Export (0) Print
Expand All

CompiledQuery Class

Represents a cached LINQ to Entities query.

System.Object
  System.Data.Objects.CompiledQuery

Namespace:  System.Data.Objects
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

'Declaration
Public NotInheritable Class CompiledQuery

The CompiledQuery type exposes the following members.

  NameDescription
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TArg13, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TArg13, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TArg13, TArg14, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TArg13, TArg14, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TArg13, TArg14, TArg15, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TArg8, TArg9, TArg10, TArg11, TArg12, TArg13, TArg14, TArg15, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TResult)(Expression(Of Func(Of TArg0, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TResult)(Expression(Of Func(Of TArg0, TArg1, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodStatic memberCompile(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TResult)(Expression(Of Func(Of TArg0, TArg1, TArg2, TArg3, TArg4, TArg5, TArg6, TArg7, TResult)))Creates a new delegate that represents the compiled LINQ to Entities query.
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Top

Provides for compilation and caching of queries for reuse. Conceptually this class contains a single Compile method with several overloads. You call the Compile method to create a new delegate to represent the compiled query. The delegate, when invoked with the ObjectContext input parameter and other parameter values, produces some result (such as an IQueryable(Of T) instance). The query is translated and cached when the delegate is invoked for the first time.

The following example compiles and then invokes a query that accepts DateTime and Decimal input parameters and returns a sequence of orders where the order date is later than March 8, 2003 and the total due is less than $300.00:

ReadOnly s_compQuery5 = _
   CompiledQuery.Compile(Of AdventureWorksEntities, DateTime, Decimal, IQueryable(Of SalesOrderHeader))( _
                Function(ctx, orderDate, totalDue) From product In ctx.SalesOrderHeaders _
                                                   Where product.OrderDate > orderDate _
                                                      And product.TotalDue < totalDue _
                                                   Order By product.OrderDate _
                                                   Select product)
Sub CompiledQuery5()

    Using context As New AdventureWorksEntities()

        Dim orderedAfterDate As DateTime = New DateTime(2003, 3, 8)
        Dim amountDue As Decimal = 300.0

        Dim orders As IQueryable(Of SalesOrderHeader) = _
            s_compQuery5.Invoke(context, orderedAfterDate, amountDue)

        For Each order In orders
            Console.WriteLine("ID: {0} Order date: {1} Total due: {2}", _
                              order.SalesOrderID, order.OrderDate, order.TotalDue)
        Next 

    End Using 
End Sub

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5 SP1

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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.
Show:
© 2014 Microsoft