Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ComponentModel / COM2Interop / COM2EnumConverter.cs / 1305376 / COM2EnumConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms.ComponentModel.Com2Interop { using System.Diagnostics; using System; using System.ComponentModel; using System.Drawing; using System.Collections; using Microsoft.Win32; using System.Globalization; internal class Com2EnumConverter : TypeConverter { internal readonly Com2Enum com2Enum; private StandardValuesCollection values; public Com2EnumConverter(Com2Enum enumObj) { com2Enum = enumObj; } ////// /// 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 (sourceType == typeof(string)) { return true; } return base.CanConvertFrom(context, sourceType); } public override bool CanConvertTo(ITypeDescriptorContext context, Type destType) { if (base.CanConvertTo(context, destType)) { return true; } return destType.IsEnum; } ////// /// Converts the given object to the converter's native type. /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value is string) { return com2Enum.FromString((string)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 (destinationType == null) { throw new ArgumentNullException("destinationType"); } if (destinationType == typeof(string)) { if (value != null) { string str = com2Enum.ToString(value); return (str == null ? "" : str); } } if (destinationType.IsEnum) { return Enum.ToObject(destinationType, value); } return base.ConvertTo(context, culture, value, destinationType); } ////// /// 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 (values == null) { object[] objValues = com2Enum.Values; if (objValues != null) { values = new StandardValuesCollection(objValues); } } return values; } ////// /// 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) { return com2Enum.IsStrictEnum; } ////// /// Determines if this object supports a standard set of values /// that can be picked from a list. /// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } ////// /// Determines if the given object value is valid for this type. /// public override bool IsValid(ITypeDescriptorContext context, object value) { string strValue = com2Enum.ToString(value); return strValue != null && strValue.Length > 0; } public void RefreshValues() { this.values = null; } } } // 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
- BinaryMessageEncoder.cs
- DbReferenceCollection.cs
- PlatformCulture.cs
- HMACSHA512.cs
- WebResourceAttribute.cs
- ValidateNames.cs
- Context.cs
- SubclassTypeValidator.cs
- HtmlEmptyTagControlBuilder.cs
- DeferredTextReference.cs
- SvcMapFileSerializer.cs
- RouteValueDictionary.cs
- QilReference.cs
- MobileRedirect.cs
- QueryCursorEventArgs.cs
- Internal.cs
- __ConsoleStream.cs
- MissingFieldException.cs
- UnsafeNativeMethods.cs
- X509RecipientCertificateServiceElement.cs
- BindingExpression.cs
- TextFormattingConverter.cs
- SemanticResultKey.cs
- CharacterHit.cs
- ModelItemDictionary.cs
- DataGridCaption.cs
- JsonQNameDataContract.cs
- IdentityHolder.cs
- TextElementEnumerator.cs
- ClientTargetCollection.cs
- CardSpacePolicyElement.cs
- PerformanceCounter.cs
- TypeUnloadedException.cs
- Msec.cs
- ToolStripContentPanel.cs
- UrlMappingCollection.cs
- SvcMapFileLoader.cs
- GZipDecoder.cs
- LogReservationCollection.cs
- MarkupCompiler.cs
- AlternateView.cs
- OutputCacheSettings.cs
- NameSpaceExtractor.cs
- AppDomainManager.cs
- AbandonedMutexException.cs
- TypeReference.cs
- WebPartConnectVerb.cs
- TableCell.cs
- ManifestResourceInfo.cs
- TreeView.cs
- Rijndael.cs
- NullReferenceException.cs
- TextServicesProperty.cs
- TreeIterators.cs
- SimpleWebHandlerParser.cs
- UnsafeNativeMethods.cs
- WebPartTransformerAttribute.cs
- UTF32Encoding.cs
- MouseDevice.cs
- HandlerBase.cs
- Comparer.cs
- LinearGradientBrush.cs
- UnauthorizedWebPart.cs
- PointConverter.cs
- ProcessModule.cs
- RegexRunner.cs
- TypeHelpers.cs
- XmlReaderSettings.cs
- ISFClipboardData.cs
- UnicastIPAddressInformationCollection.cs
- AddInAttribute.cs
- WorkflowShape.cs
- SafeNativeMethods.cs
- XmlSchemaImporter.cs
- GridItemCollection.cs
- TableItemPattern.cs
- DataGridrowEditEndingEventArgs.cs
- _DomainName.cs
- MenuBindingsEditorForm.cs
- StringConverter.cs
- ElementFactory.cs
- BinHexEncoder.cs
- SelectedGridItemChangedEvent.cs
- ExceptQueryOperator.cs
- ClosableStream.cs
- SqlProvider.cs
- FixedSOMFixedBlock.cs
- SqlFileStream.cs
- DataGridRowEventArgs.cs
- FileDetails.cs
- DataRecordInternal.cs
- TypeLoadException.cs
- DataErrorValidationRule.cs
- MetaModel.cs
- OdbcCommand.cs
- GeneratedCodeAttribute.cs
- SqlInternalConnectionSmi.cs
- ScriptingJsonSerializationSection.cs
- RichTextBoxContextMenu.cs
- RawKeyboardInputReport.cs