SelectExpression.CreateColumnExpression Yöntem

Tanım

Ad Alanı:

Microsoft.EntityFrameworkCore.Query.SqlExpressions

Bütünleştirilmiş Kod:

Microsoft.EntityFrameworkCore.Relational.dll

Paket:

Microsoft.EntityFrameworkCore.Relational v9.0.0

Kaynak:

SelectExpression.cs

Bu SelectExpressionüzerindeki bir tabloya başvuran bir ColumnExpression oluşturur.

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

Parametreler

tableExpression

TableExpressionBase

Sütun tarafından başvuruda bulunan tablo ifadesi.

columnName

String

Sütun adı.

type

Type

Sütun CLR türü.

typeMapping

RelationalTypeMapping

Sütunun tür eşlemesi.

columnNullable

Nullable<Boolean>

Sütunun null atanabilir olup olmadığı.

Döndürülenler

ColumnExpression