类型“System.Data.Linq.DataContext"在未引用的程序集中定义 [英] The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced

问题描述

问题

转到特定页面时出错(在本地调试中):CS0012:类型System.Data.Linq.DataContext"是在未引用的程序集中定义的.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 hidden

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

所有其他页面都运行良好 - 这仅在访问特定页面时发生.该参考文献适用于所有其他页面.据我所知，这不是参考文献的问题.

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 并在 system.web > 配置 > 程序集中放置对 linq 的程序集引用.我的没有列出程序集，我怀疑这更适用于旧版本.反正我做到了.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 并重新添加了它.

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

我重新启动了 VS 和我的计算机.

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 - 这是如何开始的:

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，添加了一个新控制器，并创建了一个强类型视图.

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

这是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());
    }

没什么特别的.

该页面是一个典型的剃刀视图，强类型的列表"......它有一个它迭代创建的表，随着数据的进行转储.

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.

我很乐意根据需要提供任何其他代码.

I am happy to provide any additional code as needed.

我没有弄乱 web.config.我没有删除或调整页面上的任何参考资料.所有其他视图都非常有效.

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:我参考了参考资料，对于 System.Linq(或者对于旧版本，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 Copy Local: False 更改为 True

在此之前，System.Data.Linq.dll 未被复制到 bin 目录中.(手动复制到bin目录下也解决了错误)

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)

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