Iterate through parameters in DbCommand

Question

I'm trying to intercept and log all SQL commands to the database. And I need the parameters and their values as well. But command.Parameters doesn't have an IEnumerable. I could go for a for-statement but kinda feels like a set back.

public override void ScalarExecuted(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
{
    _stopwatch.Stop();
    if (interceptionContext.Exception != null)
    {
        _logger.Error(interceptionContext.Exception, "Error executing command: {0}", command.CommandText);

        string param = string.Empty;

        if (command.Parameters.Count > 0)
        {
            foreach (var t in command.Parameters)
            {
                param += t....
            }
        }

        Log log = new Log() 
        { 
            Date = DateTime.UtcNow, 
            LogLevel = LogLevel.Error, 
            Message = command.CommandText + "\r\n " + param. 
        };
    }
    else
        _logger.TraceApi("SQL Database", "CommandInterceptor.ScalarExecuted", _stopwatch.Elapsed, "Command: {0}: ", command.CommandText);

    base.ScalarExecuted(command, interceptionContext);
}

I need to build a string (I know I should use StringBuilder in stead of string for the param, but for the question's sake want to keep it simple) so that I can pass it to the Message property of Log.

This code is slightly adjusted and taken from this blog.

Answer 1

You can make it a List...

StringBuilder sb = new StringBuilder();

command.Parameters.Cast<DbParameter>()
                  .ToList()
                  .ForEach(p => sb.Append(
                                   string.Format("{0} = {1}{2}",
                                      p.ParameterName,
                                      p.Value,
                                      Environment.NewLine)));

Console.WriteLine(sb.ToString());