Ето регистратора, който обикновено използвам за EF.
public class EFLoggerForTesting : IDbCommandInterceptor
{
static readonly ConcurrentDictionary<DbCommand, DateTime> m_StartTime = new ConcurrentDictionary<DbCommand, DateTime>();
public void ReaderExecuted(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
{
Log(command, interceptionContext);
}
public void NonQueryExecuted(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
{
Log(command, interceptionContext);
}
public void ScalarExecuted(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
{
Log(command, interceptionContext);
}
private static void Log<T>(DbCommand command, DbCommandInterceptionContext<T> interceptionContext)
{
DateTime startTime;
TimeSpan duration;
if (m_StartTime.TryRemove(command, out startTime))
{
duration = DateTime.Now - startTime;
}
else
duration = TimeSpan.Zero;
var requestId =-1;
string message;
var parameters = new StringBuilder();
foreach (DbParameter param in command.Parameters)
{
parameters.AppendLine(param.ParameterName + " " + param.DbType + " = " + param.Value);
}
if (interceptionContext.Exception == null)
{
message = string.Format("Database call took {0} sec. RequestId {1} \r\nCommand:\r\n{2}", duration.TotalSeconds.ToString("N3"), requestId, parameters.ToString() + command.CommandText);
}
else
{
message = string.Format("EF Database call failed after {0} sec. RequestId {1} \r\nCommand:\r\n{2}\r\nError:{3} ", duration.TotalSeconds.ToString("N3"), requestId, parameters.ToString() + command.CommandText, interceptionContext.Exception);
}
Debug.WriteLine(message);
}
public void NonQueryExecuting(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
{
OnStart(command);
}
public void ReaderExecuting(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
{
OnStart(command);
}
public void ScalarExecuting(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
{
OnStart(command);
}
private static void OnStart(DbCommand command)
{
m_StartTime.TryAdd(command, DateTime.Now);
}
}
За съжаление документацията не съществува, така че не знам дали това ще работи за вашия сценарий.