streamwriter 将重复行写入文件

Question

我被难住了。我有一个来自 3 个数据 table 的数据正在写入一个文本文件，但是当我将某个 table 写入该文件时，它正在写入重复项，我不知道为什么。

这是写入文件的代码

        public void writeCharge2(StreamWriter sw, string dos1, int i)
    {
        getCharges(dos1, SqlCon);
        foreach (DataRow row in chargeTable.Rows)
        {
            for (int n = 0; n <= chargeTable.Rows.Count -1; n++)
            {                    
                ChargeLine = chargeTable.Rows[n][0].ToString();

                writeCharge(sw, dos1, i, ChargeLine);
                sw.WriteLine();
                payChart.Reset();
                payGraph.Reset();
            }

        }
        chargeTable.Reset();
    }

    public void writeCharge(StreamWriter sw, string dos2, int i, string CPTLine)
    {
        getPayments(ChargeLine, SqlCon, dos2);
        string description = getDesc(CPTLine, SqlCon);
        sw.WriteLine("   Description: " + CPTLine + " - " + description);
        sw.WriteLine("-----------Payments-----------");

        if (i < payGraph.Rows.Count)
        {
            foreach (DataRow row in payGraph.Rows)
            {
                for (i = 0; i < row.ItemArray.Length -1; i++)
                {
                    DateTime payDate = Convert.ToDateTime(payGraph.Rows[i][0].ToString());
                    string payDate1 = payDate.ToString("MM/dd/yyyy");
                    decimal money = Convert.ToDecimal(payGraph.Rows[i][1].ToString());
                    string money1 = money.ToString("C");
                    string payer = payGraph.Rows[i][2].ToString();

                    sw.Write("Payment Date: " + payDate1 + " | ");
                    sw.Write("Amount: " + money1 + " | ");
                    sw.Write("Payer: " + payer);
                    sw.WriteLine();
                }

                sw.WriteLine();
            }
        }

    }

        public void writeData(StreamWriter sw)
    {
        clearTables();
        getDos(SqlCon);
        int i = 0;

        foreach(DataRow row in servicetable.Rows)
        {
            string dosNow = Convert.ToString(servicetable.Rows[i][0]);

            setupPat(sw, i);
            writeCharge2(sw, dosNow, i);
            sw.WriteLine(Environment.NewLine);
                i++;

        }

这是它被写入文件的方式，您可以看到正在写入的重复行

Answer 1

这是因为 foreach 在 writeCharge2 函数中不需要循环。您使用 foreach 迭代行，然后在每次迭代中打印所有行，因此对于 2 行，它们将打印两次，对于 3 行 - 3 次等。

streamwriter 将重复行写入文件

streamwriter writing duplicate lines to file

c#

sql

datatable

streamwriter