启用迁移不起作用

我想asp.net的身份加入到我的Web API，我输入的package manager console：启用迁移不起作用

PM> Enable-Migrations

但我得到这个错误：

Cannot determine a valid start-up project. Using project 'MySite.API' instead. Your configuration file and working directory may not be set as expected. Use the -StartUpProjectName parameter to set one explicitly. Use the -Verbose switch for more information.

No context type was found in the assembly 'MySite.API'.

我确信Web API项目是默认项目，并且是在下拉列表中选择的项目。

这是我packages.Config：

<packages> 
    <package id="Antlr" version="3.4.1.9004" targetFramework="net45" /> 
    <package id="bootstrap" version="3.0.0" targetFramework="net45" /> 
    <package id="EntityFramework" version="6.1.3" targetFramework="net45" /> 
    <package id="jQuery" version="1.10.2" targetFramework="net45" /> 
    <package id="jQuery.Validation" version="1.11.1" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.Identity.Core" version="2.2.1" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.Identity.EntityFramework" version="2.2.1" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.Identity.Owin" version="2.2.1" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.Mvc" version="5.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.Razor" version="3.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.WebApi" version="5.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net45" /> 
    <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.3" targetFramework="net45" /> 
    <package id="Microsoft.Owin" version="2.1.0" targetFramework="net45" /> 
    <package id="Microsoft.Owin.Security" version="2.1.0" targetFramework="net45" /> 
    <package id="Microsoft.Owin.Security.Cookies" version="2.1.0" targetFramework="net45" /> 
    <package id="Microsoft.Owin.Security.OAuth" version="2.1.0" targetFramework="net45" /> 
    <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" /> 
    <package id="Modernizr" version="2.6.2" targetFramework="net45" /> 
    <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net45" /> 
    <package id="Owin" version="1.0" targetFramework="net45" /> 
    <package id="WebGrease" version="1.5.2" targetFramework="net45" /> 
</packages>

任何想法是可以导致的？

来源

2017-05-24 user3378165

请问如果添加它的工作'-ProjectName MySite.Api' –

@PeterMorris我试过了，没有工作。 – user3378165

我的意思不是粗鲁，但是，我假设你不是很熟悉EF代码，所以我强烈建议你按照本教程[EF教程]（http://www.entityframeworktutorial.net/code -first/entity-framework-code-first.aspx） –

运行Enable-Migrations命令在软件包管理控制台

Enable-Migrations -ProjectName <String> -StartUpProjectName <String> -Verbose

来源

2017-05-25 06:33:54 NIts577

谢谢，是什么意思？ – user3378165

Enable-Migrations -ProjectName -StartUpProjectName -Verbose – NIts577

我运行了它，但出现错误：'在程序集'Mivhar.API'中找不到上下文类型。' – user3378165

启用迁移不起作用

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