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我正在尝试使用 linq 输出具有匹配数据的某个答案。这是代码，

    public string[] netoilVar(string[] final)
    {
        var items = netOil.Zip(seqNum, (oil, seq) => new {Oil = oil, Seq = seq });
        var items2 = netOil2.Zip(seqNum2, (oil, seq) => new { Oil = oil, Seq = seq });

        List<string> vars = new List<string>();

        foreach (var item in items2.Join(items, i => i.Seq, i => i.Seq, (a, b) => new
        {
            x = a.Seq,
            y = this.GetTheAnswer(Convert.ToDouble(a.Oil), Convert.ToDouble(b.Oil)),

            oilnum1 = a.Oil,
            oilnum2 = b.Oil,
        }))

        {
            vars.Add(item.y + "," + item.oilnum1 + "," + item.oilnum2);
            final = vars.ToArray();
        }

        return final;
    }

    //BEGINS THE EXECUTE BUTTON METHOD
    private void executeBtn_Click(object sender, EventArgs e)
    {

        //NET OIL VARIANCE MATHEMATICS
        if (netOilRadBtn.Checked)
        {
            int i = listHead;
            string[] x = new String[1000]; 

            StreamWriter sw = new StreamWriter("testNetOil.csv");

            sw.WriteLine("Lease Name, Field Name, Reservoir, Operator, County, ST, Majo, Resv Cat, Discount Rate, Net Oil Interest, Net Gas Interest, Working Interest, Gross Wells, Ultimate Oil, Ultimate Gas, Gross Oil, Gross NGL, Gross Gas, Net Oil, Net Gas, Net NGL, Revenue To Int., Oper. Expense, Total Invest., Revenue Oil, Revenue Gas, Operating Profit, Revenue NGL, Disc Net Income, SEQ, Well ID, INC ASN, Life Years, Net Oil Variance., Current Year's Net Oil, Last Year's Net Oil");

            //Loops until the end of the list, printing out info
            while (i != -1)
            {
                sw.WriteLine("{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10}, {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20}, {21}, {22}, {23}, {24}, {25}, {26}, {27}, {28}, {29}, {30}, {31}, {32}, {33}, {34}",
                    QuoteString(leaseName[i]), fieldName[i], QuoteString2(reservoir[i]), operator1[i], county[i], state[i], majo[i], resvCatgory[i], disRate[i], netOil2Int[i], netGas2Int[i], workingInt[i], grossWells[i]
                    , ultOil[i], ultGas[i], grossOil[i], grossNGL[i], grossGas[i], netOil[i], netGas[i], netNGL[i], revToInt[i], operExpense[i], totInvest[i], revOil[i], revGas[i], operatingProfit[i],
                revNGL[i], discNetIncome[i], seqNum[i], wellID[i], incASN[i], lifeYears[i], ownQual[i], netoilVar(x)[i]);

                i = pointers[i];
            }
            sw.Close();

        }

我在打印出所有数据的 while 循环上得到了 IndexOutOfRangeException，尤其是在 netoilVar(x)[I] 部分。有什么办法可以在那里获得正确的索引，这样我就不会遇到异常？

4

1 回答 1

2

正如您在此处看到的，while 循环可能很危险。我强烈建议您抽象出您的数据以使事情更容易处理。

像这样对数据建模：

public class MyData
{
    public string LeaseName { get; set; }
    public int UltOil { get; set; }
    public int UltGas { get; set; }


    public static string GetHeaders()
    {
        return "LeaseName, UltOil, UltGas";
    }

    public override string ToString()
    {
        return string.Join(",", LeaseName, UltOil, UltGas);
    }
}

然后在写出你的 csv 文件时使用这样的模型：

private void Foo()
{
    //NET OIL VARIANCE MATHEMATICS
    if (netOilRadBtn.Checked)
    {
        var input = new List<MyData>(); // <-- Fill in your data here.

        StreamWriter sw = new StreamWriter("testNetOil.csv");

        sw.WriteLine(MyData.GetHeaders());

        //Loops until the end of the list, printing out info
        foreach (var item in input)
        {
            sw.WriteLine(item);
        }

        sw.Close();

    }
}

显然这是缩写的，您需要包含所有字段、名称并适当地键入它们。

于 2013-06-12T14:13:22.093 回答