///--------------------------------------------------------------------------------------------------------------------------
/// <summary>
/// Start() 함수를 호출한 시각부터 흐른 시간을 반환해주는 function.
/// </summary>
/// <param name="timeUnit">반환할 시간의 단위.</param>
/// <param name="resetTimer">진행된 시간을 반환함과 동시에 타임를 리셋할 것인가를 나타낸다. 만약 타이머를 리셋하면
/// 다음번 이 함수를 호출할 때에는 이 함수를 호출한 시점부터 진행된 시간을 반환하게 된다.</param>
/// <returns>진행된 시간을 반환한다.</returns>
public long GetElapsedTime(TIME_UNIT timeUnit, bool resetTimer)
{
// 현재 카운터 값 구하기.
long currentCount;
QueryPerformanceCounter(out currentCount);
// 진행된 시간을 초 단위로 구하기.
double elapsedTime = (currentCount - startCount) / (double)frequency;
// 타이머를 리셋하도록 한 경우.
if (resetTimer)
{
startCount = currentCount;
}
// 진행된 시간 반환.
switch (timeUnit)
{
case TIME_UNIT.SECOND: return((long)(elapsedTime * 1));
case TIME_UNIT.MILLISECOND: return((long)(elapsedTime * 1000));
case TIME_UNIT.MICROSECOND: return((long)(elapsedTime * 1000000));
case TIME_UNIT.NANOSECOND: return((long)(elapsedTime * 1000000000));
}
return(0);
}
public static DataSet Query(uint siteNum, uint sensorNum, DateTime begin, DateTime end, TIME_UNIT unit, bool isSum)
{
MySqlConnection connection = new MySqlConnection();
try
{
connection.ConnectionString = GetString();
connection.Open();
string sqlFormat = "";
switch (unit)
{
case TIME_UNIT.SECOND:
sqlFormat = "SELECT num_site as site,num_sensor as sensor,{4} as data,time_create as time FROM datas WHERE time_create>= '{0}' AND time_create <='{1}' AND num_sensor = {2} AND num_site ={3} order by time_create desc limit 4000";
break;
case TIME_UNIT.MIN:
sqlFormat = "SELECT num_site as site,num_sensor as sensor,{4} as data,time_create as time FROM datas_min WHERE time_create>= '{0}' AND time_create <='{1}' AND num_sensor = {2} AND num_site ={3} order by time_create desc limit 4000";
break;
case TIME_UNIT.HOUR:
sqlFormat = "SELECT num_site as site,num_sensor as sensor,{4} as data,time_create as time FROM datas_hour WHERE time_create>= '{0}' AND time_create <='{1}' AND num_sensor = {2} AND num_site ={3} order by time_create desc limit 4000";
break;
case TIME_UNIT.DAY:
sqlFormat = "SELECT num_site as site,num_sensor as sensor,{4} as data,time_create as time FROM datas_day WHERE time_create>= '{0}' AND time_create <='{1}' AND num_sensor = {2} AND num_site ={3} order by time_create desc limit 4000";
break;
case TIME_UNIT.MONTH:
sqlFormat = "SELECT num_site as site,num_sensor as sensor,{4} as data,time_create as time FROM datas_month WHERE time_create>= '{0}' AND time_create <='{1}' AND num_sensor = {2} AND num_site ={3} order by time_create desc limit 4000";
break;
default:
break;
}
string dataCol = "data";
if (unit != TIME_UNIT.SECOND)
{
if (isSum)
{
dataCol = "data_sum";
}
else
{
dataCol = "data_avg";
}
}
MySqlCommand cmd = connection.CreateCommand();
cmd.CommandText = String.Format(sqlFormat,
begin.ToString("yyyy-MM-dd HH:mm:ss"),
end.ToString("yyyy-MM-dd HH:mm:ss"),
sensorNum,
siteNum,
dataCol);
cmd.CommandType = CommandType.Text;
//MySqlDataReader msd = cmd.ExecuteReader();
MySqlDataAdapter msda = new MySqlDataAdapter(cmd);
DataSet ret = new DataSet();
msda.Fill(ret);
return(ret);
}
catch (System.Exception ex)
{
MessageBox.Show(ex.Message);
return(null);
}
finally
{
connection.Close();
}
// if (ShuiwenDbContext == null)
// {
// ShuiwenDbContext = new ORDesignerDataContext(DbConnectString.GetString());
// }
// var ret = ShuiwenDbContext.datas.Where(d => d.num_site == siteNum &&
// d.num_sensor == sensorNum &&
// d.time >= begin &&
// d.time <= end);
// return ret
}