c# - 访问记录数组中的数据答案

【问题标题】：c# - Accessing data in a record arrayc# - 访问记录数组中的数据
【发布时间】：2016-04-18 18:11:17
【问题描述】：

我有 7 个数组被分别读取，然后使用它们组合成一个数组，这是我的“记录”数组。

这是我的记录结构：

public class Record
{
    // Each of the data
    public string month;
    public int afDays;
    public int years;
    public double rainfall;
    public double sunshineHours;
    public double maxTemp;
    public double minTemp;

    // Constructor
    public Record(string newMonth, int newAfDays, int newYears, double newRainfall, double newSunshine, double newMaxTemp, double newMinTemp)
    {
        // Set the instance variables to each of the given values.
        month = newMonth;
        afDays = newAfDays;
        years = newYears;
        rainfall = newRainfall;
        sunshineHours = newSunshine;
        maxTemp = newMaxTemp;
        minTemp = newMinTemp;
    }
}

然后我希望通过使用用户输入“年份”来搜索这个数组，然后搜索这个记录数组并显示所有匹配年份的数组条目的完整记录。

这就是记录数组的构造方式

// Set the size of the record array, using the length of month - as its the       size of the data set.
recordArray = new Record[months.Length];
for (int i = 0; i < months.Length; i++)
{
    // Make a new record using each of the elements of each array.
    recordArray[i] = new Record(months[i], afDays[i], years[i], rainfall[i], sunshineHours[i], maxTemp[i], minTemp[i]);
}

然后我希望使用类似于以下的语句来搜索数组：

case ConsoleKey.D4: //Search and display by Year
    Console.WriteLine("Please input a year");
    int userYear = 0;
    userYear = int.Parse(Console.ReadLine());
    for (int i = 0; i < analyser.years.Length; i++) //unfinished
    {
       if (analyser.recordArray.years = useryears)

    }

【问题讨论】：

目前看起来还不错 - 你有什么问题？您认为if 语句中应该包含什么内容？
提示：= 用于分配； == 用于比较。接下来，考虑如何在循环中使用i。
好吧，我想只在当前记录与用户输入年份匹配时才打印出当前记录，因此如上所示的 analyser.recordArray.years == useryears 行。但我得到“记录不包含“年”等的定义......
recordArray[i].years。整个记录数组没有 years 属性。来自它的一条记录，确实如此。
将尝试此@ManoDestra 并报告。提前致谢！编辑：完美运行，谢谢！

标签： c# arrays search

【解决方案1】：

见下面的代码：

public class Record
{
    // Each of the data
    public string month;
    public int afDays;
    public int years;
    public double rainfall;
    public double sunshineHours;
    public double maxTemp;
    public double minTemp;

    // Constructor
    public Record(string newMonth, int newAfDays, int newYears,
        double newRainfall, double newSunshine, double newMaxTemp, double newMinTemp)
    {
        // Set the instance variables to each of the given values.
        month = newMonth;
        afDays = newAfDays;
        years = newYears;
        rainfall = newRainfall;
        sunshineHours = newSunshine;
        maxTemp = newMaxTemp;
        minTemp = newMinTemp;
    }

    public static Dictionary<int, Record> getRecords(string[] months, int[] afDays, int[] years,
        double[] rainfall, double[] sunshineHours, double[] maxTemp, double[] minTemp)
    {
        return months.Select((m, i) => new Record(months[i], afDays[i], years[i],
            rainfall[i], sunshineHours[i], maxTemp[i], minTemp[i])).ToDictionary(r => r.years);
    }
}

如果有多个记录具有相同的years：

    public static Dictionary<int, List<Record>> getRecords(string[] months, int[] afDays, int[] years,
        double[] rainfall, double[] sunshineHours, double[] maxTemp, double[] minTemp)
    {
        return months.Select((m, i) => new Record(months[i], afDays[i], years[i],
            rainfall[i], sunshineHours[i], maxTemp[i], minTemp[i])).GroupBy(r => r.years).ToDictionary(g => g.Key, g => g.ToList());
    }

【讨论】：