脚手架错误 - 首先使用数据库构建
Scaffolding Error - Building with Database First
提供错误
No connection string named 'Entities' could be found in the application config file.
说明与询问
我知道有人问过这个问题，但我发现 none 的答案对我有用，我相信这与我尝试在 Root > Areas > BlogPage 上搭建脚手架有关。也就是说，我还是后端开发的新手，所以我可能遗漏了一些非常明显的东西。
文件夹层次结构
添加新的脚手架输入值
Web.config
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=301879
-->
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<section name="JosephMCasey.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</sectionGroup>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --></configSections>
<connectionStrings>
<add name="DefaultConnection" connectionString="Server=tcp:AZUREDB.database.windows.net,1433;Database=AZUREUSER_db;User ID=AZUREUSER@AZUREDB;Password=PASSWORD;Trusted_Connection=False;Encrypt=True;Connection Timeout=30" providerName="System.Data.SqlClient" />
<!-- configSource="config\ConnectionStrings.config" -->
</connectionStrings>
<appSettings file="config\AppSettingsSecret.config">
<add key="webpages:Version" value="3.0.0.0" />
<add key="webpages:Enabled" value="false" />
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
</appSettings>
<system.web>
<authentication mode="None" />
<compilation debug="true" targetFramework="4.5.1" />
<httpRuntime targetFramework="4.5.1" />
<httpModules>
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Extensibility.Web.RequestTracking.WebRequestTrackingModule, Microsoft.ApplicationInsights.Extensibility.Web" />
</httpModules>
<customErrors mode="RemoteOnly" redirectMode="ResponseRewrite" defaultRedirect="~/500.aspx">
<error statusCode="404" redirect="~/404.aspx" />
<error statusCode="500" redirect="~/500.aspx" />
</customErrors>
</system.web>
<system.webServer>
<modules>
<remove name="FormsAuthentication" />
<remove name="ApplicationInsightsWebTracking" />
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Extensibility.Web.RequestTracking.WebRequestTrackingModule, Microsoft.ApplicationInsights.Extensibility.Web" preCondition="managedHandler" />
</modules>
<httpErrors errorMode="DetailedLocalOnly">
<remove statusCode="404" />
<error statusCode="404" path="404.html" responseMode="File" />
<remove statusCode="500" />
<error statusCode="500" path="500.html" responseMode="File" />
</httpErrors>
<validation validateIntegratedModeConfiguration="false" />
<handlers>
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<remove name="OPTIONSVerbHandler" />
<remove name="TRACEVerbHandler" />
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
</handlers>
<staticContent>
<remove fileExtension=".svg" />
<mimeMap fileExtension=".svg" mimeType="image/svg+xml" />
</staticContent>
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Net.Http.Formatting" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Data.Edm" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.6.4.0" newVersion="5.6.4.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Data.Services.Client" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.6.4.0" newVersion="5.6.4.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Data.OData" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.6.4.0" newVersion="5.6.4.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
ArticleModel.edmx
ConnectionStrings.config
<connectionStrings>
<add name="DefaultConnection" connectionString="Server=tcp:AZUREDB.database.windows.net,1433;Database=AZUREUSER_db;User ID=AZUREUSER@AZUREDB;Password=PASSWORD;Trusted_Connection=False;Encrypt=True;Connection Timeout=30" providerName="System.Data.SqlClient" />
</connectionStrings>
资源
将数据模型添加到您的项目时，它应该对您可能丢失的 web.config 进行了修改。它添加了另一个连接字符串，在您的情况下应该如下所示：
<add name="Entities"
connectionString="metadata=res://*/Models.ArticleModel.csdl|res://*/Models.ArticleModel.ssdl|res://*/Models.ArticleModel.msl;provider=System.Data.SqlClient;provider connection string="data source=Server=tcp:AZUREDB.database.windows.net,1433;Database=AZUREUSER_db;User ID=AZUREUSER@AZUREDB;Password=PASSWORD;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;""
providerName="System.Data.EntityClient" />
作为社区 Wiki 发布，因为这本身不是答案。但是，这是您需要了解的重要信息。您引用的 ASP.NET 文章已过时。最初，Entity Framework 只提供模型优先和数据库优先的方法，这两种方法都使用 EDMX。 Entity Framework 4.1 引入了代码优先作为第三种方法，它使用基于 class 的配置并避开 EDMX。它旨在替代 both 模型优先和数据库优先，前两种方法仅用于兼容性。然而，Code-First 这个名字让很多人感到困惑，导致人们认为它只是 Model-First 的替代品，而 Database-First 仍然需要与现有数据库一起使用。那是不正确的； Code-First，尽管它的名字可以与新的或现有的数据库一起使用。现在，Entity Framework 的下一版本将完全取消对模型优先和数据库优先的支持，仅保留代码优先。
您构建的任何新应用程序都应该是代码优先，否则您只是搬起石头砸自己的脚。如果您有需要使用的现有数据库，则可以使用 EF Power Tools 扩展对 Code-First POCO 进行逆向工程。我还有关于在现有数据库中使用 Code-First 的更详细指南 here.
