DbExpressionBuilder.OuterApply Method

Definition

Namespace:

System.Data.Common.CommandTrees.ExpressionBuilder

Assembly:

System.Data.Entity.dll

Creates a new DbApplyExpression that evaluates the given apply expression once for each element of a given input set, producing a collection of rows with corresponding input and apply columns.

Overloads

OuterApply(DbExpression, Func<DbExpression,KeyValuePair<String,DbExpression>>)	Creates a new DbApplyExpression that evaluates the given apply expression once for each element of a given input set, producing a collection of rows with corresponding input and apply columns. Rows for which apply evaluates to an empty set have an apply column value of null.
OuterApply(DbExpressionBinding, DbExpressionBinding)	Creates a new DbApplyExpression that evaluates the given apply expression once for each element of a given input set, producing a collection of rows with corresponding input and apply columns. Rows for which apply evaluates to an empty set have an apply column value of null.

OuterApply(DbExpression, Func<DbExpression,KeyValuePair<String,DbExpression>>)

Creates a new DbApplyExpression that evaluates the given apply expression once for each element of a given input set, producing a collection of rows with corresponding input and apply columns. Rows for which apply evaluates to an empty set have an apply column value of null.

C#

public static System.Data.Common.CommandTrees.DbApplyExpression OuterApply(this System.Data.Common.CommandTrees.DbExpression source, Func<System.Data.Common.CommandTrees.DbExpression,System.Collections.Generic.KeyValuePair<string,System.Data.Common.CommandTrees.DbExpression>> apply);

Parameters

source

DbExpression

A DbExpression that specifies the input set.

apply

Func<DbExpression,KeyValuePair<String,DbExpression>>

A method that specifies the logic to evaluate once for each member of the input set.

Returns

DbApplyExpression

An new DbApplyExpression with the specified input and apply bindings and an DbExpressionKind of OuterApply.

Exceptions

ArgumentNullException

source or apply is null.

-or-

The result of apply contains a name or expression that is null.

ArgumentException

source does not have a collection result type.

-or-

The result of apply contains a name or expression that is not valid in an expression binding.

OuterApply(DbExpressionBinding, DbExpressionBinding)

Creates a new DbApplyExpression that evaluates the given apply expression once for each element of a given input set, producing a collection of rows with corresponding input and apply columns. Rows for which apply evaluates to an empty set have an apply column value of null.

C#

public static System.Data.Common.CommandTrees.DbApplyExpression OuterApply(this System.Data.Common.CommandTrees.DbExpressionBinding input, System.Data.Common.CommandTrees.DbExpressionBinding apply);

Parameters

input

DbExpressionBinding

An DbExpressionBinding that specifies the input set.

apply

DbExpressionBinding

An DbExpressionBinding that specifies logic to evaluate once for each member of the input set.

Returns

DbApplyExpression

An new DbApplyExpression with the specified input and apply bindings and an DbExpressionKind of OuterApply.

Exceptions

ArgumentNullException

input or apply is null.