我有一个简单的控制台应用程序与EF6,我的电脑有localdb v13,当我尝试连接到EF数据库时,我收到此错误
{"Cannot open database \"NinjaDomain.DataModel.NinjaContext\" requested by the login. The login failed.\r\nLogin failed for user 'xx\\xx.yy'."}
这是app.config
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<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>
答案 0 :(得分:1)
控制台应用程序可能还有一个App.config无关紧要,通常情况下,如果您已经从Package Manager控制台安装了EF,那就是:
install-package entityframework
app.config将自动添加到您的项目文件中。
这是默认的连接字符串,如果没有app.config(与EF v 6.1.3相关)
"Data Source=(localdb)\\mssqllocaldb;Initial Catalog=MyConsoleApplication.Program+MyDbContext;Integrated Security=True;MultipleActiveResultSets=True"
下面,我更改了app.config(如果你没有,你可以将它添加到你的项目中)并且我已经提供了连接字符串
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
</startup>
<connectionStrings>
<add name="DatabaseConnectionString"
connectionString="Integrated Security=SSPI; Initial Catalog=UsersDatabase5; Data Source=.\;" providerName="System.Data.SqlClient" />
</connectionStrings>
<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>
您应该使用&#39; name&#39;将连接字符串传递给DbContext构造函数。这样的关键字:
using (var myDbContext = new MyDbContext("name=" + "DatabaseConnectionString"))
{
....
我在app.config示例中使用了普通的SQL Server:
Data Source=.\;
你可以改变它:
Data Source=(localdb)\\mssqllocaldb;
或者只检查您的SQL Server实例名称(使用SSM或命令行)。