private void btnStat_Click(object sender, EventArgs e)
{
int viewType = cboViewType.SelectedIndex;
DateTime dateBegin = Convert.ToDateTime(dtpFrom.Value.ToString("yyyy-MM-dd") + " 00:00:00");
DateTime dateEnd = Convert.ToDateTime(dtpEnd.Value.ToString("yyyy-MM-dd") + " 23:59:59");
DataSet dsData = ReportClass.GetRegisterReport(viewType, dateBegin, dateEnd);
dgvList.AutoGenerateColumns = false;
dgvList.DataSource = dsData.Tables["TB_A"];
plGraph.Tag = dsData.Tables["TB_B"];
ShowGraph( );
}