/// <summary>
///
/// </summary>
/// <param name="begin"></param>
/// <param name="end"></param>
private void Query(DateTime begin, DateTime end)
{
// create year result data table
//
DataTable resultTable = CreateResultDataTable();
//this.SelectedStationCollection.GetWL1DataTable(
foreach (StationClass st in this.SelectedStationCollection)
{
DeviceClass d = st.DeviceCollection[0];
double usedAmount = d.CalcUsedAmount(begin, end);
// insert result row to year table
//
CreateAndAddRow(resultTable, st.StationName, begin, end, (int)usedAmount);
}
// bind result result data table to chart
//
BindDataToChart(resultTable);
BindDataToGridView(resultTable);
}