Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / ColumnTypeConverter.cs / 1305376 / ColumnTypeConverter.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; using System.Data.SqlTypes; ////// internal sealed class ColumnTypeConverter : TypeConverter { private static Type[] types = new Type[] { typeof(Boolean), typeof(Byte), typeof(Byte[]), typeof(Char), typeof(DateTime), typeof(Decimal), typeof(Double), typeof(Guid), typeof(Int16), typeof(Int32), typeof(Int64), typeof(object), typeof(SByte), typeof(Single), typeof(string), typeof(TimeSpan), typeof(UInt16), typeof(UInt32), typeof(UInt64), typeof(SqlInt16), typeof(SqlInt32), typeof(SqlInt64), typeof(SqlDecimal), typeof(SqlSingle), typeof(SqlDouble), typeof(SqlString), typeof(SqlBoolean), typeof(SqlBinary), typeof(SqlByte), typeof(SqlDateTime), typeof(SqlGuid), typeof(SqlMoney), typeof(SqlBytes), typeof(SqlChars), typeof(SqlXml) }; private StandardValuesCollection values; // converter classes should have public ctor public ColumnTypeConverter() { } ///Provides a type /// converter that can be used to populate a list box with available types. ////// 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. ////// 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 String.Empty; } else { value.ToString(); } } if (value != null && destinationType == typeof(InstanceDescriptor)) { Object newValue = value; if (value is string) { for (int i = 0; i < types.Length; i++) { if (types[i].ToString().Equals(value)) newValue = types[i]; } } if (value is Type || value is string) { System.Reflection.MethodInfo method = typeof(Type).GetMethod("GetType", new Type[] {typeof(string)}); // change done for security review if (method != null) { return new InstanceDescriptor(method, new object[] {((Type)newValue).AssemblyQualifiedName}); } } } return base.ConvertTo(context, culture, value, destinationType); } public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return base.CanConvertTo(context, sourceType); } public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value != null && value.GetType() == typeof(string)) { for (int i = 0; i < types.Length; i++) { if (types[i].ToString().Equals(value)) return types[i]; } return typeof(string); } return base.ConvertFrom(context, culture, value); } ///Converts the given value object to the specified destination type. ////// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (values == null) { object[] objTypes; if (types != null) { objTypes = new object[types.Length]; Array.Copy(types, objTypes, types.Length); } else { objTypes = null; } values = new StandardValuesCollection(objTypes); } return values; } ///Gets a collection of standard values for the data type this validator is /// designed for. ////// public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return true; } ///Gets a value indicating whether the list of standard values returned from /// ///is an exclusive list. /// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.Gets a value indicating whether this object supports a /// standard set of values that can be picked from a list using the specified /// context. ///
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SendMailErrorEventArgs.cs
- ClientApiGenerator.cs
- IsolatedStorageFile.cs
- TraceLog.cs
- ManagedWndProcTracker.cs
- RightNameExpirationInfoPair.cs
- NameValueFileSectionHandler.cs
- FreezableDefaultValueFactory.cs
- SocketStream.cs
- WebPartEventArgs.cs
- Membership.cs
- ApplicationServiceManager.cs
- SharedStatics.cs
- ThreadStateException.cs
- RemoteWebConfigurationHost.cs
- SeekStoryboard.cs
- PKCS1MaskGenerationMethod.cs
- GenericIdentity.cs
- ResolvedKeyFrameEntry.cs
- ResourcesGenerator.cs
- Certificate.cs
- BuildResult.cs
- SoapIgnoreAttribute.cs
- ObjectListFieldsPage.cs
- SignatureDescription.cs
- WebPartEventArgs.cs
- WindowsListBox.cs
- MappingSource.cs
- XmlTextReaderImpl.cs
- SingleTagSectionHandler.cs
- WindowsUpDown.cs
- DrawingVisual.cs
- WmpBitmapDecoder.cs
- IMembershipProvider.cs
- EntityContainer.cs
- XmlChildNodes.cs
- ActivityExecutor.cs
- PrincipalPermission.cs
- BrowserCapabilitiesCompiler.cs
- PageRequestManager.cs
- MailDefinition.cs
- Error.cs
- BinaryMethodMessage.cs
- TextBox.cs
- NativeCppClassAttribute.cs
- ImpersonationContext.cs
- ResXDataNode.cs
- TypeViewSchema.cs
- Renderer.cs
- EntityStoreSchemaGenerator.cs
- DbParameterHelper.cs
- SimpleModelProvider.cs
- XslTransform.cs
- Psha1DerivedKeyGeneratorHelper.cs
- XmlnsCompatibleWithAttribute.cs
- ProcessModuleCollection.cs
- ObjectStateEntryDbDataRecord.cs
- XsdBuildProvider.cs
- DataGridCommandEventArgs.cs
- ExpressionCopier.cs
- RequestCachePolicyConverter.cs
- EventLevel.cs
- LineVisual.cs
- StatusBarPanelClickEvent.cs
- TimeSpan.cs
- RightsManagementEncryptedStream.cs
- DataGridViewTextBoxEditingControl.cs
- LambdaExpression.cs
- SoapAttributes.cs
- StylusPointProperty.cs
- ISAPIApplicationHost.cs
- XamlToRtfParser.cs
- StringComparer.cs
- DayRenderEvent.cs
- RawStylusInputCustomDataList.cs
- Int32Rect.cs
- MessageDecoder.cs
- SiteMap.cs
- Content.cs
- DeviceSpecificChoiceCollection.cs
- WSHttpBinding.cs
- QueryCursorEventArgs.cs
- ScopedKnownTypes.cs
- MultipleViewProviderWrapper.cs
- CustomSignedXml.cs
- DocumentDesigner.cs
- TextTreeTextBlock.cs
- EdmComplexPropertyAttribute.cs
- CodeComment.cs
- _IPv6Address.cs
- Icon.cs
- UserNamePasswordValidator.cs
- Suspend.cs
- ConfigurationConverterBase.cs
- X509AsymmetricSecurityKey.cs
- StrokeCollectionDefaultValueFactory.cs
- DataGridTableCollection.cs
- ObjectStorage.cs
- DirectoryInfo.cs
- Lasso.cs