我正在使用Entity Framework 6.0开发Window Forms项目。我应用数据库优先方法并使用Visual Studio向导创建edmx文件。像所有其他人一样，我也生成预先生成的视图以提高性能。我用了Entity Framework Power Tools。它可以工作并生成my_EF.views.cs文件。
但我的第一个查询仍然需要很长时间。
我怀疑我的项目文件结构可能是问题所在。在我的解决方案资源管理器中，我有两个项目“ MyApp.GUI ”（Windows窗体项目）和“ MyApp.DataAccess ”（类库项目）。我将“MyApp.DataAccess”的引用 dll 添加到“MyApp.GUI”。
我的实体框架 edmx 文件位于“ MyApp.DataAccess ”项目中。我不知道在“ MyApp.DataAccess ”类库或“ MyApp.GUI ”windows窗体项目中放置预生成的视图文件的位置。目前，预生成的视图文件位于“ MyApp.DataAccess ”类库中。
我的问题与我的项目文件结构有关吗？或者，可能是预生成的视图文件不起作用（由Entity Framework Power Tools生成）？这是我预先生成的视图文件。请建议我可能的解决方案。
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
using System.Data.Entity.Infrastructure.MappingViews;
[assembly: DbMappingViewCacheTypeAttribute(
typeof(TheWayPointOfSale.DataAccess.TheWayPOSEntities),
typeof(Edm_EntityMappingGeneratedViews.ViewsForBaseEntitySetsa6f884d523752b7a79e1bab1a97ba058ffdac6b45a04cc850e30f503a4e1fc49))]
namespace Edm_EntityMappingGeneratedViews
{
using System;
using System.CodeDom.Compiler;
using System.Data.Entity.Core.Metadata.Edm;
/// <summary>
/// Implements a mapping view cache.
/// </summary>
[GeneratedCode("Entity Framework Power Tools", "0.9.0.0")]
internal sealed class ViewsForBaseEntitySetsa6f884d523752b7a79e1bab1a97ba058ffdac6b45a04cc850e30f503a4e1fc49 : DbMappingViewCache
{
/// <summary>
/// Gets a hash value computed over the mapping closure.
/// </summary>
public override string MappingHashValue
{
get { return "a6f884d523752b7a79e1bab1a97ba058ffdac6b45a04cc850e30f503a4e1fc49"; }
}
/// <summary>
/// Gets a view corresponding to the specified extent.
/// </summary>
/// <param name="extent">The extent.</param>
/// <returns>The mapping view, or null if the extent is not associated with a mapping view.</returns>
public override DbMappingView GetView(EntitySetBase extent)
{
if (extent == null)
{
throw new ArgumentNullException("extent");
}
var extentName = extent.EntityContainer.Name + "." + extent.Name;
if (extentName == "TheWayPOSModelStoreContainer.Products")
{
return GetView0();
}
if (extentName == "TheWayPOSModelStoreContainer.Um")
{
return GetView1();
}
if (extentName == "TheWayPOSModelStoreContainer.Products_Um")
{
return GetView2();
}
if (extentName == "TheWayPOSEntities.Products")
{
return GetView3();
}
if (extentName == "TheWayPOSEntities.Ums")
{
return GetView4();
}
if (extentName == "TheWayPOSEntities.Products_Um")
{
return GetView5();
}
return null;
}
/// <summary>
/// Gets the view for TheWayPOSModelStoreContainer.Products.
/// </summary>
/// <returns>The mapping view.</returns>
private static DbMappingView GetView0()
{
return new DbMappingView(@"
SELECT VALUE -- Constructing Products
[TheWayPOSModel.Store.Products](T1.[Products.product_code], T1.[Products.product_name], T1.[Products.buying_price], T1.[Products.discount_percentage], T1.[Products.retail_price], T1.[Products.wholesale_price], T1.Products_supplier, T1.[Products.created_at], T1.[Products.updated_at])
FROM (
SELECT
T.product_code AS [Products.product_code],
T.product_name AS [Products.product_name],
T.buying_price AS [Products.buying_price],
T.discount_percentage AS [Products.discount_percentage],
T.retail_price AS [Products.retail_price],
T.wholesale_price AS [Products.wholesale_price],
T.supplier AS Products_supplier,
T.created_at AS [Products.created_at],
T.updated_at AS [Products.updated_at],
True AS _from0
FROM TheWayPOSEntities.Products AS T
) AS T1");
}
/// <summary>
/// Gets the view for TheWayPOSModelStoreContainer.Um.
