我正在尝试将新的mvc-mini-profiler与我的基于EF4的应用程序一起使用,但我不知道如何正确获取与目标数据源的连接。
据我所知,这是。
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();
如果没有contianer本身,如何连接到EF容器?我只是新建一个SqlConnection,除了连接字符串包装在所有EF垃圾中。
答案 0 :(得分:4)
稍微不那么狡猾的方式:
private static SqlConnection GetConnection()
{
var connStr = ConfigurationManager.ConnectionStrings["ModelContainer"].ConnectionString;
var entityConnStr = new EntityConnectionStringBuilder(connStr);
return new SqlConnection(entityConnStr.ProviderConnectionString);
}
<小时/> John Gietzen的修正案:
所有答案的这种组合应该适用于Entity Framework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();
}
}
}
答案 1 :(得分:2)
这是一个稍微好一点,但稍微有点讨厌的解决方案来获得商店连接。
public static DbConnection GetStoreConnection<T>() where T : System.Data.Objects.ObjectContext
{
return GetStoreConnection("name=" + typeof(T).Name);
}
public static DbConnection GetStoreConnection(string entityConnectionString)
{
DbConnection storeConnection;
// Let entity framework do the heavy-lifting to create the connection.
using (var connection = new EntityConnection(entityConnectionString))
{
// Steal the connection that EF created.
storeConnection = connection.StoreConnection;
// Make EF forget about the connection that we stole (HACK!)
connection.GetType().GetField("_storeConnection",
BindingFlags.NonPublic | BindingFlags.Instance).SetValue(connection, null);
// Return our shiny, new connection.
return storeConnection;
}
}
答案 2 :(得分:1)
您必须直接初始化连接,如下:
var rootConn = new System.Data.SqlClient.SqlConnection(your_connection_string_minus_your_ef_junk);