != null) { return innerConverter.GetProperties(context, value, attributes); } return base.GetProperties(context, value, attributes); } ////// /// Determines if this object supports properties. By default, this /// is false. /// public override bool GetPropertiesSupported(ITypeDescriptorContext context) { if (innerConverter != null) { return innerConverter.GetPropertiesSupported(context); } return base.GetPropertiesSupported(context); } ////// /// Retrieves a collection containing a set of standard values /// for the data type this validator is designed for. This /// will return null if the data type does not support a /// standard set of values. /// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (innerConverter != null) { return innerConverter.GetStandardValues(context); } return base.GetStandardValues(context); } ////// /// Determines if the list of standard values returned from /// GetStandardValues is an exclusive list. If the list /// is exclusive, then no other values are valid, such as /// in an enum data type. If the list is not exclusive, /// then there are other valid values besides the list of /// standard values GetStandardValues provides. /// public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { if (innerConverter != null) { return innerConverter.GetStandardValuesExclusive(context); } return base.GetStandardValuesExclusive(context); } ////// /// Determines if this object supports a standard set of values /// that can be picked from a list. /// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { if (innerConverter != null) { return innerConverter.GetStandardValuesSupported(context); } return base.GetStandardValuesSupported(context); } ////// /// Determines if the given object value is valid for this type. /// public override bool IsValid(ITypeDescriptorContext context, object value) { if (innerConverter != null) { return innerConverter.IsValid(context, value); } return base.IsValid(context, 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
- ExpressionBindingsDialog.cs
- TdsParserStaticMethods.cs
- EncodingInfo.cs
- ElementsClipboardData.cs
- WindowsFormsSectionHandler.cs
- RegisteredExpandoAttribute.cs
- ZipIOExtraField.cs
- Context.cs
- SqlDependency.cs
- ClonableStack.cs
- XmlWrappingReader.cs
- SqlVersion.cs
- VersionedStream.cs
- XmlIterators.cs
- Expressions.cs
- Array.cs
- TrackingCondition.cs
- EntityFrameworkVersions.cs
- SystemInformation.cs
- Domain.cs
- BaseCodeDomTreeGenerator.cs
- TypeListConverter.cs
- ArgumentNullException.cs
- FixedHighlight.cs
- XmlDataSource.cs
- LocalIdKeyIdentifierClause.cs
- WebRequestModulesSection.cs
- WebContentFormatHelper.cs
- HealthMonitoringSection.cs
- SerializationObjectManager.cs
- OdbcEnvironmentHandle.cs
- IdentityHolder.cs
- ArcSegment.cs
- RunInstallerAttribute.cs
- ProviderCommandInfoUtils.cs
- HandleRef.cs
- JoinSymbol.cs
- ClientSettingsSection.cs
- XmlQueryRuntime.cs
- DataView.cs
- ChangeNode.cs
- RowCache.cs
- CharacterMetrics.cs
- ScrollableControl.cs
- PagePropertiesChangingEventArgs.cs
- TextEditor.cs
- ToolStripPanelRenderEventArgs.cs
- AutomationAttributeInfo.cs
- WebServiceReceiveDesigner.cs
- SeekableMessageNavigator.cs
- GraphicsPathIterator.cs
- _SslSessionsCache.cs
- SerializationTrace.cs
- ToolStripProgressBar.cs
- XmlAtomicValue.cs
- RequestBringIntoViewEventArgs.cs
- Utils.cs
- EntitySetDataBindingList.cs
- GeneralTransform2DTo3D.cs
- BufferedStream.cs
- ClickablePoint.cs
- SvcMapFile.cs
- IndexedEnumerable.cs
- peersecurityelement.cs
- PersonalizationAdministration.cs
- _SSPISessionCache.cs
- OleDbConnectionFactory.cs
- SuppressIldasmAttribute.cs
- SymbolUsageManager.cs
- HttpsHostedTransportConfiguration.cs
- TouchFrameEventArgs.cs
- odbcmetadatacollectionnames.cs
- WebProxyScriptElement.cs
- safemediahandle.cs
- Interlocked.cs
- FlowPosition.cs
- XomlCompilerResults.cs
- SafeEventLogWriteHandle.cs
- User.cs
- PartialTrustVisibleAssembliesSection.cs
- XmlSchemaObjectTable.cs
- ConfigDefinitionUpdates.cs
- LoginCancelEventArgs.cs
- COM2ComponentEditor.cs
- PnrpPermission.cs
- SplineQuaternionKeyFrame.cs
- ComPlusThreadInitializer.cs
- DataGridAutoGeneratingColumnEventArgs.cs
- HttpServerUtilityBase.cs
- PropertyInformation.cs
- WebPartDesigner.cs
- ImageAutomationPeer.cs
- FilterQuery.cs
- DataSourceSelectArguments.cs
- HyperLinkField.cs
- CacheMemory.cs
- AutoGeneratedFieldProperties.cs
- DetailsView.cs
- safelink.cs
- X509Extension.cs