计算 2 个 datagridview 列必须是相同的行数

Question

我有 2 个数据网格视图，一个用于购买，一个用于销售

我将销售总额相加并从中减去购买总额。

问题是，它只会在两个 datagridviews 的行数相同的情况下进行计算，如果其中一个的行数比另一个多，它不会在应该显示的文本框中给出任何值结果

这是我的代码

private void GrossSale()
{
    int sum = 0;
    for (int i = 0; i < dataGridView1.Rows.Count; ++i)
    {
        sum += Convert.ToInt32(dataGridView1.Rows[i].Cells[2].Value);
    }
    txtGrossSale.Text = sum.ToString();
}
private void NetSale()
{
    int sum2 = 0;
    for (int i = 0; i < dataGridView1.Rows.Count; ++i)
    {
        sum2 += Convert.ToInt32(dataGridView1.Rows[i].Cells[3].Value);
    }
    txtNetSale.Text = sum2.ToString();
}
private void GrossPurchase()
{
    int sum3 = 0;
    for (int i = 0; i < dataGridView2.Rows.Count; ++i)
    {
        sum3 += Convert.ToInt32(dataGridView2.Rows[i].Cells[2].Value);
    }
    txtGrossPurchase.Text = sum3.ToString();
}
private void NetPurchase()
{
    int sum4 = 0;
    for (int i = 0; i < dataGridView2.Rows.Count; ++i)
    {
        sum4 += Convert.ToInt32(dataGridView2.Rows[i].Cells[3].Value);
    }
    txtNetPurchase.Text = sum4.ToString();
}
private void TotalGross()
{
    int sum5 = 0;
    int sum6 = 0;
    int sum7 = 0;
    for (int i = 0; i < dataGridView2.Rows.Count; ++i)
    {
        sum5 += Convert.ToInt32(dataGridView1.Rows[i].Cells[3].Value);
        sum6 += Convert.ToInt32(dataGridView2.Rows[i].Cells[3].Value);
    }
    sum7 = sum5 + sum6;
    txtGross.Text = sum7.ToString();
}

Answer 1

看看 TotalGross()。您正在循环 dataGridView2.Rows.Count，但正在循环内同时访问 dataGridView1.Rows[i] 和 dataGridView2.Rows[i]...