blocks|key|5200392|text|对于那些可能在未来遇到同样问题的人。我已经解决了这个问题，只需使用Enable-Migrations而不使用-ContextTypeName。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5200393|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

For those who might stumble uppon the same problem in the future. 
I already solved it by just using Enable-Migrations without the -ContextTypeName.

blocks|key|2987205|text|我也有同样的问题。我通过NuGet将EntityFramework升级到5.0.0版本，修复了这个问题。如果您遇到EntityFramework.5.0.0的问题，请尝试重新安装它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987206|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I too had the same issue. I fixed it by upgrading the EntityFramework through NuGet to version 5.0.0. If you are facing issue with EntityFramework.5.0.0 , please try re-installing it.

blocks|key|5200672|text|我也有同样的问题，但通过在Nuget+Package+Manager控制台的下拉菜单中选择项目，然后删除完全限定的路径，使其正常工作，因此：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5200673|PM>+Enable-Migrations+-ContextTypeName+ApplicationDbContext|code-block|syntax|javascript|5200674|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I had the same issue but got it to work by selecting the project in the drop down menu of the Nuget Package Manager Console and then removing the fully qualified path, so:

<pre><code>PM&gt; Enable-Migrations -ContextTypeName ApplicationDbContext
</code></pre>

blocks|key|3470765|text|Update-Database+:找不到与参数名'ConfigurationTypeName‘匹配的参数。第1行:1字符:17|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3470766|这种参数名称不匹配的错误表示该命令的版本不支持该参数。这可能是由于VS项目中安装的EF工具的版本所致。在我的例子中，我有两个项目，一个安装了EF+6.x，另一个安装了EF+Core，显然EF+core优先，所以当使用EF+6.X时，我必须使用EntityFramework\Update-Database和EntityFrameworkCore\Update-Database。|3470767|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Update-Database : A parameter cannot be found that matches parameter name 'ConfigurationTypeName'.
At line:1 char:17

Such errors where parameter name does not match suggests the version of the command does not support that parameter. It can be due to the version of the EF tools installed on the VS project. In my case, I have 2 projects one with EF 6.x and other with EF Core installed and apparently EF core takes precedence so, when using EF 6.X I had to use EntityFramework\Update-Database and EntityFrameworkCore\Update-Database.

blocks|key|2987385|text|"Enable-Migrations+-ContextTypeName+MvcMovie.Models.MovieDBContext“|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987386|MvcMovie更改为MvcYourApplicationName。|2987387|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

"Enable-Migrations -ContextTypeName MvcMovie.Models.MovieDBContext"

MvcMovie change to MvcYourApplicationName.

blocks|key|5200408|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5200409|找不到与参数名'ContextTypeName‘匹配的参数。|blockquote|5200410|5200411|5200412|在我看来，您使用的是较旧版本的实体框架(4.3?)它没有实现该参数。适用于我，我使用EF5。|5200413|PM>+enable-migrations+-contexttypename+test3.Models.UsersContext检查上下文是否指向现有数据库...为项目test3启用代码优先迁移。|5200414|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|L|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|M|7|@]|8|@]|9|$]]|$1|D|3|-4|4|5|6|N|7|@]|8|@]|9|$]]|$1|E|3|-4|4|5|6|O|7|@]|8|@]|9|$]]|$1|F|3|G|4|5|6|P|7|@]|8|@]|9|$]]|$1|H|3|I|4|5|6|Q|7|@]|8|@]|9|$]]|$1|J|3|-4|4|5|6|R|7|@]|8|@]|9|$]]]|K|$]]

<blockquote>
 A parameter cannot be found that matches parameter name
 'ContextTypeName'.
</blockquote>

Looks to me like you're using an older version of Entity Framework (4.3?) which doesn't have that parameter implemented. Works for me and I use EF 5.

PM> enable-migrations -contexttypename test3.Models.UsersContext
Checking if the context targets an existing database...
Code First Migrations enabled for project test3.

blocks|key|5200512|text|当我在“快速和肮脏”的ASP.net+网站上工作时，也遇到了同样的错误。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5200513|在ASP.Net网站中，非页面类放在App_code目录中。它们被编译成一个单独的程序集。|5200514|可能是包管理器没有管理(!)要在这个"App_Code“程序集中找到上下文类型名称(错误消息看起来很奇怪)。|5200515|我通过将模型和上下文类移动到另一个类库项目中解决了这个问题。|5200516|5200517|it+worked|unordered-list-item|5200518|it是更干净的|5200519|5200520|我不知道MVC4有什么问题，但我的经验可以帮助其他Web表单开发人员……|5200521|entityMap^0|J|2|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|10|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|11|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|13|8|@]|D|@]|E|$]]|$1|P|3|Q|5|O|7|14|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|15|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|16|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|V|$]]

I had this very same error when working on "quick-and-dirty" ASP.net web site.

In ASP.Net Web sites, non-pages classes are put in the App_code directory.
They are compiled to form a separate assembly.

May be the package manager didn't manage (!) to find the context type name in this "App_Code" assembly (the error message looks weird).

I solved the problem by moving the model and context classes into another class library project.

