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DbNullExpression Class

Represents a reference to a typed null literal. This class cannot be inherited.

System.Object
  System.Data.Common.CommandTrees.DbExpression
    System.Data.Common.CommandTrees.DbNullExpression

Namespace:  System.Data.Common.CommandTrees
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public sealed class DbNullExpression : DbExpression

The DbNullExpression type exposes the following members.

  NameDescription
Public propertyExpressionKindGets the kind of the expression, which indicates the operation of this expression. (Inherited from DbExpression.)
Public propertyResultTypeGets the type metadata for the result type of the expression. (Inherited from DbExpression.)
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  NameDescription
Public methodAccept(DbExpressionVisitor)Implements the visitor pattern for expressions that do not produce a result value. (Overrides DbExpression.Accept(DbExpressionVisitor).)
Public methodAccept<TResultType>(DbExpressionVisitor<TResultType>)Implements the visitor pattern for expressions that produce a result value of a specific type. (Inherited from DbExpression.)
Public methodAccept<TResultType>(DbExpressionVisitor<TResultType>)Implements the visitor pattern for expressions that produce a result value of a specific type. (Overrides DbExpression.Accept<TResultType>(DbExpressionVisitor<TResultType>).)
Public methodEqualsDetermines whether the specified Object is equal to the current DbExpression instance. (Inherited from DbExpression.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for the type. (Inherited from DbExpression.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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.NET Framework

Supported in: 4, 3.5 SP1

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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