循环遍历datagridview和同一个id的总量

Question

我正在尝试获取每个 ID 在每个日期的总金额。

示例数据：

ID                  Date        Amount
619|RENE ABERIA     2017-01-03  418.80
619|RENE ABERIA     2017-01-03  497.48
619|RENE ABERIA     2017-01-03  29.13
620|JAMES APRECIO   2017-01-03  460.70
620|JAMES APRECIO   2017-01-03  76.33
620|JAMES APRECIO   2017-01-04  460.70
620|JAMES APRECIO   2017-01-04  59.32
620|JAMES APRECIO   2017-01-06  460.70

这一切都在一个数据网格视图中，并且有很多行。对于“2017-01-03”上的“619”，我有 3 个不同的金额，例如418.80、497.48 和 29.13。我想合计这个金额并将其放在最后一个条目的下方，如下所示。

ID                  Date        Amount
619|RENE ABERIA     2017-01-03  418.80
619|RENE ABERIA     2017-01-03  497.48
619|RENE ABERIA     2017-01-03  29.13
                    Total:      945.41
620|JAMES APRECIO   2017-01-03  460.70
620|JAMES APRECIO   2017-01-03  76.33
                    Total:      537.03
620|JAMES APRECIO   2017-01-04  460.70
620|JAMES APRECIO   2017-01-04  59.32
                    Total:      520.02
620|JAMES APRECIO   2017-01-06  460.70
                    Total:      460.70

我想我必须使用 FOR LOOP 才能转到每一行，但我不知道如何去做或继续。以下是我目前所拥有的，显然，要完成它还有很长的路要走。

 private void GetTotalShareForDay()
        {
        string laborerOrig = null;
        string laborerCopy = null;
        string dateOrig = null;
        string dateCopy = null;

        var share = 0.0;

        for (var i = 0; i < dgvSummary.Rows.Count; i++)
        {
            if (i == 0)
            {
                laborerOrig = dgvSummary.Rows[i].Cells[0].Value.ToString();
                dateOrig = dgvSummary.Rows[i].Cells[1].Value.ToString();
                laborerCopy = laborerOrig;
                dateCopy = dateOrig;

                share += Convert.ToDouble(dgvSummary.Rows[i].Cells[5].Value);
                Console.WriteLine(dateOrig + @" - " +dgvSummary.Rows[i].Cells[0].Value + @" - " + share);
                continue;
            }
            else
            {
                laborerOrig = dgvSummary.Rows[i].Cells[0].Value.ToString();
                dateOrig = dgvSummary.Rows[i].Cells[1].Value.ToString();
                if (laborerCopy == laborerOrig && dateCopy == dateOrig)
                {
                    share += Convert.ToDouble(dgvSummary.Rows[i].Cells[5].Value);
                    Console.WriteLine(dateOrig + @" - " + dgvSummary.Rows[i].Cells[0].Value + @" - " + share);
                }
                else if (laborerCopy == laborerOrig && dateCopy != dateOrig)
                {
                    dateCopy = dateOrig;
                    share = Convert.ToDouble(dgvSummary.Rows[i].Cells[5].Value);
                    Console.WriteLine(dateOrig + @" - " + dgvSummary.Rows[i].Cells[0].Value + @" - " + share);
                }
                else
                {
                    laborerCopy = laborerOrig;
                    dateCopy = dateOrig;
                    share = Convert.ToDouble(dgvSummary.Rows[i].Cells[5].Value);
                    Console.WriteLine(dateOrig + @" - " + dgvSummary.Rows[i].Cells[0].Value + @" - " + share);
                }

            }
        }
    }

这与“how I can show the sum of in a datagridview column?”中的问题不同，因为该示例仅汇总该列中的所有内容。我需要的是对具有相同 ID 和相同日期的列的值求和。

非常感谢您的帮助。

Answer 1

一旦将类似信息收集到字典中，就会遍历数据。

现在字典将包含可以轻松计算的每个 ID 和日期的数字列表。

private void GetTotalShareForDay()
{
    var results = new Dictionary<string,List<decimal>>();

    for (var i = 0; i < dgvSummary.Rows.Count; i++)
    {
        string laborerId = dgvSummary.Rows[i].Cells[0].Value.ToString();
        string date = dgvSummary.Rows[i].Cells[1].Value.ToString();

        string uniqueKey = laboredId + ","  + date; // Looking at your data, this should provide a unique ID

        decimal share = Convert.ToDecimal(dgvSummary.Rows[i].Cells[5].Value);

        if (!results.ContainsKey(uniqueKey)) 
            results.Add(uniqueKey, new List<decimal>());
        results[uniqueKey].Add(share);
    }

    foreach(var key in results.Keys)
    {
        // key is laborerID + "," + date
        var sum = results[key].Sum();
    }
}

使用元组的版本（首选）

private void GetTotalShareForDay()
{
    var results = new Dictionary<Tuple<string, string>,List<decimal>>();

    for (var i = 0; i < dgvSummary.Rows.Count; i++)
    {
        string laborerId = dgvSummary.Rows[i].Cells[0].Value.ToString();
        string date = dgvSummary.Rows[i].Cells[1].Value.ToString();

        Tuple<string, string> uniqueKey = new Tuple<string, string>(laborerID, date); // laborerID and date combined provide uniqueness

        decimal share = Convert.ToDecimal(dgvSummary.Rows[i].Cells[5].Value);

        if (!results.ContainsKey(uniqueKey)) 
            results.Add(uniqueKey, new List<double>());
        results[uniqueKey].Add(share);
    }

    foreach(var key in results.Keys)
    {
        // key.Item1 is laborerID
        // key.Item2 is Date as string
        decimal sum = results[key].Sum();
        Console.Write("Laborer ID:" + key.Item1);
        Console.Write("Date:" + key.Item2);
        Console.Write("Sum:" + sum);
    }
}