Question

我想用相同的id ...

计算datagridview中的列值

我写了以下代码...... 但它存储datagridview中的各个行......

private void AddStockTable()
{
        try
        {
            Sqlcon = objDB.DBConnection();
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                Query = "insert into tblStock (PurchaseId, CurDate,JewelID, Purity, Weight, Quantity, SupplierId,G916,G22ct,G90,Silver) values " +
                    " ('" + txtPurchaseId.Text + "','" + dateTimePicker1.Text + "','" + dataGridView1[0, i].Value.ToString() + "','" + dataGridView1[2, i].Value.ToString() + "' " +
                    ", '" + lblTotalWeight.Text + "','" + lblQuantity.Text + "','" + lblSupplier.Text + "','" + lbl916.Text + "','" + lbl22.Text + "','" + lbl90.Text + "','" + lblSilver.Text + "') ";

                Sqlcmd = new SqlCommand(Query, Sqlcon);
                Sqlcmd.ExecuteNonQuery();    
            }
        }
        catch (Exception ex)
        { 
             MessageBox.Show(ex.ToString()); 
        }
}

我想将值存储在数据库中，如下面的输出

ID QUANTITY J0001 4 J0002 9

请支持我......

Answer 1

我不确定所发布的代码是什么。但是，您可以使用Dictionary string为“JewelID”和int来保存数量总和，这可以通过一种简单的方法对所描述的总数求和。循环遍历DataGridView中的行，并从“JewelID”列和“数量”列中获取值，并将其添加到Dictionary。

如果已存在“JewelID”在字典中，则将“数量”值添加到当前存在的值，以获得该“JewelID”的“数量”的运行总计。在代码遍历所有行之后，Dictionary将输出到表单上的多行文本框。

private void btnUpdateIDQty_Click(object sender, EventArgs e) {
  Dictionary<string, int> IDCount = new Dictionary<string, int>();
  string curId = "";
  int curQty = 0;
  int oldValue;
  foreach (DataGridViewRow row in dgvPurchaseOrder.Rows) {
    if (row.Cells["JewelID"].Value != null && row.Cells["Quantity"].Value != null) {
      curId = row.Cells["JewelID"].Value.ToString();
      int.TryParse(row.Cells["Quantity"].Value.ToString(), out curQty);
      if (IDCount.ContainsKey(curId)) {
        IDCount.TryGetValue(curId, out oldValue);
        curQty += oldValue;
        IDCount[curId] = curQty;
      }
      else {
        IDCount.Add(curId, curQty);
      }
    }
    else {
      // one of the cells is null ignore
    }
  }

  StringBuilder sb = new StringBuilder();
  sb.Append("ID quantity totals" + Environment.NewLine);
  foreach (KeyValuePair<string, int> pair in IDCount) {
    sb.Append("JewelryID: " + pair.Key + " Total Qty: " + pair.Value + Environment.NewLine);
  }
  txtIDQuantity.Text = sb.ToString();
}

如何在datagridview中对具有相同id的列值求和

1 个答案: