我正在尝试将关系数据库合并到我的项目中。 RDBMS的在我的项目实施之前,一般情况下我通常能够通过这个代码来访问我的理想值:如何使用asp.net实体框架在sql外键中获取数据?
public static string guitar { get; set; }
public static List<stringInstrumentItem> GetGuitarItems()
{
List<stringInstrumentItem> list2 = new List<stringInstrumentItem>();
MusicStoreDBEntities obj2 = new MusicStoreDBEntities();
list2 = (from g in obj2.stringInstrumentItems where g.brand == guitar select g).ToList();
return list2;
}
但现在,我已经设置在我的SQL脚本外键,g.brand是不工作,因为它不再包含文本值,它现在是一个名为brandId的int。为了更好地理解我的问题,以下是stringInstrumentItem表的sql脚本。这是我设置引用品牌表和主键的外键brandId的地方。
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[stringInstrumentItem](
[itemId] [int] NOT NULL,
[type] [varchar](50) NOT NULL,
[brandId] [int] FOREIGN KEY REFERENCES brand(brandId),
[model] [varchar](50) NOT NULL,
[price] [float] NOT NULL,
[itemimage1] [varchar](255) NULL,
[itemimage2] [varchar](255) NULL,
[description] [text] NOT NULL,
[necktype] [varchar](100) NOT NULL,
[body] [varchar](100) NOT NULL,
[fretboard] [varchar](100) NOT NULL,
[fret] [varchar](50) NOT NULL,
[bridge] [varchar](100) NOT NULL,
[neckpickup] [varchar](100) NOT NULL,
[bridgepickup] [varchar](100) NOT NULL,
[hardwarecolor] [varchar](50) NOT NULL,
PRIMARY KEY CLUSTERED
(
[itemId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY =
OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
现在这里是品牌表。这是stringInstrumentItem所指的表。
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[brand](
[brandId] [int] NOT NULL,
[type] [varchar](50) NOT NULL,
[name] [varchar](50) NOT NULL,
[image] [varchar](255) NULL,
PRIMARY KEY CLUSTERED
(
[brandId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY =
OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
我的目标是能够访问一个域名为名称的品牌表通过stringInstrumentItem表使用asp.net和实体框架的价值。我没有真正找到答案。我希望你们能帮助我解决这个问题。
最简单的方法是做的两个步骤。首先获取id,然后找到具有该id的对象。 – pijemcolu