DbExpressionBuilder.ThenByDescending Method

Reference

Definition

Namespace:: System.Data.Common.CommandTrees.ExpressionBuilder

Assembly:: System.Data.Entity.dll

Important

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Creates a new DbSortExpression that with a sort order that includes the sort order of the given order input set together with the specified sort key in descending sort order and with default collation.

Overloads

ThenByDescending(DbSortExpression, Func<DbExpression,DbExpression>)	Creates a new DbSortExpression that with a sort order that includes the sort order of the given order input set together with the specified sort key in descending sort order and with default collation.
ThenByDescending(DbSortExpression, Func<DbExpression,DbExpression>, String)	Creates a new DbSortExpression that with a sort order that includes the sort order of the given order input set together with the specified sort key in descending sort order and with the specified collation.

ThenByDescending(DbSortExpression, Func<DbExpression,DbExpression>)

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbSortExpression ^ ThenByDescending(System::Data::Common::CommandTrees::DbSortExpression ^ source, Func<System::Data::Common::CommandTrees::DbExpression ^, System::Data::Common::CommandTrees::DbExpression ^> ^ sortKey);

public static System.Data.Common.CommandTrees.DbSortExpression ThenByDescending (this System.Data.Common.CommandTrees.DbSortExpression source, Func<System.Data.Common.CommandTrees.DbExpression,System.Data.Common.CommandTrees.DbExpression> sortKey);

static member ThenByDescending : System.Data.Common.CommandTrees.DbSortExpression * Func<System.Data.Common.CommandTrees.DbExpression, System.Data.Common.CommandTrees.DbExpression> -> System.Data.Common.CommandTrees.DbSortExpression

<Extension()>
Public Function ThenByDescending (source As DbSortExpression, sortKey As Func(Of DbExpression, DbExpression)) As DbSortExpression

Parameters

source: DbSortExpression

A DbSortExpression that specifies the ordered input set.

sortKey: Func<DbExpression,DbExpression>

A method that specifies how to derive the additional sort key expression given a member of the input set. This method must produce an expression with an order-comparable result type that provides the sort key definition.

Returns

DbSortExpression

A new DbSortExpression that represents the new overall order-by operation.

Exceptions

ArgumentNullException

source or sortKey is null.

-or-

The expression produced by sortKey is null.

ArgumentException

source does not have a collection result type.

-or-

The expression produced by sortKey does not have an order-comparable result type.

Applies to

ThenByDescending(DbSortExpression, Func<DbExpression,DbExpression>, String)

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbSortExpression ^ ThenByDescending(System::Data::Common::CommandTrees::DbSortExpression ^ source, Func<System::Data::Common::CommandTrees::DbExpression ^, System::Data::Common::CommandTrees::DbExpression ^> ^ sortKey, System::String ^ collation);

public static System.Data.Common.CommandTrees.DbSortExpression ThenByDescending (this System.Data.Common.CommandTrees.DbSortExpression source, Func<System.Data.Common.CommandTrees.DbExpression,System.Data.Common.CommandTrees.DbExpression> sortKey, string collation);

static member ThenByDescending : System.Data.Common.CommandTrees.DbSortExpression * Func<System.Data.Common.CommandTrees.DbExpression, System.Data.Common.CommandTrees.DbExpression> * string -> System.Data.Common.CommandTrees.DbSortExpression

<Extension()>
Public Function ThenByDescending (source As DbSortExpression, sortKey As Func(Of DbExpression, DbExpression), collation As String) As DbSortExpression