ReaderColumn.Create 方法

参考

定义

命名空间:: Microsoft.EntityFrameworkCore.Storage

程序集:: Microsoft.EntityFrameworkCore.Relational.dll

包:: Microsoft.EntityFrameworkCore.Relational v3.1.0

包:: Microsoft.EntityFrameworkCore.Relational v5.0.0

包:: Microsoft.EntityFrameworkCore.Relational v6.0.0

包:: Microsoft.EntityFrameworkCore.Relational v7.0.0

包:: Microsoft.EntityFrameworkCore.Relational v8.0.0

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

重载

Create(Type, Boolean, String, Object)	已过时. 创建 ReaderColumn<T> 的实例。
Create(Type, Boolean, String, IPropertyBase, Object)	创建 ReaderColumn<T> 的实例。

Create(Type, Boolean, String, Object)

注意

Use method which also takes IPropertyBase.

创建 ReaderColumn<T> 的实例。

public static Microsoft.EntityFrameworkCore.Storage.ReaderColumn Create (Type type, bool nullable, string columnName, object readFunc);

[System.Obsolete("Use method which also takes IPropertyBase.")]
public static Microsoft.EntityFrameworkCore.Storage.ReaderColumn Create (Type type, bool nullable, string columnName, object readFunc);

[System.Obsolete("Use method which also takes IPropertyBase.")]
public static Microsoft.EntityFrameworkCore.Storage.ReaderColumn Create (Type type, bool nullable, string? columnName, object readFunc);

static member Create : Type * bool * string * obj -> Microsoft.EntityFrameworkCore.Storage.ReaderColumn

[<System.Obsolete("Use method which also takes IPropertyBase.")>]
static member Create : Type * bool * string * obj -> Microsoft.EntityFrameworkCore.Storage.ReaderColumn

Public Shared Function Create (type As Type, nullable As Boolean, columnName As String, readFunc As Object) As ReaderColumn

参数

type: Type

列的类型。

nullable: Boolean

列是否可以包含 null 值。

columnName: String

如果用于访问列值，则为列名称， null 否则为。

readFunc: Object

用于 System.Func{DbDataReader, Int32[], T} 获取此列的字段值的。

ReaderColumn

ReaderColumn<T> 的一个实例。

属性: ObsoleteAttribute

适用于

Create(Type, Boolean, String, IPropertyBase, Object)