DbExpression Class
Implements the basic functionality required by expression types.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
An expression is the fundamental building block of queries represented by a command tree. An expression represents some computation. Examples of expressions include constants, variables, functions, constructors, and standard relational operators like filter, join, and so on.
Every expression has a data type that designates the type of the result produced by that expression. The data type of the expression cannot be changed after creation.
An expression belongs to exactly one DbCommandTree. All sub-expressions of an expression must belong to the same DbCommandTree.
Expression trees are partially mutable: expression sub-trees can be replaced as long as the replacements have the same data type. The phrase expression sub-tree refers to the linkages between expressions.
System.Data.Common.CommandTrees.DbExpression
System.Data.Common.CommandTrees.DbApplyExpression
System.Data.Common.CommandTrees.DbArithmeticExpression
System.Data.Common.CommandTrees.DbBinaryExpression
System.Data.Common.CommandTrees.DbCaseExpression
System.Data.Common.CommandTrees.DbConstantExpression
System.Data.Common.CommandTrees.DbCrossJoinExpression
System.Data.Common.CommandTrees.DbFilterExpression
System.Data.Common.CommandTrees.DbFunctionExpression
System.Data.Common.CommandTrees.DbGroupByExpression
System.Data.Common.CommandTrees.DbJoinExpression
System.Data.Common.CommandTrees.DbLikeExpression
System.Data.Common.CommandTrees.DbLimitExpression
System.Data.Common.CommandTrees.DbNewInstanceExpression
System.Data.Common.CommandTrees.DbNullExpression
System.Data.Common.CommandTrees.DbParameterReferenceExpression
System.Data.Common.CommandTrees.DbProjectExpression
System.Data.Common.CommandTrees.DbPropertyExpression
System.Data.Common.CommandTrees.DbQuantifierExpression
System.Data.Common.CommandTrees.DbRelationshipNavigationExpression
System.Data.Common.CommandTrees.DbScanExpression
System.Data.Common.CommandTrees.DbSkipExpression
System.Data.Common.CommandTrees.DbSortExpression
System.Data.Common.CommandTrees.DbUnaryExpression
System.Data.Common.CommandTrees.DbVariableReferenceExpression
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.