Dobavit row DataTable

var row = dt.NewRow();
row["MonthAmt"] = Math.Round(Convert.ToDouble(dt.Compute("Sum(MonthAmt)", string.Empty)), 0).ToString();
row["PercentAmt"] = Math.Round(Convert.ToDouble(dt.Compute("Sum(PercentAmt)", string.Empty)), 0).ToString();
row["PrincipalAmt"] = Math.Round(Convert.ToDouble(dt.Compute("Sum(PrincipalAmt)", string.Empty)), 0).ToString();
dt.Rows.Add(row);


dgView.DataSource = dt;