在数据网格视图中添加

Question

Currently what I had so far：

我试图获取数据，一旦用户键进入数据网格视图，它将自动添加data1和数据2并显示总数但它不起作用这里是我的代码到目前为止我设法让他们添加使用添加按钮

      private void dataGridView1_CellStyleContentChanged(object sender, DataGridViewCellStyleContentChangedEventArgs e)
    {
        try
        {
            var a = Convert.ToDouble(dataGridView1.Rows[1].Cells[0].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[0].Value);
            dataGridView1.Rows[3].Cells[0].Value = a;

            var b = Convert.ToDouble(dataGridView1.Rows[1].Cells[1].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[1].Value);
            dataGridView1.Rows[3].Cells[1].Value = b;

            var c = Convert.ToDouble(dataGridView1.Rows[1].Cells[2].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[2].Value);
            dataGridView1.Rows[3].Cells[2].Value = c;

            var d = Convert.ToDouble(dataGridView1.Rows[1].Cells[3].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[3].Value);
            dataGridView1.Rows[3].Cells[3].Value = d;

            var f = Convert.ToDouble(dataGridView1.Rows[1].Cells[4].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[4].Value);
            dataGridView1.Rows[3].Cells[4].Value = f;

            var g = Convert.ToDouble(dataGridView1.Rows[1].Cells[5].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[5].Value);
            dataGridView1.Rows[3].Cells[5].Value = g;

            var h = Convert.ToDouble(dataGridView1.Rows[1].Cells[6].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[6].Value);
            dataGridView1.Rows[3].Cells[6].Value = h;

            var i = Convert.ToDouble(dataGridView1.Rows[1].Cells[7].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[7].Value);
            dataGridView1.Rows[3].Cells[7].Value = i;

            var j = Convert.ToDouble(dataGridView1.Rows[1].Cells[8].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[8].Value);
            dataGridView1.Rows[3].Cells[8].Value = j;

            var k = Convert.ToDouble(dataGridView1.Rows[1].Cells[9].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[9].Value);
            dataGridView1.Rows[3].Cells[9].Value = k;

            var l = Convert.ToDouble(dataGridView1.Rows[1].Cells[10].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[10].Value);
            dataGridView1.Rows[3].Cells[10].Value = l;

            var n = Convert.ToDouble(dataGridView1.Rows[1].Cells[11].Value) + Convert.ToDouble(dataGridView1.Rows[2].Cells[11].Value);
            dataGridView1.Rows[3].Cells[11].Value = n;
        }

        catch
        {
            MessageBox.Show("Never run");
        } 
    }