Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / clr / src / BCL / System / DBNull.cs / 1 / DBNull.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //////////////////////////////////////////////////////////////////////////////// // Void // This class represents a Missing Variant //////////////////////////////////////////////////////////////////////////////// namespace System { using System; using System.Runtime.Remoting; using System.Runtime.Serialization; [System.Runtime.InteropServices.ComVisible(true)] [Serializable()] public sealed class DBNull : ISerializable, IConvertible { //Package private constructor private DBNull(){ } private DBNull(SerializationInfo info, StreamingContext context) { throw new NotSupportedException(Environment.GetResourceString("NotSupported_DBNullSerial")); } public static readonly DBNull Value = new DBNull(); public void GetObjectData(SerializationInfo info, StreamingContext context) { UnitySerializationHolder.GetUnitySerializationInfo(info, UnitySerializationHolder.NullUnity, null, null); } public override String ToString() { return String.Empty; } public String ToString(IFormatProvider provider) { return String.Empty; } public TypeCode GetTypeCode() { return TypeCode.DBNull; } ///bool IConvertible.ToBoolean(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// char IConvertible.ToChar(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// sbyte IConvertible.ToSByte(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// byte IConvertible.ToByte(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// short IConvertible.ToInt16(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// ushort IConvertible.ToUInt16(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// int IConvertible.ToInt32(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// uint IConvertible.ToUInt32(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// long IConvertible.ToInt64(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// ulong IConvertible.ToUInt64(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// float IConvertible.ToSingle(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// double IConvertible.ToDouble(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// decimal IConvertible.ToDecimal(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// DateTime IConvertible.ToDateTime(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// Object IConvertible.ToType(Type type, IFormatProvider provider) { return Convert.DefaultToType((IConvertible)this, type, provider); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //////////////////////////////////////////////////////////////////////////////// // Void // This class represents a Missing Variant //////////////////////////////////////////////////////////////////////////////// namespace System { using System; using System.Runtime.Remoting; using System.Runtime.Serialization; [System.Runtime.InteropServices.ComVisible(true)] [Serializable()] public sealed class DBNull : ISerializable, IConvertible { //Package private constructor private DBNull(){ } private DBNull(SerializationInfo info, StreamingContext context) { throw new NotSupportedException(Environment.GetResourceString("NotSupported_DBNullSerial")); } public static readonly DBNull Value = new DBNull(); public void GetObjectData(SerializationInfo info, StreamingContext context) { UnitySerializationHolder.GetUnitySerializationInfo(info, UnitySerializationHolder.NullUnity, null, null); } public override String ToString() { return String.Empty; } public String ToString(IFormatProvider provider) { return String.Empty; } public TypeCode GetTypeCode() { return TypeCode.DBNull; } /// bool IConvertible.ToBoolean(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// char IConvertible.ToChar(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// sbyte IConvertible.ToSByte(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// byte IConvertible.ToByte(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// short IConvertible.ToInt16(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// ushort IConvertible.ToUInt16(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// int IConvertible.ToInt32(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// uint IConvertible.ToUInt32(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// long IConvertible.ToInt64(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// ulong IConvertible.ToUInt64(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// float IConvertible.ToSingle(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// double IConvertible.ToDouble(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// decimal IConvertible.ToDecimal(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// DateTime IConvertible.ToDateTime(IFormatProvider provider) { throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromDBNull")); } /// Object IConvertible.ToType(Type type, IFormatProvider provider) { return Convert.DefaultToType((IConvertible)this, type, provider); } } } // 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
- SystemWebSectionGroup.cs
- PreviewPrintController.cs
- XPathNodeIterator.cs
- MemberCollection.cs
- followingsibling.cs
- EditorBrowsableAttribute.cs
- EntityDataSourceContextCreatedEventArgs.cs
- XmlAnyElementAttributes.cs
- ImportCatalogPart.cs
- DataGrid.cs
- XmlSchemaSimpleTypeRestriction.cs
- BufferModesCollection.cs
- Keywords.cs
- ConnectionStringsExpressionEditor.cs
- CompilationSection.cs
- DSACryptoServiceProvider.cs
- DescendentsWalkerBase.cs
- DATA_BLOB.cs
- HttpConfigurationSystem.cs
- XamlPathDataSerializer.cs
- TextRangeEditLists.cs
- TextServicesCompartmentEventSink.cs
- HelpInfo.cs
- TdsParserStaticMethods.cs
- TagNameToTypeMapper.cs
- ComponentChangedEvent.cs
- XmlSerializerVersionAttribute.cs
- EndEvent.cs
- ActivitySurrogateSelector.cs
- BindingMemberInfo.cs
- DataSourceGeneratorException.cs
- TextContainerHelper.cs
- WebPartManager.cs
- DynamicDataRoute.cs
- TdsValueSetter.cs
- ADRoleFactoryConfiguration.cs
- HttpWebRequest.cs
- DelayedRegex.cs
- AutomationIdentifierGuids.cs
- EmptyEnumerable.cs
- CheckBox.cs
- TableRow.cs
- ValidationSummary.cs
- MD5CryptoServiceProvider.cs
- Dynamic.cs
- DataGridTextBox.cs
- Page.cs
- RelationshipNavigation.cs
- ListBox.cs
- DataGridTablesFactory.cs
- WindowsUpDown.cs
- FieldToken.cs
- BamlResourceDeserializer.cs
- DataGridViewImageColumn.cs
- WpfKnownTypeInvoker.cs
- ScrollContentPresenter.cs
- XmlReaderDelegator.cs
- DateTimeConverter.cs
- TextParagraphView.cs
- WorkflowApplication.cs
- HyperlinkAutomationPeer.cs
- CollectionContainer.cs
- StartUpEventArgs.cs
- CharAnimationBase.cs
- DBConnection.cs
- HttpApplicationStateBase.cs
- Bezier.cs
- CursorInteropHelper.cs
- TemplateXamlParser.cs
- SqlProviderManifest.cs
- PublishLicense.cs
- VisualBasicExpressionConverter.cs
- BamlLocalizerErrorNotifyEventArgs.cs
- HtmlPhoneCallAdapter.cs
- ConsoleKeyInfo.cs
- MdiWindowListStrip.cs
- AttributeCollection.cs
- BaseDataBoundControlDesigner.cs
- AuthenticationSection.cs
- ChameleonKey.cs
- Vector3DAnimationBase.cs
- PermissionRequestEvidence.cs
- ISessionStateStore.cs
- DataListItemEventArgs.cs
- MenuRendererStandards.cs
- PathFigureCollectionValueSerializer.cs
- NopReturnReader.cs
- _TransmitFileOverlappedAsyncResult.cs
- DES.cs
- AnimatedTypeHelpers.cs
- SamlAuthenticationStatement.cs
- SortDescriptionCollection.cs
- RichTextBoxConstants.cs
- MiniModule.cs
- MultiView.cs
- Metadata.cs
- RepeaterItem.cs
- Track.cs
- PolyBezierSegment.cs
- XsltCompileContext.cs