private void btnRefresh_Click(object sender, EventArgs e) { StockOutWorkQueryDialog frm = new StockOutWorkQueryDialog(); if (frm.ShowDialog() == DialogResult.OK) { string strWhere = frm.strWhere; Process.Dal.BillDal dal = new Process.Dal.BillDal(); DataTable dt = dal.GetBillOutTask(strWhere); this.dgvMain.DataSource = dt; } }