实体框架v4仅代码连接字符串

Question

我最近开始使用EF v4 Code Only库来处理我正在进行的一些项目.但是,我遇到了一些障碍.我似乎无法弄清楚连接字符串的正确格式.我使用以下代码来构建连接字符串:

string connectionString = new EntityConnectionStringBuilder
{
    Provider = "System.Data.SqlClient",
    ProviderConnectionString = new SqlConnectionStringBuilder
    {
        DataSource = "localhost",
        InitialCatalog = "ASM_Testing",
        IntegratedSecurity = true,
        Pooling = false
    }.ConnectionString
}.ConnectionString;

但是,使用它会导致以下错误:

Specifications_for_EntityContext.When_logging_in_application_with_valid_app_role_and_password.Login_should_be_successful : System.ArgumentException : Some required information is missing from the connection string. The 'metadata' keyword is always required.
Stack Trace:
   at System.Data.EntityClient.EntityConnection.ValidateValueForTheKeyword(DbConnectionOptions effectiveConnectionOptions, String keywordName)
   at System.Data.EntityClient.EntityConnection.ChangeConnectionString(String newConnectionString)
   at System.Data.Objects.ObjectContext..ctor(String connectionString)
   at ASM.Data.EntityContext..ctor(String connectionString) in C:\Users\Jon Rista\TFS\Advanced Service Management\Trunk\Main\Source\ASM.Data\EntityContext.cs:line 16
   at Specifications_for_EntityContext.Behaves_like_EntityContext_connected_to_a_database.TestableEntityContext..ctor(String connectionString) in C:\Users\Jon Rista\TFS\Advanced Service Management\Trunk\Main\Source\Tests.ASM.Data\EntityContextFacts.cs:line 165
   at Specifications_for_EntityContext.Behaves_like_EntityContext_connected_to_a_database.InitializeContext() in C:\Users\Jon Rista\TFS\Advanced Service Management\Trunk\Main\Source\Tests.ASM.Data\EntityContextFacts.cs`e`enter code here`nter code here`:line 160
   at ASM.Testing.xUnit.ObservationCommand.Execute(Object testClass) in C:\Users\Jon Rista\TFS\Advanced Service Management\Trunk\Main\Source\ASM.Testing.xUnit\ObservationCommand.cs:line 24
   at Xunit.Sdk.FixtureCommand.Execute(Object testClass)
   at Xunit.Sdk.BeforeAfterCommand.Execute(Object testClass)
   at Xunit.Sdk.LifetimeCommand.Execute(Object testClass)
   at Xunit.Sdk.TimedCommand.Execute(Object testClass)
   at Xunit.Sdk.ExceptionAndOutputCaptureCommand.Execute(Object testClass)

因为我没有任何元数据...因为我使用的是Code Only,所以我有点束缚.非常感谢任何见解.

构建器类生成的连接字符串如下:

provider = System.Data.SqlClient; provider connection string ="Data Source = localhost; Initial Catalog = ASM_Testing; Integrated Security = True; Pooling = False"

---

工作实例(基于已接受的答案)

有必要使用ContextBuilder创建使用仅代码模式的上下文的任何实例.对于那些正在寻找同一问题答案的人来说,这是一个有效的例子:

protected override void InitializeContext()
{
    string connectionString = new SqlConnectionStringBuilder
    {
        DataSource = "localhost",
        InitialCatalog = "Testing",
        IntegratedSecurity = true,
        Pooling = false
    }.ConnectionString;

    var connection = new SqlConnection(connectionString);
    var builder = new ContextBuilder<TestableEntityContext>();
    m_context = builder.Create(connection);
}

Answer 1

使用方法：

var builder = new ContextBuilder<YourContext>();

using (YourContext context = builder.Create(new SqlConnection(ConfigurationManager.ConnectionStrings["yourConenctionKeyInWebConfig"].ConnectionString)))
{
     ...
}