今天我在Win 7上安装了最新版本的ASP.NET Core 1.0和VS2015 Update 3(于6月27日发布)。并遵循MS文章并在this step of the article上收到以下错误:
Unable to find expected assembly attribute named DesignTimeProviderServicesAttribute in provider assembly Microsoft.EntityFrameworkCore. This attribute is required to identify the class which acts as the design-time service provider factory.
我的命令如下:
Scaffold-DbContext "Server=MyComputerName\SQL2012;Database=northwind;Trusted_Connection=True;" -OutputDir ".\Models" Microsoft.EntityFrameworkCore
project.json提交一个部分
"tools": {
"BundlerMinifier.Core": "2.0.238",
"Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
"Microsoft.Extensions.SecretManager.Tools": "1.0.0-preview2-final",
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview2-final",
"imports": [
"portable-net45+win8"
]
}
},
在使用SQL Express 2014的win 8.1中,使用上面的ASP.NET Core和VS2015 Update 3版本,我可以成功地完成上述文章中的所有步骤而不会出现任何错误。
答案 0 :(得分:0)
有人帮我指出了我的错误。由于我使用的是SQL Server,因此Scaffold-DbContext
命令中的最后一个参数应为Microsoft.EntityFrameworkCore.SqlServer
。以下作品:
Scaffold-DbContext "Server=MyComputerName\SQL2012;Database=northwind;Trusted_Connection=True;" -OutputDir ".\Models" Microsoft.EntityFrameworkCore.SqlServer