/// <summary>
/// Adds a single data point to the chart
/// </summary>
/// <param name="year">X Value - Year being recorded</param>
/// <param name="numAlive">Y Value - Number of people alive</param>
public void AddDataPointToChart(YearStatistic stat)
{
DataPoint dataPoint = new DataPoint();
dataPoint.AxisLabel = stat.Year.ToString();
dataPoint.Label = stat.NumPeopleAlive.ToString();
dataPoint.XValue = stat.Year;
dataPoint.YValues = new double[] { stat.NumPeopleAlive };
chart.Series[0].Points.Add(dataPoint);
}
/// <summary>
/// Finds the year(s) with the most people alive and adds a data point to the chart for each year evaluated
/// </summary>
/// <param name="startYear"></param>
/// <param name="endYear"></param>
/// <param name="people"></param>
/// <returns>The year(s) with the most people alive</returns>
public List <YearStatistic> FindYearsWithMostPeopleAlive(int startYear, int endYear, XmlNodeList people)
{
List <YearStatistic> bestYears = new List <YearStatistic>();
int numAliveDuringBestYears = 0;
for (int year = startYear; year < endYear; year++)
{
int numAlive = 0;
foreach (XmlNode person in people)
{
int birthYear = Int32.Parse(person.SelectSingleNode("BirthYear").InnerText);
int deathYear = Int32.Parse(person.SelectSingleNode("DeathYear").InnerText);
Person p = new Person(birthYear, deathYear);
if (p.WasAliveDuringYear(year))
{
numAlive++;
}
}
// If the year being evaluated has the same number of people alive as other best year(s),
// add it to the list to keep track of all years. If it has more people alive than other best
// years, clear the list and start it over with the new best year.
YearStatistic stat = new YearStatistic(year, numAlive);
if (numAlive == numAliveDuringBestYears)
{
bestYears.Add(stat);
}
else if (numAlive > numAliveDuringBestYears)
{
bestYears.Clear();
bestYears.Add(stat);
numAliveDuringBestYears = numAlive;
}
AddDataPointToChart(stat);
}
return(bestYears);
}