我正在尝试将API和DataAccessLayer分开，但是我无法使用EF 6代码优先方法来创建数据库。
根据下面的结构和设置，将在localdb空间中创建一个数据库，但不会在我的计算机上的SQL Server Express实例中创建一个数据库。我想念什么或做错了什么？
项目结构：
API ( WebApi )
- Controller
- App.config ( from shared lib )
- Web.config
DataAccessLayer ( Shared Library .NET Framework 461)
- Models
- DBContext
- Migrations
- web.config
Tests
API
Web.config
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
https://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" />
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
</configSections>
<appSettings>
<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>
<compilation debug="true" targetFramework="4.6.1" />
<httpRuntime targetFramework="4.6.1" />
</system.web>
<system.webServer>
<modules>
<remove name="TelemetryCorrelationHttpModule" />
<add name="TelemetryCorrelationHttpModule" type="Microsoft.AspNet.TelemetryCorrelation.TelemetryCorrelationHttpModule, Microsoft.AspNet.TelemetryCorrelation" preCondition="integratedMode,managedHandler" />
</modules>
<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>
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" />
<bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Diagnostics.DiagnosticSource" publicKeyToken="cc7b13ffcd2ddd51" />
<bindingRedirect oldVersion="0.0.0.0-4.0.2.1" newVersion="4.0.2.1" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
<bindingRedirect oldVersion="0.0.0.0-11.0.0.0" newVersion="11.0.0.0" />
</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="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="1.0.0.0-5.2.4.0" newVersion="5.2.4.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
<system.codedom>
<compilers>
<compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701" />
<compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:41008 /define:_MYTYPE=\"Web\" /optionInfer+" />
</compilers>
</system.codedom>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
参考添加了DataAccessLayer.dll
控制器
[HttpGet]
public List<DataAccessLayer.Models.Customer> Get()
{
var model = new List<DataAccessLayer.Models.Customer>();
using(var context = new DataAccessLayer.Models.DatabaseContext.CustomerTransactionContext())
{
model = context.Customers.ToList();
}
return model;
}
DataAccessLayer
DatabaseContext
public class CustomerTransactionContext : DbContext
{
public CustomerTransactionContext() : base("CustomerTransactionContext")
{
Database.SetInitializer(new CreateDatabaseIfNotExists<CustomerTransactionContext>());
}
public DbSet<Customer> Customers { get; set; }
public DbSet<Transaction> Transactions { get; set; }
public DbSet<CurrencyCode> CurrencyCodes { get; set; }
public DbSet<TransactionStatus> TransactionStatuses { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}
}
App.config -这是连接字符串部分
<connectionStrings>
<add name="CustomerTransactionContext"
connectionString="Data Source=DESKTOP-6ERMBUH\SQLEXPRESS01;initial catalog=CustomerTransactionContext;Integrated Security=true"
providerName="System.Data.SqlClient"/>
</connectionStrings>
迁移 配置
internal sealed class Configuration : DbMigrationsConfiguration<Models.DatabaseContext.CustomerTransactionContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = true;
}
protected override void Seed(Models.DatabaseContext.CustomerTransactionContext context)
{
// This method will be called after migrating to the latest version.
// You can use the DbSet<T>.AddOrUpdate() helper extension method
// to avoid creating duplicate seed data.
context.Customers.AddOrUpdate(c => c.CustomerID,
new Customer { ContactEmail = "", CustomerName = "Jonathan", MobileNo = 0123456789, CustomerID = 1 },
new Customer { ContactEmail = "", CustomerName = "Mary", MobileNo = 424356909, CustomerID = 2 },
new Customer { ContactEmail = "", CustomerName = "Ali", MobileNo = 612456749, CustomerID = 3 },
new Customer { ContactEmail = "", CustomerName = "Bob", MobileNo = 716356789, CustomerID = 4 },
new Customer { ContactEmail = "", CustomerName = "Lucy", MobileNo = 313453789, CustomerID = 5 },
new Customer { ContactEmail = "", CustomerName = "Edwardo", MobileNo = 242346760, CustomerID = 6 }
);
context.TransactionStatuses.AddOrUpdate(ts => ts.TransactionStatusID,
new TransactionStatus { Name = "Success", TransactionStatusID = 1 },
new TransactionStatus { Name = "Failed", TransactionStatusID = 2 },
new TransactionStatus { Name = "Canceled", TransactionStatusID = 3 });
context.CurrencyCodes.AddOrUpdate(cc => cc.CurrencyCodeID,
new CurrencyCode { Name = "USD", CurrencyCodeID = 1 },
new CurrencyCode { Name = "JPY", CurrencyCodeID = 2 },
new CurrencyCode { Name = "THB", CurrencyCodeID = 3 },
new CurrencyCode { Name = "SGD", CurrencyCodeID = 4 });
context.Transactions.AddOrUpdate(t => t.TransactionID,
new Transaction { TransactionStatusID = 1, Amount = 29.99M, CurrencyCodeID = 1, TransactionDateTime = DateTime.Now, CustomerID = 1 },
new Transaction { TransactionStatusID = 2, Amount = 9.99M, CurrencyCodeID = 3, TransactionDateTime = DateTime.Now, CustomerID = 1 },
new Transaction { TransactionStatusID = 3, Amount = 1.32M, CurrencyCodeID = 1, TransactionDateTime = DateTime.Now, CustomerID = 1 },
new Transaction { TransactionStatusID = 3, Amount = 1.32M, CurrencyCodeID = 1, TransactionDateTime = DateTime.Now, CustomerID = 1 },
new Transaction { TransactionStatusID = 3, Amount = 1.32M, CurrencyCodeID = 1, TransactionDateTime = DateTime.Now, CustomerID = 1 });
}
}
答案 0 :(得分：1)
在Web.config中查看以下几行：
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
您的连接工厂设置为mssqllocaldb，这就是使用本地数据库创建数据库的原因。修复您的连接字符串以使用您的SQL实例名称，或者只是删除此代码以使App.config设置起作用。
答案 1 :(得分：0)
这是在dbcontext类中描述您的连接字符串的好方法，例如
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
optionsBuilder.UseSqlServer(@"Server=Servername;Database=Dbname;User ID=sa;Password=1234qqqQ;TrustServerCertificate=True;Trusted_Connection=False;Connection Timeout=30;Integrated Security=False;Persist Security Info=False;Encrypt=True;MultipleActiveResultSets=True;");
}
}
这使您能够将迁移添加到数据库中。其次，您的应用程序应该知道它将进入哪个数据库。在.net core中，添加以下代码startup.cs
var connection = @"Server=Servername;Database=Dbname;User ID=sa;Password=1234qqqQ;TrustServerCertificate=True;Trusted_Connection=False;Connection Timeout=30;Integrated Security=False;Persist Security Info=False;Encrypt=True;MultipleActiveResultSets=True;";
services.AddDbContext<BeautyCenterContext>(options => options.UseSqlServer(connection));
在pm中添加迁移时，不要忘记将默认项目更改为包含上下文类的项目。希望这会有所帮助。