SummaryOptionsBase.SummaryFunction Property

Gets or sets the summary function that calculates the series points’ total value.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v24.2.dll

Declaration

C#

[XtraChartsLocalizableCategory(XtraChartsCategory.Data)]
public string SummaryFunction { get; set; }

VB.NET

<XtraChartsLocalizableCategory(XtraChartsCategory.Data)>
Public Property SummaryFunction As String

Property Value

Type	Description
String	The string that defines the summary function that calculates the series points’ total value.

Remarks

The chart control provides the following built-in summary functions:

• minimum (“MIN([Field_name])”);
• maximum (“MAX([Field_name])”);
• sum (“SUM([Field_name])”);
• average (“AVERAGE([Field_name])”);
• count (“COUNT()”).

Example

This example demonstrates how to use the summary options to configure the date-time data source summarization:

C#

List<SaleItem> dataSource = this.viewModel.GetSaleItems();
this.chartControl.DataSource = dataSource;
SeriesTemplate template = this.chartControl.SeriesTemplate;
template.SeriesDataMember = "Category";
template.ArgumentDataMember = "Company";
template.DateTimeSummaryOptions.MeasureUnit = DateTimeMeasureUnit.Month;
template.DateTimeSummaryOptions.SummaryFunction = "SUM([Income])";
template.View = new StackedBarSeriesView();

VB.NET

Dim dataSource As List<SaleItem> = Me.ViewModel.GetSaleItems()
Me.ChartControl.DataSource = dataSource
With Me.chartControl.SeriesTemplate
    .SeriesDataMember = "Category"
    .ArgumentDataMember = "Company"
    .DateTimeSummaryOptions.MeasureUnit = DateTimeMeasureUnit.Month
    .DateTimeSummaryOptions.SummaryFunction = "SUM([Income])"
    .View = new StackedBarSeriesView()
End With

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the SummaryFunction property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

winforms-charts-apply-the-best-fit-function-to-a-series/CS/LineOfBestFit/Form1.cs#L108

chartControl1.Series[1].ValueDataMembers.AddRange(new string[] { "MyData" });
this.chartControl1.Series[1].NumericSummaryOptions.SummaryFunction = "BESTFIT()";
this.textBox1.Text = r.ToString();

VB.NET

winforms-charts-apply-the-best-fit-function-to-a-series/VB/LineOfBestFit/Form1.vb#L93

chartControl1.Series(1).ValueDataMembers.AddRange(New String() {"MyData"})
chartControl1.Series(1).NumericSummaryOptions.SummaryFunction = "BESTFIT()"
textBox1.Text = r.ToString()