EntityProjectionExpression 建構函式

參考

定義

命名空間:: Microsoft.EntityFrameworkCore.Query

組件:: Microsoft.EntityFrameworkCore.Relational.dll

套件:: Microsoft.EntityFrameworkCore.Relational v3.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v3.1.0

套件:: Microsoft.EntityFrameworkCore.Relational v5.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v6.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v7.0.0

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

多載

EntityProjectionExpression(IEntityType, IDictionary<IProperty,ColumnExpression>)
EntityProjectionExpression(IEntityType, TableExpressionBase, Boolean)	已淘汰. 建立 EntityProjectionExpression 類別的新執行個體。
EntityProjectionExpression(IEntityType, IDictionary<IProperty,ColumnExpression>, SqlExpression)	建立 EntityProjectionExpression 類別的新執行個體。
EntityProjectionExpression(IEntityType, IReadOnlyDictionary<IProperty,ColumnExpression>, SqlExpression)	建立 EntityProjectionExpression 類別的新執行個體。

EntityProjectionExpression(IEntityType, IDictionary<IProperty,ColumnExpression>)

來源:: EntityProjectionExpression.cs

來源:: EntityProjectionExpression.cs

public EntityProjectionExpression (Microsoft.EntityFrameworkCore.Metadata.IEntityType entityType, System.Collections.Generic.IDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty,Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression> propertyExpressions);

new Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression : Microsoft.EntityFrameworkCore.Metadata.IEntityType * System.Collections.Generic.IDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty, Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression> -> Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression

Public Sub New (entityType As IEntityType, propertyExpressions As IDictionary(Of IProperty, ColumnExpression))

參數

entityType: IEntityType

propertyExpressions: IDictionary<IProperty,ColumnExpression>

適用於

EntityProjectionExpression(IEntityType, TableExpressionBase, Boolean)

來源:: EntityProjectionExpression.cs

來源:: EntityProjectionExpression.cs

來源:: EntityProjectionExpression.cs

來源:: EntityProjectionExpression.cs

警告

Use the constructor which takes populated column expressions map.

建立 EntityProjectionExpression 類別的新執行個體。

public EntityProjectionExpression (Microsoft.EntityFrameworkCore.Metadata.IEntityType entityType, Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase innerTable, bool nullable);

[System.Obsolete("Use the constructor which takes populated column expressions map.", true)]
public EntityProjectionExpression (Microsoft.EntityFrameworkCore.Metadata.IEntityType entityType, Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase innerTable, bool nullable);

new Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression : Microsoft.EntityFrameworkCore.Metadata.IEntityType * Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase * bool -> Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression

[<System.Obsolete("Use the constructor which takes populated column expressions map.", true)>]
new Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression : Microsoft.EntityFrameworkCore.Metadata.IEntityType * Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase * bool -> Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression

Public Sub New (entityType As IEntityType, innerTable As TableExpressionBase, nullable As Boolean)

參數

entityType: IEntityType

要成形的實體類型。

innerTable: TableExpressionBase

要從中投射實體資料行的資料表。

nullable: Boolean

布林值，指出此實體實例是否可為 Null。

屬性: ObsoleteAttribute

適用於

EntityProjectionExpression(IEntityType, IDictionary<IProperty,ColumnExpression>, SqlExpression)

來源:: EntityProjectionExpression.cs

建立 EntityProjectionExpression 類別的新執行個體。

public EntityProjectionExpression (Microsoft.EntityFrameworkCore.Metadata.IEntityType entityType, System.Collections.Generic.IDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty,Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression> propertyExpressionMap, Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression discriminatorExpression = default);

new Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression : Microsoft.EntityFrameworkCore.Metadata.IEntityType * System.Collections.Generic.IDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty, Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression> * Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression -> Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression

Public Sub New (entityType As IEntityType, propertyExpressionMap As IDictionary(Of IProperty, ColumnExpression), Optional discriminatorExpression As SqlExpression = Nothing)

參數

entityType: IEntityType

要成形的實體類型。

propertyExpressionMap: IDictionary<IProperty,ColumnExpression>

對應至實體類型屬性之資料行運算式的字典。

discriminatorExpression: SqlExpression

SqlExpression，可針對階層中的每個具象實體類型產生鑒別子。

適用於

EntityProjectionExpression(IEntityType, IReadOnlyDictionary<IProperty,ColumnExpression>, SqlExpression)

來源:: EntityProjectionExpression.cs

來源:: EntityProjectionExpression.cs

建立 EntityProjectionExpression 類別的新執行個體。

public EntityProjectionExpression (Microsoft.EntityFrameworkCore.Metadata.IEntityType entityType, System.Collections.Generic.IReadOnlyDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty,Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression> propertyExpressionMap, Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression? discriminatorExpression = default);

new Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression : Microsoft.EntityFrameworkCore.Metadata.IEntityType * System.Collections.Generic.IReadOnlyDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty, Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression> * Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression -> Microsoft.EntityFrameworkCore.Query.EntityProjectionExpression

Public Sub New (entityType As IEntityType, propertyExpressionMap As IReadOnlyDictionary(Of IProperty, ColumnExpression), Optional discriminatorExpression As SqlExpression = Nothing)

參數

entityType: IEntityType

要成形的實體類型。

propertyExpressionMap: IReadOnlyDictionary<IProperty,ColumnExpression>

對應至實體類型屬性之資料行運算式的字典。

discriminatorExpression: SqlExpression

SqlExpression，可針對階層中的每個具象實體類型產生鑒別子。

適用於

共用方式為

EntityProjectionExpression 建構函式

定義

多載

EntityProjectionExpression(IEntityType, IDictionary<IProperty,ColumnExpression>)

參數

適用於

EntityProjectionExpression(IEntityType, TableExpressionBase, Boolean)

參數

適用於

EntityProjectionExpression(IEntityType, IDictionary<IProperty,ColumnExpression>, SqlExpression)

參數

適用於

EntityProjectionExpression(IEntityType, IReadOnlyDictionary<IProperty,ColumnExpression>, SqlExpression)

參數

適用於

其他資源