我有一对多关系中的两个表。 (产品和价格中断定价)。在数据库级别,我无法在两个表之间创建关系。我把这两张表带入LINQ并手动创建了关联。LINQ to SQL:内部连接与SQL 2000上的手动关联
我需要做一个大的LINQ查询,并加入表格。我的问题是它没有使用连接来获取数据。 LINQ在主表上使用1选择,然后1选择该主表中的每一行。
Dim db As New LSSStyleDataContext(connString)
Dim options As New DataLoadOptions()
options.LoadWith(Function(c As commerce_product) c.commerce_qty_breaks)
db.LoadOptions = options
Dim dbProducts = (From prods In db.commerce_products).ToList
有关为什么这可能是任何想法?谢谢! 保罗
编辑:这里有两个表:
CREATE TABLE [dbo].[commerce_product](
[pf_id] [int] NOT NULL,
[name] [varchar](500) COLLATE SQL_Latin1_General_CP1_CI_AS
[description] [text] COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[restricted] [varchar](5) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
CONSTRAINT [PK_commerce_product_1] PRIMARY KEY NONCLUSTERED
(
[pf_id] ASC
) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
而其他表:
CREATE TABLE [dbo].[commerce_qty_break](
[pf_id] [int] NOT NULL,
[sku] [varchar](100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[qty] [int] NOT NULL,
[list_price] [int] NOT NULL,
[break_id] [int] NOT NULL,
CONSTRAINT [PK_commerce_qty_break] PRIMARY KEY CLUSTERED
(
[pf_id] ASC,
[qty] ASC,
[break_id] ASC
) ON [PRIMARY]
) ON [PRIMARY]
的DBML是直的,只有两张桌子前。我在两个表之间创建了一个关联,“commerce_product”是父项,“commerce_qty_break”是由“PF_ID”连接的子项。
我可以写这样的事:
Dim dbproducts = From prods In db.commerce_products _
Join qtys In db.commerce_qty_breaks On prods.pf_id Equals qtys.pf_id _
Select prods
,我看到它连接在查询表中,但只要我尝试并旋通过“qty_breaks”它开始执行选择获得该信息。
我完全难住。
编辑2:这里是DBML:
<?xml version="1.0" encoding="utf-8"?>
<Database Name="LSScommerceDB_DevB" Class="LSSStyleDataContext" xmlns="http://schemas.microsoft.com/linqtosql/dbml/2007">
<Connection Mode="AppSettings" ConnectionString="***" SettingsObjectName="HSLPriceUpdate.My.MySettings" SettingsPropertyName="LSScommerceDB_DevBConnectionString" Provider="System.Data.SqlClient" />
<Table Name="dbo.commerce_product" Member="commerce_products">
<Type Name="commerce_product">
<Column Name="pf_id" Type="System.Int32" DbType="Int NOT NULL" IsPrimaryKey="true" CanBeNull="false" />
<Column Name="name" Type="System.String" DbType="VarChar(500)" CanBeNull="true" />
<Column Name="description" Type="System.String" DbType="Text" CanBeNull="true" UpdateCheck="Never" />
<Column Name="list_price" Type="System.Int32" DbType="Int" CanBeNull="true" />
<Column Name="image_file" Type="System.String" DbType="VarChar(255)" CanBeNull="true" />
<Column Name="image_width" Type="System.Int32" DbType="Int" CanBeNull="true" />
<Column Name="image_height" Type="System.Int32" DbType="Int" CanBeNull="true" />
<Column Name="sale_price" Type="System.Int32" DbType="Int" CanBeNull="true" />
<Column Name="sale_start" Type="System.DateTime" DbType="DateTime" CanBeNull="true" />
<Column Name="sale_end" Type="System.DateTime" DbType="DateTime" CanBeNull="true" />
<Column Name="attr_label1" Type="System.String" DbType="VarChar(100)" CanBeNull="true" />
<Column Name="attr_label2" Type="System.String" DbType="VarChar(100)" CanBeNull="true" />
<Column Name="attr_label3" Type="System.String" DbType="VarChar(100)" CanBeNull="true" />
<Column Name="attr_label4" Type="System.String" DbType="VarChar(100)" CanBeNull="true" />
<Column Name="attr_label5" Type="System.String" DbType="VarChar(100)" CanBeNull="true" />
<Column Name="sku" Type="System.String" DbType="VarChar(100)" CanBeNull="true" />
<Column Name="UOM" Type="System.String" DbType="VarChar(50)" CanBeNull="true" />
<Column Name="Sell_Pack" Type="System.String" DbType="VarChar(50)" CanBeNull="true" />
<Column Name="mfg_model_number" Type="System.String" DbType="VarChar(50)" CanBeNull="true" />
<Column Name="mfg_id" Type="System.Int32" DbType="Int" CanBeNull="true" />
<Column Name="logo_file" Type="System.String" DbType="VarChar(255)" CanBeNull="true" />
<Column Name="drop_ship" Type="System.String" DbType="VarChar(50)" CanBeNull="true" />
<Column Name="lead_time" Type="System.Int32" DbType="Int" CanBeNull="true" />
<Column Name="hazard_flag" Type="System.String" DbType="VarChar(50)" CanBeNull="true" />
<Column Name="publish_date" Type="System.DateTime" DbType="DateTime" CanBeNull="true" />
<Column Name="restricted" Type="System.String" DbType="VarChar(5)" CanBeNull="true" />
<Association Name="commerce_product_commerce_qty_break" Member="commerce_qty_breaks" ThisKey="pf_id" OtherKey="pf_id" Type="commerce_qty_break" />
</Type>
</Table>
<Table Name="dbo.commerce_qty_break" Member="commerce_qty_breaks">
<Type Name="commerce_qty_break">
<Column Name="pf_id" Type="System.Int32" DbType="Int NOT NULL" IsPrimaryKey="true" CanBeNull="false" />
<Column Name="sku" Type="System.String" DbType="VarChar(100) NOT NULL" CanBeNull="false" />
<Column Name="qty" Type="System.Int32" DbType="Int NOT NULL" IsPrimaryKey="true" CanBeNull="false" />
<Column Name="list_price" Type="System.Int32" DbType="Int NOT NULL" CanBeNull="false" />
<Column Name="sale_price" Type="System.Int32" DbType="Int" CanBeNull="true" />
<Column Name="sale_start" Type="System.DateTime" DbType="DateTime NOT NULL" CanBeNull="false" />
<Column Name="sale_end" Type="System.DateTime" DbType="DateTime" CanBeNull="true" />
<Column Name="break_id" Type="System.Int32" DbType="Int NOT NULL" IsPrimaryKey="true" CanBeNull="false" />
<Association Name="commerce_product_commerce_qty_break" Member="commerce_product" ThisKey="pf_id" OtherKey="pf_id" Type="commerce_product" IsForeignKey="true" />
</Type>
</Table>
</Database>
编辑3:显然,这是只有在SQL 2000 SQL问题2008年工作正常。我有其他表在SQL 2000中进行急切加载,我无法弄清楚这两个表之间的区别。
你可以发布你的DBML和实体定义的细节吗? – RobS 2009-02-04 23:23:35
我已更新问题以包含更多详细信息。 – 2009-02-05 16:54:20
你也可以弹出DBML吗? Ta – RobS 2009-02-06 08:27:24