<ul>
<li>it worked</li>
<li>it was far cleaner</li>
</ul>

I don't know what could be the problem with MVC 4, but my experience could help another Web Form developer...

blocks|key|2987526|text|编辑:上下文类型可能不存在，或者不在models命名空间下。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987527|语法是|2987528|启用-迁移-ContextTypeName+NameOfYourDataContextType|2987529|NameOfYourDataContextType是您在添加控制器时添加的上下文。|2987530|因此，您可以键入如下所示的全部内容：|2987531|​|2987532|📷|atomic|offset|length|2987533|2987534|或者使用现有的，如图所示：|2987535|2987536|2987537|2987538|它会是|2987539|启用-迁移-ContextTypeName+MvcApplication4.Models.MvcApplication4Context|2987540|启用-迁移-ContextTypeName+MvcApplication4.Models.ExternalLogin|2987541|只有当您的项目中只有一个上下文时，语法:+Enable-Migrations才有效。|2987542|在使用this+tutorial时遇到了这个问题|2987543|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/92a84156286be663cfa66da359ec1c2a.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/27ec1e4830ee71ca9baa123e56e70114.png|2|LINK|MUTABLE|url|http://channel9.msdn.com/Series/Building-Web-Apps-with-ASP-NET-Jump-Start/Building-Web-Apps-with-ASPNET-Jump-Start-02-Building-and-Deploying-Websites-with-ASPNET-MVC-4^0|0|0|0|0|0|0|0|1|0|0|0|0|0|0|1|1|0|0|0|0|0|0|3|D|2|0^^$0|@$1|2|3|4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1O|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1P|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1R|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1S|8|@]|9|@$O|1T|P|1U|1|1V]]|A|$]]|$1|Q|3|K|5|6|7|1W|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1X|8|@]|9|@]|A|$]]|$1|T|3|K|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|U|3|M|5|N|7|1Z|8|@]|9|@$O|20|P|21|1|22]]|A|$]]|$1|V|3|K|5|6|7|23|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|24|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|25|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|26|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|27|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|28|8|@]|9|@$O|29|P|2A|1|2B]]|A|$]]|$1|16|3|-4|5|6|7|2C|8|@]|9|@]|A|$]]]|17|$18|$5|19|1A|1B|A|$1C|1D|1E|-4]]|1F|$5|19|1A|1B|A|$1C|1G|1E|-4]]|1H|$5|1I|1A|1J|A|$1K|1L]]]]

EDIT: It seems that the context type may not be existing or is not placed under the models namespace.

The syntax is

Enable-Migrations -ContextTypeName NameOfYourDataContextType

The NameOfYourDataContextType is the context you add when adding a controller.

So you type in the whole shown in this:

<img src="https://i.stack.imgur.com/nGssr.png" alt="enter image description here">

Or use the existing which is shown:

<img src="https://i.stack.imgur.com/l6kh8.png" alt="enter image description here">

It would be 

Enable-Migrations -ContextTypeName MvcApplication4.Models.MvcApplication4Context

Enable-Migrations -ContextTypeName MvcApplication4.Models.ExternalLogin

The syntax : Enable-Migrations will only work if you only have one context in your project.

Came across this problem upon taking <a href="http://channel9.msdn.com/Series/Building-Web-Apps-with-ASP-NET-Jump-Start/Building-Web-Apps-with-ASPNET-Jump-Start-02-Building-and-Deploying-Websites-with-ASPNET-MVC-4" rel="nofollow noreferrer">this tutorial</a>

blocks|key|3471510|text|对于任何在尝试了其他解决方案后仍在苦苦挣扎的人。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3471511|在浪费2个小时尝试重启VS，更新VS并重新启动我的PC之后。我最终通过更改我的git分支并添加迁移解决了这个问题。|3471512|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

For anyone still struggling after trying the other solutions.
After wasting 2 hours trying to restart VS, updating VS and restarting my PC.
I finally solved this by changing my git branch and then adding the migration.

blocks|key|2987740|text|当我删除Z.EntityFramework.Plus.EFCore包时，问题就解决了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987741|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

When I removed Z.EntityFramework.Plus.EFCore package problem was solved

blocks|key|2987747|text|Enable+Migrations现在已过时，您可以像这样添加：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987748|EntityFrameworkCore\Add-Migration+yourMessageHere+-Context+AppContext|offset|length|style|CODE|2987749|entityMap^0|0|0|1X|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Enable Migrations is now obsolete, you can add like this: 
<code>EntityFrameworkCore\Add-Migration yourMessageHere -Context AppContext</code>

I am following this tutorial to practice MVC-4: <a href="http://www.asp.net/mvc/tutorials/mvc-4/getting-started-with-aspnet-mvc4/adding-a-new-field-to-the-movie-model-and-table" rel="nofollow">http://www.asp.net/mvc/tutorials/mvc-4/getting-started-with-aspnet-mvc4/adding-a-new-field-to-the-movie-model-and-table</a>

I am not doing the same example. I am just using it as a guideline to try something of my own.

I've come across this problem: 

After I open the package manager console

I get the following error after trying to enable migrations for my context:

<pre><code>PM&gt; Enable-Migrations -ContextTypeName MvcAuction.Models.AuctionDBContext
Enable-Migrations : A parameter cannot be found that matches parameter name 'ContextTypeName'.
At line:1 char:35
+ Enable-Migrations -ContextTypeName &lt;&lt;&lt;&lt; MvcAuction.Models.AuctionDBContext
 + CategoryInfo : InvalidArgument: (:) [Enable-Migrations], ParameterBindingException
 + FullyQualifiedErrorId : NamedParameterNotFound,Enable-Migrations
</code></pre>

Any ideas how this might be resolved?

Enable-Migrations -ContextTypeName Error: Cannot find parameter

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我遵循这个教程来练习MVC-4：我不是在做同样的例子。我只是用它作为我自己尝试一些东西的指南。我遇到了这个问题：在我打开包管理器控制台之后在尝试为我的上下文启用迁移后，我收到以下错误：PM> Enable-Migrations -ContextTypeName MvcAuction.Models.AuctionDBContextEnable-Migrations : A parameter can

问Enable-Migrations -ContextTypeName错误:无法找到参数
EN

回答 11

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问Enable-Migrations -ContextTypeName错误:无法找到参数
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