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[英]Unable to find Unable to find package 'Microsoft.EntityFrameworkCore.SqlServer'
[英]Microsoft.EntityFrameworkCore.SqlServer dependency could not be resolved
我正在嘗試在VS 2015 Update 3中安裝Entity Framework Core,因此可以從現有數據庫對EF模型進行反向工程。 我正在按照Microsoft的指示在這里: https : //docs.microsoft.com/zh-cn/ef/core/get-started/aspnetcore/existing-db 。
但是,只要將此行添加到我的project.json文件中:
"Microsoft.EntityFrameworkCore.SqlServer": "1.1.0"
我的參考中出現“程序包還原失敗”錯誤,說無法解決依賴關系。 無論指定哪個版本,我都會遇到同樣的錯誤。
以下是我package.json文件的全部內容-我添加的唯一一行是上述內容。 默認情況下,當我從“新ASP.NET Core Web應用程序”模板創建項目時,其余所有內容都在那里。
我嘗試添加對Microsoft.EntityFrameworkCore的引用,如下所示: 如何解決對Microsoft.EntityFrameworkCore.SqlServer和Microsoft.EntityFrameworkCore.Tools的依賴關系? ,但相對於該引用,我仍然收到相同的錯誤消息(同樣,無論我指定的是哪個版本)。
誰能解釋這個問題是什么,一個人應該如何從提供的最少信息中找出問題所在?
{
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.1",
"type": "platform"
},
"Microsoft.ApplicationInsights.AspNetCore": "1.0.0",
"Microsoft.AspNetCore.Diagnostics": "1.0.0",
"Microsoft.AspNetCore.Mvc": "1.0.1",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
},
"Microsoft.AspNetCore.Routing": "1.0.1",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
"Microsoft.AspNetCore.StaticFiles": "1.0.0",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
"Microsoft.Extensions.Configuration.Json": "1.0.0",
"Microsoft.Extensions.Logging": "1.0.0",
"Microsoft.Extensions.Logging.Console": "1.0.0",
"Microsoft.Extensions.Logging.Debug": "1.0.0",
"Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
"Microsoft.EntityFrameworkCore.SqlServer": "1.1.0"
},
"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"
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"portable-net45+win8"
]
}
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"configProperties": {
"System.GC.Server": true
}
},
"publishOptions": {
"include": [
"wwwroot",
"**/*.cshtml",
"appsettings.json",
"web.config"
]
},
"scripts": {
"prepublish": [ "bower install", "dotnet bundle" ],
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}
原來對我來說問題是無效的軟件包源。 我在NuGet軟件包管理器中刪除了無效的源,然后可以添加引用。
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