C# 更改Datagridview中的数量值时，价格也会更改。怎么可能？哪个事件将执行此操作。CellEndEdit已使用

我想在Datagridview中更改数量值，它也会更改价格。这怎么可能？使用其他cellproductname已使用的C windows form.CellEndEdit时，它将发生哪个事件

private void dataGridViewSalesForm_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    try
    {
        string MatchingProduct = dataGridViewSalesForm.Rows[0].Cells[1].Value.ToString();

        for (int i = 0; i < objArrayList.Count; i++)
        {
            if (objArrayList[i].ToString().ToLower().StartsWith(MatchingProduct.ToLower()))
            {
                dataGridViewSalesForm.Rows[0].Cells[1].Value = objArrayList[i].ToString();
                break;
            }
        }
    }
    catch (Exception ex)
    {

        MessageBox.Show(ex.Message);
    }
    /*connection for loading brandname from brandtable*/
    string get_strProductName = dataGridViewSalesForm.Rows[0].Cells[1].Value.ToString();
    string quantity = "1";
    SqlConnection conn = new SqlConnection(connstr);
    try
    {
        conn.Open();
        string qry = "SELECT T_Inv_Brands.brand_name FROM T_Inv_Products INNER JOIN T_Inv_Brands ON T_Inv_Products.brand_id = T_Inv_Brands.brand_id WHERE     T_Inv_Products.prod_name ='" + get_strProductName + "'";
        SqlCommand cmd = new SqlCommand(qry, conn);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);

        dataGridViewSalesForm.Rows[0].Cells[2].Value = ds.Tables[0].Rows[0]["brand_name"].ToString();
        dataGridViewSalesForm.Rows[0].Cells[3].Value = quantity;
        conn.Close();

    }
    catch (Exception ex)
    {

        MessageBox.Show(ex.Message);

    }


    /*connection for loading retailprice  from producttable*/
    SqlConnection connection = new SqlConnection(connstr);
    try
    {
        conn.Open();
        string qry = "SELECT  retailprice FROM  T_Inv_Products WHERE prod_name = '" + get_strProductName + "'";
        SqlCommand cmd = new SqlCommand(qry, connection);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        da.Fill(dt);
        dataGridViewSalesForm.Rows[0].Cells[4].Value = Convert.ToDouble(dt.Rows[0]["retailprice"].ToString());




    }
    catch (Exception ex)
    {

        MessageBox.Show(ex.Message);

    }

    //double quantityload = Convert.ToDouble(dataGridViewSalesForm.Rows[0].Cells[3].Value.ToString());
    //double pricefetch = Convert.ToDouble(dataGridViewSalesForm.Rows[0].Cells[4].Value.ToString());
    //double result = quantityload * pricefetch;
    //dataGridViewSalesForm.Rows[0].Cells[4].Value = result.ToString();
}

---

您似乎认为只能对一个单元格或列使用事件。相反，您需要以这样一种方式对事件进行编码：所有必要的单元格和/或列都有自己的逻辑

它有助于将代码划分成更小的部分，并使用有用的名称记录它们所包含的逻辑

下面是一个具有两个分支的示例，一个用于特定单元格，另一个用于特定列。我传递DataGridViewCellEventArgs，以便函数可以像实际事件一样访问DataGridView DGV。。当然，您可以根据需要对其进行扩展：

int quantityColumnIndex = 3;  // use your own numbers..
int currencyColumnIndex = 1;  // ..and names!!
int currencyRowIndex = 0;
int pricePerUnitColumnIndex = 7;
int totalPriceColumnIndex = 8;
int totalBasePriceColumnIndex = 4;

private void DGV_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    if (e.ColumnIndex == quantityColumnIndex) doPriceCalc(e);
    else if (e.ColumnIndex == currencyColumnIndex && e.RowIndex == currencyRowIndex) 
         doAllCalc(e);

}

void doPriceCalc(DataGridViewCellEventArgs e)
{
    // 1st example
    DGV[totalPriceColumnIndex, e.RowIndex].Value =
        (int)DGV[quantityColumnIndex, e.RowIndex].Value *
        (decimal)DGV[pricePerUnitColumnIndex, e.RowIndex].Value;

}

void doAllCalc(DataGridViewCellEventArgs e)
{
    // 2nd example
    decimal currency = (decimal) DGV[currencyColumnIndex,currencyRowIndex ].Value;
    for (int row = 0; row < DGV.Rows.Count; row++)
        DGV[pricePerUnitColumnIndex, e.RowIndex].Value =
            (decimal)DGV[totalBasePriceColumnIndex, e.RowIndex].Value * currency;
}

---

请注意，我已通过列的索引为这些列编制了索引。您也可以按他们的名字为他们编制索引，例如：DGV[PricePerUnit，e.rowIndex]

请在这个问题上帮助我Soner gönül