DbExpressionBuilder.OrderByDescending Method
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Creates a new DbSortExpression that sorts the given input set by the specified sort key, with descending sort order and default collation.
| OrderByDescending(DbExpression, Func<DbExpression,DbExpression>) |
Creates a new DbSortExpression that sorts the given input set by the specified sort key, with descending sort order and default collation. |
| OrderByDescending(DbExpression, Func<DbExpression,DbExpression>, String) |
Creates a new DbSortExpression that sorts the given input set by the specified sort key, with descending sort order and the specified collation. |
Creates a new DbSortExpression that sorts the given input set by the specified sort key, with descending sort order and default collation.
public:
[System::Runtime::CompilerServices::Extension]
static System::Data::Common::CommandTrees::DbSortExpression ^ OrderByDescending(System::Data::Common::CommandTrees::DbExpression ^ source, Func<System::Data::Common::CommandTrees::DbExpression ^, System::Data::Common::CommandTrees::DbExpression ^> ^ sortKey);public static System.Data.Common.CommandTrees.DbSortExpression OrderByDescending(this System.Data.Common.CommandTrees.DbExpression source, Func<System.Data.Common.CommandTrees.DbExpression,System.Data.Common.CommandTrees.DbExpression> sortKey);static member OrderByDescending : System.Data.Common.CommandTrees.DbExpression * Func<System.Data.Common.CommandTrees.DbExpression, System.Data.Common.CommandTrees.DbExpression> -> System.Data.Common.CommandTrees.DbSortExpression<Extension()>
Public Function OrderByDescending (source As DbExpression, sortKey As Func(Of DbExpression, DbExpression)) As DbSortExpressionParameters
- source
- DbExpression
An expression that specifies the input set.
- sortKey
- Func<DbExpression,DbExpression>
A method that specifies how to derive the 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
A new DbSortExpression that represents the order-by operation.
Exceptions
source does not have a collection result type.
-or-
The expression produced by sortKey does not have an order-comparable result type.
Applies to
.NET Framework 4.8.1 и други версии
| Продукт | Версии |
|---|---|
| .NET Framework | 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Creates a new DbSortExpression that sorts the given input set by the specified sort key, with descending sort order and the specified collation.
public:
[System::Runtime::CompilerServices::Extension]
static System::Data::Common::CommandTrees::DbSortExpression ^ OrderByDescending(System::Data::Common::CommandTrees::DbExpression ^ source, Func<System::Data::Common::CommandTrees::DbExpression ^, System::Data::Common::CommandTrees::DbExpression ^> ^ sortKey, System::String ^ collation);public static System.Data.Common.CommandTrees.DbSortExpression OrderByDescending(this System.Data.Common.CommandTrees.DbExpression source, Func<System.Data.Common.CommandTrees.DbExpression,System.Data.Common.CommandTrees.DbExpression> sortKey, string collation);static member OrderByDescending : System.Data.Common.CommandTrees.DbExpression * Func<System.Data.Common.CommandTrees.DbExpression, System.Data.Common.CommandTrees.DbExpression> * string -> System.Data.Common.CommandTrees.DbSortExpression<Extension()>
Public Function OrderByDescending (source As DbExpression, sortKey As Func(Of DbExpression, DbExpression), collation As String) As DbSortExpressionParameters
- source
- DbExpression
An expression that specifies the input set.
- sortKey
- Func<DbExpression,DbExpression>
A method that specifies how to derive the 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.
- collation
- String
The collation to sort under.
Returns
A new DbSortExpression that represents the order-by operation.
Exceptions
source, sortKey or collation is null.
-or-
The expression produced by sortKey is null.
source does not have a collection result type.
-or-
The expression produced by sortKey does not have an order-comparable string result type.
collation is empty or contains only space characters.
Applies to
.NET Framework 4.8.1 и други версии
| Продукт | Версии |
|---|---|
| .NET Framework | 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
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