draw a graph of the devexpress suite with a summary ?

Hi Dong you can try it's working for me. 

 

// Create an empty chart.
ChartControl PieChart3D = new ChartControl();

// Create a pie series.
Series series1 = new Series("Pie Series 1", ViewType.Pie3D);

// Populate the series with points.
series1.Points.Add(new SeriesPoint("Russia", 17.0752));
series1.Points.Add(new SeriesPoint("Canada", 9.98467));
series1.Points.Add(new SeriesPoint("USA", 9.63142));
series1.Points.Add(new SeriesPoint("China", 9.59696));
series1.Points.Add(new SeriesPoint("Brazil", 8.511965));
series1.Points.Add(new SeriesPoint("Australia", 7.68685));
series1.Points.Add(new SeriesPoint("India", 3.28759));
series1.Points.Add(new SeriesPoint("Others", 81.2));

// Add the series to the chart.
PieChart3D.Series.Add(series1);

// Adjust the value numeric options of the series.
series1.PointOptions.ValueNumericOptions.Format = NumericFormat.Percent;
series1.PointOptions.ValueNumericOptions.Precision = 0;

// Adjust the view-type-specific options of the series.
((Pie3DSeriesView)series1.View).Depth = 30;
((Pie3DSeriesView)series1.View).ExplodedPoints.Add(series1.Points[0]);
((Pie3DSeriesView)series1.View).ExplodedDistancePercentage = 30;

// Access the diagram's options.
((SimpleDiagram3D)PieChart3D.Diagram).RotationType = RotationType.UseAngles;
((SimpleDiagram3D)PieChart3D.Diagram).RotationAngleX = -35;

// Add a title to the chart and hide the legend.
ChartTitle chartTitle1 = new ChartTitle();
chartTitle1.Text = "3D Pie Chart";
PieChart3D.Titles.Add(chartTitle1);
PieChart3D.Legend.Visible = false;

// Calculate summary statistics
double totalValue = series1.Points.Sum(p => p.Values[0]);
double maxValue = series1.Points.Max(p => p.Values[0]);
double minValue = series1.Points.Min(p => p.Values[0]);
double averageValue = series1.Points.Average(p => p.Values[0]);

// Create a summary paragraph
string summary = $"Total: {totalValue}\nMax: {maxValue}\nMin: {minValue}\nAverage: {averageValue}";

// Add a label to display the summary
LabelControl lblSummary = new LabelControl();
lblSummary.Text = summary;
lblSummary.Dock = DockStyle.Bottom;
this.Controls.Add(lblSummary);

// Add the chart to the form.
PieChart3D.Dock = DockStyle.Fill;
this.Controls.Add(PieChart3D);

In this modified code, after creating the chart and adjusting its properties, we calculate the summary statistics for the series using LINQ operations. Then, we create a summary paragraph string that contains the total, max, min, and average values.

i have add a LabelControl named lblSummary to the form, set its text to the summary string, and dock it to the bottom of the form. Finally, we add the label and the chart to the form to display both the chart and the summary information.