类型"System.Data.Linq.DataContext"在未引用的程序集中定义

本文介绍了类型"System.Data.Linq.DataContext"在未引用的程序集中定义的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

问题

转到特定页面时(在本地调试中)时出错:CS0012:类型'System.Data.Linq.DataContext'在未引用的程序集中定义.您必须添加对程序集'System.Data.Linq，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089'的引用.

Error when going to a specific page (in local debug): CS0012: The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

以下是错误消息中引用的代码行:

Here are the referenced lines of code in the error message:

第28行: 第29行: 第30行:公共类_Page_Views_blah_granny_cshtml:System.Web.Mvc.WebViewPage { 第31行: 第32行:#line隐藏了

Line 28: Line 29: Line 30: public class _Page_Views_blah_granny_cshtml : System.Web.Mvc.WebViewPage { Line 31: Line 32: #line hidden

所有其他页面都很好用-仅在访问特定页面时才会发生这种情况.该参考在其他所有页面上均有效.据我所能确定的，这与参考文献无关.

All other pages work great - this only happens when accessing one page in particular. The reference is working on all other pages. As far as I am able to determine, this is not a problem with the reference.

我花了很多时间研究这个问题.

I've spent a good block of time researching this issue.

我发现的所有答案都建议转到web.config并将程序集引用放在linq的system.web>配置>程序集中.我的没有列出程序集，我怀疑这对于较旧的版本来说更多.无论如何我都做到了.它给了我另一个错误，说它不知道如何处理程序集.

All the answers I found suggested going to web.config and putting an assembly reference to linq in system.web > configuration > assemblies. Mine doesn't have assemblies listed and I suspect this is more for older versions. I did it anyway. It gave me another error saying it has no idea what to do with assemblies.

我删除了system.data.linq并再次添加了它.

I deleted system.data.linq and added it in again.

我重新启动了VS和计算机.

I rebooted both VS and my computer.

我的代码-由VS默认生成-具有System.Linq.

My code - as generated by default by VS - has System.Linq.

背景-这是这样开始的:

该应用程序是MVC 4，C#.

The application is MVC 4, C#.

我在DataContext中创建了一个新类，添加了一个新的控制器，并创建了一个强类型的视图.

I created a new class in my DataContext, added a new controller, and created a strongly typed view.

这里有一些非常相似的代码(可能不需要，但以防万一).

Here is some very similar code (likely not needed, but just in case).

两个类:

public class granny { public string data { get; set; } public string criteria { get; set; } } public List<granny> getGranny() { var a = from x in grannytable join dx in anothertable on x.criteria equals dx.criteria select new granny { data = x.somenewdata; }; return a.ToList(); }

这是控制器:

public ActionResult granny() { return View(db.getGranny()); }

那里什么都没有.

该页面是典型的剃刀视图，其类型为强力的列表" ...它具有要迭代创建的表，并随即转储数据.

The page is a typical razor view, strongly typed "List"...it has a table that it iterates to create, dumping the data as it goes.

很高兴根据需要提供其他任何代码.

I am happy to provide any additional code as needed.

我还没有弄乱web.config.我尚未删除或调整页面上的任何参考.所有其他视图都很棒.

I have not messed with web.config. I have not removed or tweaked any of the references on the pages. All of the other views work marvelously.

当我在本地运行它并尝试转到/granny时，出现上述错误.

When I run it locally, and attempt to go to /granny I get the above error.

感谢您的帮助！

解决方案:我参考了System.Linq(对于旧版本，我想是System.Data.Linq)，并将CopyLocal更改为True.

THE SOLUTION: I went into references, and for the System.Linq (or for older versions, I suppose, System.Data.Linq) and changed CopyLocal to True.

推荐答案

这对我有用:

• 导航到Web项目的引用"节点
• 找到对System.Data.Linq的引用
• 打开VS属性窗口
• 在属性窗口中，将复制本地:错误"更改为真"

在此之前，未将System.Data.Linq.dll复制到bin目录中. (将其手动复制到bin目录中也解决了该错误)

Before this, the System.Data.Linq.dll was not being copied into the bin directory. (Copying it manually into the bin directory also resolved the error)