ProjectionBindingExpression 构造函数
定义
重要
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重载
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.ProjectionBindingExpressionPublic 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.ProjectionBindingExpressionPublic 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
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.ProjectionBindingExpressionPublic 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.ProjectionBindingExpressionPublic 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。
