SelectExpression.CreateColumnExpression Metodo

Definizione

Spazio dei nomi:

Microsoft.EntityFrameworkCore.Query.SqlExpressions

Assembly:

Microsoft.EntityFrameworkCore.Relational.dll

Pacchetto:

Microsoft.EntityFrameworkCore.Relational v8.0.0

Crea un oggetto ColumnExpression che fa riferimento a una tabella in questo SelectExpressionoggetto .

public Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression CreateColumnExpression (Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase tableExpression, string columnName, Type type, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping, bool? columnNullable = default);

member this.CreateColumnExpression : Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping * Nullable<bool> -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression

Public Function CreateColumnExpression (tableExpression As TableExpressionBase, columnName As String, type As Type, typeMapping As RelationalTypeMapping, Optional columnNullable As Nullable(Of Boolean) = Nothing) As ColumnExpression

Parametri

tableExpression

TableExpressionBase

Espressione di tabella a cui fa riferimento la colonna .

columnName

String

Nome della colonna.

type

Type

Tipo CLR della colonna.

typeMapping

RelationalTypeMapping

Mapping dei tipi della colonna.

columnNullable

Nullable<Boolean>

Indica se la colonna è nullable.

Restituisce

ColumnExpression