private void Jisuan() { double flSum = 0; double mlpj = 0; //for (int i = 0; i < dataGridView1.Rows.Count; i++) //{ // if (dataGridView1.Rows[i].Cells[6].Value != null) // { // } //} for (int i = 0; i < dataGridView2.Rows.Count; i++) { if (dataGridView2.Rows[i].Cells[6].Value != null && dataGridView2.Rows[i].Cells[12].Value != null && cal.IsNumber(dataGridView2.Rows[i].Cells[12].Value.ToString())) { flSum = flSum + Convert.ToDouble(dataGridView2.Rows[i].Cells[12].Value); } } FL_Sum.Text = "辅料总和:" + flSum.ToString(); }