在新行中按日期添加分组中的运行总和

Question

我正在使用 Syncfusion DocIO 在 .docx 中使用一些道具创建表，但无法按日期创建行 => 在每个新年我都需要新的行数。 我已经创建了 sum 行，但是该行返回所有 sum 以获取其他道具（列）， 所以我需要的只是每一年的新行总和。

我的例子：

Months	Anuity	InterestPaid	PrincipalPaid	BalanceDue	Date
1	84,69	2,50	82,19	917,81	2021/11/12
2	84,69	2,29	82,40	835,41	2021/12/12
Sum for year 2021
3	84,69	2,09	82,61	752,80	2022/1/12
4	84,69	1,88	82,81	669,99	2022/2/12
5	84,69	1,67	83,02	586,97	2022/3/12
6	84,69	1,47	83,23	503,75	2022/4/12
7	84,69	1,26	83,43	420,31	2022/5/12
8	84,69	1,05	83,64	336,67	2022/6/12
9	84,69	0,84	83,85	252,82	2022/7/12
10	84,69	0,63	84,06	168,75	2022/8/12
11	84,69	0,42	84,27	84,48	2022/9/12
12	84,69	0,21	84,48	0,00	2022/10/12
Sum for year 2022
Sum all	1016,32	16,32	1000,00

我的代码：

        int i = 1;
        
        foreach (var amortizationData in aAmortizationPlanLoanPayment)
        {
            WTableRow tableRow = tableAmortizationData.AddRow(true);

            tableRow.Cells[0].AddParagraph().AppendText(i.ToString());
            tableRow.Cells[1].AddParagraph().AppendText(amortizationData.Anuity.ToString());
            tableRow.Cells[2].AddParagraph().AppendText(amortizationData.InterestPaid.ToString());
            tableRow.Cells[3].AddParagraph().AppendText(amortizationData.PrincipalPaid.ToString());
            tableRow.Cells[4].AddParagraph().AppendText(amortizationData.BalanceDue.ToString());
            tableRow.Cells[5].AddParagraph().AppendText(amortizationData.Date.AddMonths(aAmortizationPlanLoanPaymentData.Moratorium).ToString("yyyy/M/dd"));
            i++;
            
            if (amortizationData.Date.Month == 12)
            {
                    WTableRow YearSumrow = tableAmortizationData.AddRow(true);

                    WTableCell cell1 = YearSumrow.Cells[0];

                    var sumYearIWTextRange = cell1.AddParagraph().AppendText($"Sum for year {amortizationData.Date.Year}");

                sumYearIWTextRange = YearSumrow.Cells[1].AddParagraph().AppendText(); // need here running sum inside appendText();

                sumYearIWTextRange = YearSumrow.Cells[2].AddParagraph().AppendText(); // need here running sum inside appendText();

                sumYearIWTextRange = YearSumrow.Cells[3].AddParagraph().AppendText(); // need here running sum inside appendText();
            }

            if (amortizationData.BalanceDue == 0.00)
            {
                WTableRow LastYearRow = tableAmortizationData.AddRow(true);

                WTableCell cellLastYear = LastYearRow.Cells[0];

                var sumLastYearIWTextRange = cellLastYear.AddParagraph().AppendText($"Sum for year {amortizationData.Date.Year}");

                sumLastYearIWTextRange = LastYearRow.Cells[1].AddParagraph().AppendText(); // need here running sum inside appendText();

                sumLastYearIWTextRange = LastYearRow.Cells[2].AddParagraph().AppendText(); // need here running sum inside appendText();

                sumLastYearIWTextRange = LastYearRow.Cells[3].AddParagraph().AppendText(); // need here running sum inside appendText();
            }
        }

        
        WTableRow tableRowSum = tableAmortizationData.AddRow(true);
        WTableCell cell = tableRowSum.Cells[0];

        var totalIWTextRage = cell.AddParagraph().AppendText("Sum all");

        var totalAmountIWTextRage = tableRowSum.Cells[1].AddParagraph().AppendText(aAmortizationPlanLoanPayment.Sum(p => p.Anuity).ToString());

        totalAmountIWTextRage = tableRowSum.Cells[2].AddParagraph().AppendText(aAmortizationPlanLoanPayment.Sum(p => p.InterestPaid).ToString());

        totalAmountIWTextRage = tableRowSum.Cells[3].AddParagraph().AppendText(aAmortizationPlanLoanPayment.Sum(p => p.PrincipalPaid).ToString());

Answer 1

如果您有一堆数字（已经分组并汇总到不同的日期，但不必如此）；

(DateTime D, int V)[] rows = new [] {
  (new(1999, 12, 1), 111), 
  (new(2000, 1, 1), 222), 
  (new(2000, 2, 1), 333), 
  (new(2000, 3, 1), 444),
  (new(2001, 1, 1), 555)
}

那么，当然，您可以使用 LINQ 来计算总和：

foreach(var row in rows){
  var runSum = rows.Where(r => r.D <= row.D).Sum(r => r.V);
}

但这比仅仅保留一个变量更浪费资源：

var runSum = 0;
foreach(var row in rows){
  runSum += row.V;
}

如果您希望您的运行总和不时重新开始，只需记住前一行（当然您的行需要按顺序排列）：

var prevRow = rows[0];
var runSum = 0;
foreach(var row in rows){

  if(prevRow.D.Year != row.D.Year)
    runSum = 0;

  runSum += row.V;
}

如果您不希望当前行的值出现在总计中，则将输出置于增加 runSum 的行之上，如果这样做，则将输出置于其之下