的 EF5表每类型示例，我发现，如这个使用 [表（表名）] 属性的一类标记为定义的表。

Examples of EF5 Table Per Type that I have found, such as this one use the [Table("tablename")] attribute to mark a class as defining a table.

当我加入这个属性我得到的错误：

When I add this attribute I get errors:

Error   1   The type or namespace name 'TableAttribute' could not be found (are you missing a using directive or an assembly reference?)    E:\EShared\Syrius6\syrius_syrius\SBD.Syrius.DomainClasses\Classes.cs    599 6   DomainClasses
Error   2   The type or namespace name 'TableAttribute' could not be found (are you missing a using directive or an assembly reference?)    E:\EShared\Syrius6\syrius_syrius\SBD.Syrius.DomainClasses\Classes.cs    599 6   DomainClasses

我也行

 using System.ComponentModel.DataAnnotations;

在我的空间

和我使用的框架4，因为我想要的应用程序在Windows XP上运行。

And I am using framework 4 because I want the app to run on Windows XP.

[更新]我一看标记为可重复的here,并因此增加了一个参考System.Data.Linq程序和使用将System.Data.Linq

[Update] I had a look at the link flagged as a possible duplicate here, and as a consequence added a reference to System.Data.Linq and a using System.Data.Linq

该错误消息是现在

 Error  1   The type or namespace name 'TableAttribute' could not be found (are you missing a using directive or an assembly reference?)    E:\EShared\Syrius6\syrius_syrius\SBD.Syrius.DomainClasses\Classes.cs    599 6   DomainClasses
Error   2   Using the generic type 'System.Data.Linq.Table<TEntity>' requires 1 type arguments  E:\EShared\Syrius6\syrius_syrius\SBD.Syrius.DomainClasses\Classes.cs    599 6   DomainClasses

重要的是，我希望我的code工作在Windows XP中，第二个答案可能重复要求框架4.5

Importantly, I want my code to work on Windows XP , and the second answer to the possible duplicate requires framework 4.5

[更新] code是如下：

[Update] Code is as follows;

namespace SBD.Syrius.DomainClasses
{
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.ComponentModel.DataAnnotations;
 using System.Data.Linq;

 [Table("Product")]
 public class Product : LoggedEntity
 { 
    [Required]
    public string BuyUnitMeasure { get; set; }
    [Required]
    public Decimal BuyUnitQuantity { get; set; }
    [Required]
    public String Code { get; set; }
    [Required]
    public string Name { get; set; }
    [Required]
    public String SellUnitMeasure { get; set; }
    [Required]
    public Decimal SellUnitQuantity { get; set; }

    public virtual Template Template { get; set; }
    [Required]
    public string UnitMeasure { get; set; }


    public override string ToString()
    {
        return !string.IsNullOrEmpty(this.Name) ? this.Name : "Products";
    }

}

 public abstract class LoggedEntity
{
    public int Id { get; set; }
    public Guid RowId { get; set; }

    [ConcurrencyCheck]
    public int RowVersionId { get; set; }

    public int SourceSiteNumber { get; set; }

 }
}

[更新]

[Update]

我纠正了使用被 使用System.Data.Linq.Mapping;

I corrected the using to be using System.Data.Linq.Mapping;

现在我的错误是

 System.Data.Linq.Mapping.TableAttribute' does not contain a constructor that takes 1 arguments  

[更新]

[Update]

我也看了看没有接受答案的建议重复的问题。这是使用System.ComponentModel.DataAnnotations然而，这需要架构4.5，我不认为我可以使用，因为它不会在Windows XP上运行，而我需要在XP上运行。

I also looked at the not accepted answer to the suggested duplicate question. Which is to use System.ComponentModel.DataAnnotations however this requires framework 4.5 and I don't think I can use that because it wont run on Windows XP, and I need to run on XP.

[更新]

[update]

我开发的Windows 7，但应用程序需要在XP上运行。 我看到的例子中，我试图按照 这是一次使用框架4.1流利

I am developing on Windows 7 but the application needs to run on XP. I see the example I am trying to follow Here it is again uses Framework 4.1 Fluent

我的问题是，我可以使用TPT上EF5在Windows XP上运行？ 如果是这样，怎么样？

My question is Can I use TPT on EF5 to run on Windows XP? If so, how?

推荐答案

首先，删除将System.Data.Linq 命名空间，并且不使用 TableAttribute 从那里。这是LINQ到SQL而不是实体框架。

First of all, remove the System.Data.Linq namespace and don't use the TableAttribute from there. It is for LINQ-to-SQL and not for Entity Framework.

之间的版本4.1和5.0实体框架的表格属性（其中包括）已被搬来搬去的命名空间和组件之间的一点：

Between version 4.1 and 5.0 of Entity Framework the Table attribute (among others) has been moved around a bit between namespaces and assemblies:

根据不同的版本，你可以在follwing地方找到的属性：

Depending on the version you can find the attribute at the follwing places:

添加引用 EntityFramework.dll 组装到项目 添加使用System.ComponentModel.DataAnnotations; 来code文件 Add reference to EntityFramework.dll assembly to your project Add using System.ComponentModel.DataAnnotations; to code file 添加引用 EntityFramework.dll 组装到项目 添加使用System.ComponentModel.DataAnnotations.Schema; 来code文件 Add reference to EntityFramework.dll assembly to your project Add using System.ComponentModel.DataAnnotations.Schema; to code file 添加引用 System.ComponentModel.DataAnnotations.dll 组装到项目 添加使用System.ComponentModel.DataAnnotations.Schema; 来code文件 Add reference to System.ComponentModel.DataAnnotations.dll assembly to your project Add using System.ComponentModel.DataAnnotations.Schema; to code file

在 TableAttribute 保留了其古老的目的和意义在所有版本。尤其是它的正确使用的TPT。

The TableAttribute has kept its old purpose and meaning in all versions. Especially it's the correct one to use for TPT.

在你的情况下，你要支持Windows XP，但使用EF 5.0则需要.NET 4.0作为目标框架。为了得到正确的 TableAttribute 你要做的：

In your situation where you want to support Windows XP but use EF 5.0 you need .NET 4.0 as target framework. To get the correct TableAttribute you have to do:

添加引用 EntityFramework.dll 组件项目（最可能是你有话） 在检查该DLL（鼠标右键 - >属性）有版本号4.4。您可以潜在地具有错误的版本（5.0），如果你下载的NuGet包，而你的项目针对性的.NET 4.5。你后来改的框架.NET 4.0。在这种情况下删除参考目前 EntityFramework.dll 并添加引用，在该 EntityFramework.dll 组装路径包\ EntityFramework.5.0.0 \ lib目录\ net40 根据您的解决方案文件夹 添加使用System.ComponentModel.DataAnnotations.Schema; 来code文件 Add reference to EntityFramework.dll assembly to your project (most likely you have that already) Check if this DLL (right mouse -> Properties) has version number 4.4. You can potentially have the wrong version (5.0) if you downloaded the Nuget package while your project targetted .NET 4.5. and you changed the framework later to .NET 4.0. In that case remove the reference to the current EntityFramework.dll and add a reference to the EntityFramework.dll assembly in the path packages\EntityFramework.5.0.0\lib\net40 under your solution folder Add using System.ComponentModel.DataAnnotations.Schema; to code file

先说最后这三点，也许这是你必须追加 .Schema 到使用指令。

Start with the last of these three points, maybe it's your only problem that you have to append .Schema to the using directive.