私はVBがあまり得意ではないので、C#で例を投稿し始めます(その後、本当に必要な場合は翻訳を試みることができます)。
アイテムをmschartにバインドし、列グラフを取得するために使用できるメソッドの3つの例を次に示します。
例1:単一領域と横並びの列
private void FillChartSingleArea()
{
// this set the datasource
this.chart1.DataSource = GetItems();
// clear all the (possible) existing series
this.chart1.Series.Clear();
// add the hours series
var hoursSeries = this.chart1.Series.Add("Hours");
hoursSeries.XValueMember = "Name";
hoursSeries.YValueMembers = "Hours";
hoursSeries.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Column;
// add the percentages series
var percSeries = this.chart1.Series.Add("Percentages");
percSeries.XValueMember = "Name";
percSeries.YValueMembers = "Percent";
percSeries.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Column;
}

例2:2つのチャートを重ねて
private void FillChartDoubleArea()
{
// this set the datasource
this.chart1.DataSource = GetItems();
// clear all the (possible) existing series
this.chart1.Series.Clear();
// clear all the existing areas and add 2 new areas
this.chart1.ChartAreas.Clear();
this.chart1.ChartAreas.Add("Area1");
this.chart1.ChartAreas.Add("Area2");
// add the hours series
var hoursSeries = this.chart1.Series.Add("Hours");
hoursSeries.ChartArea = "Area1";
hoursSeries.XValueMember = "Name";
hoursSeries.YValueMembers = "Hours";
hoursSeries.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Column;
// add the percentages series
var percSeries = this.chart1.Series.Add("Percentages");
hoursSeries.ChartArea = "Area2";
percSeries.XValueMember = "Name";
percSeries.YValueMembers = "Percent";
percSeries.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Column;
}

例3:単一領域と積み上げ列
private void FillStackedChartSingleArea()
{
// this set the datasource
this.chart1.DataSource = GetItems();
// clear all the (possible) existing series
this.chart1.Series.Clear();
// add the hours series
var hoursSeries = this.chart1.Series.Add("Hours");
hoursSeries.XValueMember = "Name";
hoursSeries.YValueMembers = "Hours";
hoursSeries.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.StackedColumn;
// add the percentages series
var percSeries = this.chart1.Series.Add("Percentages");
percSeries.XValueMember = "Name";
percSeries.YValueMembers = "Percent";
percSeries.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.StackedColumn;
}

GetItems
メソッドが次のように定義されている場合(すべての例):
private List<DOHoursChartItem> GetItems()
{
var items = new List<DOHoursChartItem>()
{
new DOHoursChartItem("John", 120),
new DOHoursChartItem("Amanda", 40),
new DOHoursChartItem("David", 70),
new DOHoursChartItem("Rachel", 10),
};
// compute the percentages
var totalHours = items.Sum(x => x.Hours);
foreach (var item in items)
item.Percent = (item.Hours * 100.0) / totalHours;
return items;
}
そしてとDOHoursChartItem
して:
class DOHoursChartItem
{
public String Name { get; set; }
public double Hours { get; set; }
public double Percent { get; set; }
public DOHoursChartItem(string name, double hours)
{
this.Name = name;
this.Hours = hours;
}
}
NB
これらは実際には縦棒グラフです。ChartTypeをBar
(またはStackedBar
)に設定すると、同じ結果が得られますが、バーは水平方向になります。