实体框架实体类与普通 .NET 类的映射

发布于 2024-10-15 17:53:09 字数 1032 浏览 1 评论 0原文

我在实体框架中有以下内容。

表 - 国家/地区

字段

列表项
Country_ID
Dialing_Code
ISO_Alpha2
ISO_Alpha3
ISO_Full

我想仅将此实体模型中的选定字段映射到我的域类。

我的域模型类是

public class DomainCountry
{
    public int Country_ID { get; set; }
    public string Dialing_Code { get; set; }
    public string ISO_3166_1_Alpha_2 { get; set; }
}

以下内容可以工作，但是不可能插入或更新。为了插入或更新，我们需要使用 ObjectSet，但在我的情况下它不支持。

IQueryable<DomainCountry> countries =
    context.Countries.Select(
        c =>
        new DomainCountry
            {
                Country_ID = c.Country_Id,
                Dialing_Code = c.Dialing_Code,
                ISO_3166_1_Alpha_2 = c.ISO_3166_1_Alpha_2
            });

对此有一个好的解决方案吗？这真是太棒了。

理想情况下，它将是一种代理类，它将支持所有未来，无论高度可定制。

也就是说，只有我们想要向外部世界公开的列。

原文

I have the following in Entity Framework.

Table - Country

Fields

List item
Country_ID
Dialing_Code
ISO_Alpha2
ISO_Alpha3
ISO_Full

I would like to map only selected fields from this entity model to my domain class.

My domain model class is

public class DomainCountry
{
    public int Country_ID { get; set; }
    public string Dialing_Code { get; set; }
    public string ISO_3166_1_Alpha_2 { get; set; }
}

The following will work, however insert or update is not possible. In order to get insert or update we need to use ObjectSet<>, but it will not support in my case.

IQueryable<DomainCountry> countries =
    context.Countries.Select(
        c =>
        new DomainCountry
            {
                Country_ID = c.Country_Id,
                Dialing_Code = c.Dialing_Code,
                ISO_3166_1_Alpha_2 = c.ISO_3166_1_Alpha_2
            });

Is there a nice solution for this? It wound be really fantastic.

Ideally it will be kind of proxy class which will support all the futures however highly customizable.

That is, only the columns we want to expose to the outer world.

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