我正在尝试将新的 mvc-mini-profiler 与基于 EF4 的应用程序一起使用,但我不知道如何正确连接到目标数据源。
据我所知。
Func<IMyContainer> createContainer = () =>
{
var profiler = MiniProfiler.Current;
if (profiler != null)
{
var rootConn = // ????
var conn = ProfiledDbConnection.Get(rootConn);
return ObjectContextUtils.CreateObjectContext<MyContainer>(conn);
}
else
{
return new MyContainer();
}
};
kernel.Bind<IMyContainer>().ToMethod(ctx => createContainer()).InRequestScope();
如何在没有容器本身的情况下获得与 EF 容器的连接?我只是新建一个 SqlConnection,只不过连接字符串包含在所有 EF 垃圾中。
稍微不那么hacky的方式:
private static SqlConnection GetConnection()
{
var connStr = ConfigurationManager.ConnectionStrings["ModelContainer"].ConnectionString;
var entityConnStr = new EntityConnectionStringBuilder(connStr);
return new SqlConnection(entityConnStr.ProviderConnectionString);
}
Amendment by John Gietzen:
所有答案的组合应该适用于实体框架支持的任何后备存储。
public static DbConnection GetStoreConnection<T>() where T : System.Data.Objects.ObjectContext
{
return GetStoreConnection("name=" + typeof(T).Name);
}
public static DbConnection GetStoreConnection(string entityConnectionString)
{
// Build the initial connection string.
var builder = new EntityConnectionStringBuilder(entityConnectionString);
// If the initial connection string refers to an entry in the configuration, load that as the builder.
object configName;
if (builder.TryGetValue("name", out configName))
{
var configEntry = WebConfigurationManager.ConnectionStrings[configName.ToString()];
builder = new EntityConnectionStringBuilder(configEntry.ConnectionString);
}
// Find the proper factory for the underlying connection.
var factory = DbProviderFactories.GetFactory(builder.Provider);
// Build the new connection.
DbConnection tempConnection = null;
try
{
tempConnection = factory.CreateConnection();
tempConnection.ConnectionString = builder.ProviderConnectionString;
var connection = tempConnection;
tempConnection = null;
return connection;
}
finally
{
// If creating of the connection failed, dispose the connection.
if (tempConnection != null)
{
tempConnection.Dispose();
}
}
}
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