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实体框架v4纯代码连接字符串

code-first entity-framework-4 c#

jrista · 技术社区 · 14 年前

我最近已经开始使用efv4代码库的一些项目,我正在工作。然而,我遇到了一个小麻烦。我似乎想不出连接字符串的正确格式。我已使用以下代码构建连接字符串:

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)

生成器类生成的连接字符串如下所示:

连接字符串=“数据源=本地主机;首字母目录=ASM\U测试;综合

工作示例(基于公认的答案)

必须使用ContextBuilder来创建使用纯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,下面是一个工作示例:

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);
}

2 回复 | 直到 14 年前

Gregoire 14 年前

要使用它:

var builder = new ContextBuilder<YourContext>();

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

Yury Tarabanko 14 年前

ContextBuilder

定义ctor取数 EntityConnection EntityContext 班

{ }
var factory=DbProviderFactories.GetFactory(“System.Data.SqlClient”); connection.ConnectionString=提供程序连接字符串;
上下文生成器

var contextBuilder=新建contextBuilder(); contextBuilder.Configurations.Add(…)