/// </summary>
/// <returns>The mapping view.</returns>
private static DbMappingView GetView1()
{
return new DbMappingView(@"
SELECT VALUE -- Constructing Um
[TheWayPOSModel.Store.Um](T1.[Um.um_code], T1.[Um.um_shortname], T1.[Um.um_fullname], T1.Um_disposable, T1.[Um.disposed_um_code], T1.[Um.disposed_um_qty], T1.[Um.depend_on_product], T1.[Um.created_at], T1.[Um.updated_at])
FROM (
SELECT
T.um_code AS [Um.um_code],
T.um_shortname AS [Um.um_shortname],
T.um_fullname AS [Um.um_fullname],
T.disposable AS Um_disposable,
T.disposed_um_code AS [Um.disposed_um_code],
T.disposed_um_qty AS [Um.disposed_um_qty],
T.depend_on_product AS [Um.depend_on_product],
T.created_at AS [Um.created_at],
T.updated_at AS [Um.updated_at],
True AS _from0
FROM TheWayPOSEntities.Ums AS T
) AS T1");
}
/// <summary>
/// Gets the view for TheWayPOSModelStoreContainer.Products_Um.
/// </summary>
/// <returns>The mapping view.</returns>
private static DbMappingView GetView2()
{
return new DbMappingView(@"
SELECT VALUE -- Constructing Products_Um
[TheWayPOSModel.Store.Products_Um](T1.[Products_Um.id], T1.[Products_Um.product_code], T1.[Products_Um.um_code], T1.[Products_Um.disposed_um_code], T1.[Products_Um.disposed_um_qty])
FROM (
SELECT
T.id AS [Products_Um.id],
T.product_code AS [Products_Um.product_code],
T.um_code AS [Products_Um.um_code],
T.disposed_um_code AS [Products_Um.disposed_um_code],
T.disposed_um_qty AS [Products_Um.disposed_um_qty],
True AS _from0
FROM TheWayPOSEntities.Products_Um AS T
) AS T1");
}
/// <summary>
/// Gets the view for TheWayPOSEntities.Products.
/// </summary>
/// <returns>The mapping view.</returns>
private static DbMappingView GetView3()
{
return new DbMappingView(@"
SELECT VALUE -- Constructing Products
[TheWayPOSModel.Product](T1.[Product.product_code], T1.[Product.product_name], T1.[Product.buying_price], T1.[Product.discount_percentage], T1.[Product.retail_price], T1.[Product.wholesale_price], T1.Product_supplier, T1.[Product.created_at], T1.[Product.updated_at])
FROM (
SELECT
T.product_code AS [Product.product_code],
T.product_name AS [Product.product_name],
T.buying_price AS [Product.buying_price],
T.discount_percentage AS [Product.discount_percentage],
T.retail_price AS [Product.retail_price],
T.wholesale_price AS [Product.wholesale_price],
T.supplier AS Product_supplier,
T.created_at AS [Product.created_at],
T.updated_at AS [Product.updated_at],
True AS _from0
FROM TheWayPOSModelStoreContainer.Products AS T
) AS T1");
}
/// <summary>
/// Gets the view for TheWayPOSEntities.Ums.
/// </summary>
/// <returns>The mapping view.</returns>
private static DbMappingView GetView4()
{
return new DbMappingView(@"
SELECT VALUE -- Constructing Ums
[TheWayPOSModel.Um](T1.[Um.um_code], T1.[Um.um_shortname], T1.[Um.um_fullname], T1.Um_disposable, T1.[Um.disposed_um_code], T1.[Um.disposed_um_qty], T1.[Um.depend_on_product], T1.[Um.created_at], T1.[Um.updated_at])
FROM (
SELECT
T.um_code AS [Um.um_code],
T.um_shortname AS [Um.um_shortname],
T.um_fullname AS [Um.um_fullname],
T.disposable AS Um_disposable,
T.disposed_um_code AS [Um.disposed_um_code],
T.disposed_um_qty AS [Um.disposed_um_qty],
T.depend_on_product AS [Um.depend_on_product],
T.created_at AS [Um.created_at],
T.updated_at AS [Um.updated_at],
True AS _from0
FROM TheWayPOSModelStoreContainer.Um AS T
) AS T1");
}
/// <summary>
/// Gets the view for TheWayPOSEntities.Products_Um.
/// </summary>
/// <returns>The mapping view.</returns>
private static DbMappingView GetView5()
{
return new DbMappingView(@"
SELECT VALUE -- Constructing Products_Um
[TheWayPOSModel.Products_Um](T1.[Products_Um.id], T1.[Products_Um.product_code], T1.[Products_Um.um_code], T1.[Products_Um.disposed_um_code], T1.[Products_Um.disposed_um_qty])
FROM (
SELECT
T.id AS [Products_Um.id],
T.product_code AS [Products_Um.product_code],
T.um_code AS [Products_Um.um_code],
T.disposed_um_code AS [Products_Um.disposed_um_code],
T.disposed_um_qty AS [Products_Um.disposed_um_qty],
True AS _from0
FROM TheWayPOSModelStoreContainer.Products_Um AS T
) AS T1");
}
}
}
答案 0 :(得分：0)
我知道这些信息不值得回答。但对于像我这样的其他新手，我想分享一下我的经历。
根据Maarten的评论，我在每个预先生成的视图文件中都添加了断点。 DataAccess 类库中的预生成视图被断点命中。因此，通常可以假设将预生成的视图文件放在edmx文件所在的 DataAccess 类库中（在我的各种情况下）。