Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / 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
- WorkflowViewStateService.cs
- MutableAssemblyCacheEntry.cs
- DataObjectFieldAttribute.cs
- SHA384Cng.cs
- ProtocolsConfiguration.cs
- ResponseBodyWriter.cs
- RectAnimationClockResource.cs
- GenericIdentity.cs
- ResourceManagerWrapper.cs
- ExpressionNode.cs
- ParameterReplacerVisitor.cs
- LayoutInformation.cs
- NameValueCollection.cs
- PersistNameAttribute.cs
- PreviousTrackingServiceAttribute.cs
- AppAction.cs
- TabControlEvent.cs
- DecoderReplacementFallback.cs
- AspCompat.cs
- CookieParameter.cs
- StorageScalarPropertyMapping.cs
- SByte.cs
- SystemDiagnosticsSection.cs
- SqlDataSourceCommandEventArgs.cs
- DataGrid.cs
- ContractBase.cs
- StructuredType.cs
- ProviderMetadata.cs
- MemoryMappedViewAccessor.cs
- HWStack.cs
- ManifestResourceInfo.cs
- InteropAutomationProvider.cs
- DriveNotFoundException.cs
- XPathScanner.cs
- WeakHashtable.cs
- WCFBuildProvider.cs
- IsolatedStorageException.cs
- MetadataPropertyvalue.cs
- PopupControlService.cs
- PropertyOverridesTypeEditor.cs
- Literal.cs
- BamlRecordReader.cs
- DecimalSumAggregationOperator.cs
- DataGridViewComponentPropertyGridSite.cs
- TimeSpanParse.cs
- ListChangedEventArgs.cs
- WmfPlaceableFileHeader.cs
- IntSecurity.cs
- CounterCreationDataCollection.cs
- ConfigurationValue.cs
- TableParaClient.cs
- CompiledXpathExpr.cs
- Int16.cs
- DEREncoding.cs
- VisualStyleInformation.cs
- DataGridClipboardCellContent.cs
- WindowsUpDown.cs
- ErrorsHelper.cs
- GridViewCancelEditEventArgs.cs
- BrowserTree.cs
- XmlSchemaImporter.cs
- WorkflowServiceBehavior.cs
- CopyCodeAction.cs
- DelayedRegex.cs
- WinInet.cs
- _ConnectStream.cs
- ActivityExecutionFilter.cs
- InputScope.cs
- SubpageParaClient.cs
- EncryptedPackageFilter.cs
- SqlReorderer.cs
- InputScopeNameConverter.cs
- ReferencedAssembly.cs
- DataObjectEventArgs.cs
- UserValidatedEventArgs.cs
- InputLanguageProfileNotifySink.cs
- OracleDataReader.cs
- HtmlLiteralTextAdapter.cs
- RSAOAEPKeyExchangeDeformatter.cs
- OrderPreservingMergeHelper.cs
- PointLight.cs
- PropertyGroupDescription.cs
- SimpleWebHandlerParser.cs
- TypeConverterHelper.cs
- InvalidOleVariantTypeException.cs
- HttpCacheVary.cs
- FontStretch.cs
- DependencyPropertyKey.cs
- ToolboxDataAttribute.cs
- DocumentAutomationPeer.cs
- AssemblyFilter.cs
- ContentValidator.cs
- entitydatasourceentitysetnameconverter.cs
- XmlTypeMapping.cs
- SystemInformation.cs
- DataContractSerializerElement.cs
- PublisherMembershipCondition.cs
- ExpandCollapseProviderWrapper.cs
- Variable.cs
- StackOverflowException.cs