我正在嘗試將關係數據庫合併到我的項目中。 RDBMS的在我的項目實施之前,一般情況下我通常能夠通過這個代碼來訪問我的理想值:如何使用asp.net實體框架在sql外鍵中獲取數據?
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;
}
但現在,我已經設置在我的SQL腳本外鍵,g.brand是不工作,因爲它不再包含文本值,它現在是一個名爲brandId的int。爲了更好地理解我的問題,以下是stringInstrumentItem表的sql腳本。這是我設置引用品牌表和主鍵的外鍵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
現在這裏是品牌表。這是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
我的目標是能夠訪問一個域名爲名稱的品牌表通過stringInstrumentItem表使用asp.net和實體框架的價值。我沒有真正找到答案。我希望你們能幫助我解決這個問題。
最簡單的方法是做的兩個步驟。首先獲取id,然後找到具有該id的對象。 – pijemcolu