从Datagridview到标签或最后一行

Question

我正在尝试从datagridview到datagridview的标签或最后一行 请帮我 这是我的代码

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Answer 1

public void total()
    {
        var tPrice=0;
        var tQuantity=0;
        var tAmount=0
        foreach (DataGridViewRow item in tbl_Purchase.Rows)
        {
            tPrice += (int.Parse(tbl_Purchase.Rows[item.Index].Cells[3].Value.ToString()));
            tQuantity += (int.Parse(tbl_Purchase.Rows[item.Index].Cells[4].Value.ToString()));
            tAmount += (int.Parse(tbl_Purchase.Rows[item.Index].Cells[5].Value.ToString()));    
        }
        l_Price.Text = (Convert.ToString(tPrice));
        l_Quantity.Text = (Convert.ToString(tQuantity));
        l_Amount.Text = (Convert.ToString(tAmount));
    }