提供错误
No connection string named 'Entities' could be found in the application config file.
说明与询问
我知道有人问过这个问题，但我发现 none 的答案对我有用，我相信这与我尝试在 Root > Areas > BlogPage 上搭建脚手架有关。也就是说，我还是后端开发的新手，所以我可能遗漏了一些非常明显的东西。
文件夹层次结构
添加新的脚手架输入值
Web.config
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=301879
-->
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<section name="JosephMCasey.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</sectionGroup>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --></configSections>
<connectionStrings>
<add name="DefaultConnection" connectionString="Server=tcp:AZUREDB.database.windows.net,1433;Database=AZUREUSER_db;User ID=AZUREUSER@AZUREDB;Password=PASSWORD;Trusted_Connection=False;Encrypt=True;Connection Timeout=30" providerName="System.Data.SqlClient" />
<!-- configSource="config\ConnectionStrings.config" -->
</connectionStrings>
<appSettings file="config\AppSettingsSecret.config">
<add key="webpages:Version" value="3.0.0.0" />
<add key="webpages:Enabled" value="false" />
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
</appSettings>
<system.web>
<authentication mode="None" />
<compilation debug="true" targetFramework="4.5.1" />
<httpRuntime targetFramework="4.5.1" />
<httpModules>
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Extensibility.Web.RequestTracking.WebRequestTrackingModule, Microsoft.ApplicationInsights.Extensibility.Web" />
</httpModules>
<customErrors mode="RemoteOnly" redirectMode="ResponseRewrite" defaultRedirect="~/500.aspx">
<error statusCode="404" redirect="~/404.aspx" />
<error statusCode="500" redirect="~/500.aspx" />
</customErrors>
</system.web>
<system.webServer>
<modules>
<remove name="FormsAuthentication" />
<remove name="ApplicationInsightsWebTracking" />
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Extensibility.Web.RequestTracking.WebRequestTrackingModule, Microsoft.ApplicationInsights.Extensibility.Web" preCondition="managedHandler" />
</modules>
<httpErrors errorMode="DetailedLocalOnly">
<remove statusCode="404" />
<error statusCode="404" path="404.html" responseMode="File" />
<remove statusCode="500" />
<error statusCode="500" path="500.html" responseMode="File" />
</httpErrors>
<validation validateIntegratedModeConfiguration="false" />
<handlers>
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<remove name="OPTIONSVerbHandler" />
<remove name="TRACEVerbHandler" />
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
</handlers>
<staticContent>
<remove fileExtension=".svg" />
<mimeMap fileExtension=".svg" mimeType="image/svg+xml" />
</staticContent>
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Net.Http.Formatting" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Data.Edm" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.6.4.0" newVersion="5.6.4.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Data.Services.Client" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.6.4.0" newVersion="5.6.4.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Data.OData" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.6.4.0" newVersion="5.6.4.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
ArticleModel.edmx
ConnectionStrings.config
<connectionStrings>
<add name="DefaultConnection" connectionString="Server=tcp:AZUREDB.database.windows.net,1433;Database=AZUREUSER_db;User ID=AZUREUSER@AZUREDB;Password=PASSWORD;Trusted_Connection=False;Encrypt=True;Connection Timeout=30" providerName="System.Data.SqlClient" />
</connectionStrings>
资源
将数据模型添加到您的项目时，它应该对您可能丢失的 web.config 进行了修改。它添加了另一个连接字符串，在您的情况下应该如下所示：
<add name="Entities"
connectionString="metadata=res://*/Models.ArticleModel.csdl|res://*/Models.ArticleModel.ssdl|res://*/Models.ArticleModel.msl;provider=System.Data.SqlClient;provider connection string="data source=Server=tcp:AZUREDB.database.windows.net,1433;Database=AZUREUSER_db;User ID=AZUREUSER@AZUREDB;Password=PASSWORD;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;""
providerName="System.Data.EntityClient" />
作为社区 Wiki 发布，因为这本身不是答案。但是，这是您需要了解的重要信息。您引用的 ASP.NET 文章已过时。最初，Entity Framework 只提供模型优先和数据库优先的方法，这两种方法都使用 EDMX。 Entity Framework 4.1 引入了代码优先作为第三种方法，它使用基于 class 的配置并避开 EDMX。它旨在替代 both 模型优先和数据库优先，前两种方法仅用于兼容性。然而，Code-First 这个名字让很多人感到困惑，导致人们认为它只是 Model-First 的替代品，而 Database-First 仍然需要与现有数据库一起使用。那是不正确的； Code-First，尽管它的名字可以与新的或现有的数据库一起使用。现在，Entity Framework 的下一版本将完全取消对模型优先和数据库优先的支持，仅保留代码优先。
您构建的任何新应用程序都应该是代码优先，否则您只是搬起石头砸自己的脚。如果您有需要使用的现有数据库，则可以使用 EF Power Tools 扩展对 Code-First POCO 进行逆向工程。我还有关于在现有数据库中使用 Code-First 的更详细指南 here.