通过

ProjectionBindingExpression 构造函数

  • 参考

定义

命名空间:
Microsoft.EntityFrameworkCore.Query
程序集:
Microsoft.EntityFrameworkCore.dll
包:
Microsoft.EntityFrameworkCore v3.0.0
包:
Microsoft.EntityFrameworkCore v3.1.0
包:
Microsoft.EntityFrameworkCore v5.0.0
包:
Microsoft.EntityFrameworkCore v6.0.0
包:
Microsoft.EntityFrameworkCore v7.0.0
包:
Microsoft.EntityFrameworkCore v8.0.0

重载

ProjectionBindingExpression(Expression, IDictionary<IProperty,Int32>)

创建 ProjectionBindingExpression 类的新实例。
ProjectionBindingExpression(Expression, IReadOnlyDictionary<IProperty,Int32>)
已过时.

创建 ProjectionBindingExpression 类的新实例。
ProjectionBindingExpression(Expression, ProjectionMember, Type)

创建 ProjectionBindingExpression 类的新实例。
ProjectionBindingExpression(Expression, Int32, Type)

创建 ProjectionBindingExpression 类的新实例。

ProjectionBindingExpression(Expression, IDictionary<IProperty,Int32>)

创建 ProjectionBindingExpression 类的新实例。

public ProjectionBindingExpression (System.Linq.Expressions.Expression queryExpression, System.Collections.Generic.IDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty,int> indexMap);
new Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression : System.Linq.Expressions.Expression * System.Collections.Generic.IDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty, int> -> Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression
Public Sub New (queryExpression As Expression, indexMap As IDictionary(Of IProperty, Integer))

参数

queryExpression
Expression

要从中获取值的查询表达式。

indexMap
IDictionary<IProperty,Int32>

要与 ValueBuffer 的查询表达式投影绑定的索引映射。

适用于

ProjectionBindingExpression(Expression, IReadOnlyDictionary<IProperty,Int32>)

注意

The dictionary should be stored in client projection in query expression and access via index based binding.

创建 ProjectionBindingExpression 类的新实例。

[System.Obsolete("The dictionary should be stored in client projection in query expression and access via index based binding.")]
public ProjectionBindingExpression (System.Linq.Expressions.Expression queryExpression, System.Collections.Generic.IReadOnlyDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty,int> indexMap);
[<System.Obsolete("The dictionary should be stored in client projection in query expression and access via index based binding.")>]
new Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression : System.Linq.Expressions.Expression * System.Collections.Generic.IReadOnlyDictionary<Microsoft.EntityFrameworkCore.Metadata.IProperty, int> -> Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression
Public Sub New (queryExpression As Expression, indexMap As IReadOnlyDictionary(Of IProperty, Integer))

参数

queryExpression
Expression

要从中获取值的查询表达式。

indexMap
IReadOnlyDictionary<IProperty,Int32>

要与 ValueBuffer 的查询表达式投影绑定的索引映射。

属性
ObsoleteAttribute

适用于

ProjectionBindingExpression(Expression, ProjectionMember, Type)

创建 ProjectionBindingExpression 类的新实例。

public ProjectionBindingExpression (System.Linq.Expressions.Expression queryExpression, Microsoft.EntityFrameworkCore.Query.ProjectionMember projectionMember, Type type);
new Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression : System.Linq.Expressions.Expression * Microsoft.EntityFrameworkCore.Query.ProjectionMember * Type -> Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression
Public Sub New (queryExpression As Expression, projectionMember As ProjectionMember, type As Type)

参数

queryExpression
Expression

要从中获取值的查询表达式。

projectionMember
ProjectionMember

要与查询表达式绑定的投影成员。

type
Type

正在读取的值的 clr 类型。

适用于

ProjectionBindingExpression(Expression, Int32, Type)

创建 ProjectionBindingExpression 类的新实例。

public ProjectionBindingExpression (System.Linq.Expressions.Expression queryExpression, int index, Type type);
new Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression : System.Linq.Expressions.Expression * int * Type -> Microsoft.EntityFrameworkCore.Query.ProjectionBindingExpression
Public Sub New (queryExpression As Expression, index As Integer, type As Type)

参数

queryExpression
Expression

要从中获取值的查询表达式。

index
Int32

要与查询表达式投影绑定的索引。

type
Type

正在读取的值的 clr 类型。

适用于