private void load_data_to_pivot_grid() { US_DUNG_CHUNG v_us = new US_DUNG_CHUNG(); DataSet v_ds = new DataSet(); DataTable v_dt = new DataTable(); v_ds.Tables.Add(v_dt); v_ds.EnforceConstraints = false; v_us.FillDatasetTinhHinhDaoTao(v_ds, m_dat.Value); pivotGridControl1.DataSource = v_ds.Tables[0]; }