Series.Trendlines Property

Provides access to a collection of trendlines for the series.

Namespace: DevExpress.Spreadsheet.Charts

Assembly: DevExpress.Spreadsheet.v23.2.Core.dll

NuGet Package: DevExpress.Spreadsheet.Core

Declaration

C#

TrendlineCollection Trendlines { get; }

VB.NET

ReadOnly Property Trendlines As TrendlineCollection

Property Value

Type	Description
TrendlineCollection	A TrendlineCollection object that is the collection of all the Trendline objects for the series.

Remarks

The following code uses the TrendlineCollection.Add method to display a trendline of the ChartTrendlineType.Polynomial type. The result is opened in Microsoft Excel.

View Example

TrendlineActions.cs

Worksheet worksheet = workbook.Worksheets["chartTask3"];
workbook.Worksheets.ActiveWorksheet = worksheet;

// Create a chart and specify its location.
Chart chart = worksheet.Charts.Add(ChartType.ColumnStacked);
chart.SelectData(worksheet["C2:F3"], ChartDataDirection.Row);
chart.TopLeftCell = worksheet.Cells["H2"];
chart.BottomRightCell = worksheet.Cells["N14"];

// Show data labels.
chart.Views[0].DataLabels.ShowValue = true;

// Display a polynomial trendline.
chart.Series[0].Trendlines.Add(ChartTrendlineType.Polynomial);

TrendlineActions.vb

Dim worksheet As Worksheet = workbook.Worksheets("chartTask3")
workbook.Worksheets.ActiveWorksheet = worksheet

' Create a chart and specify its location.
Dim chart As Chart = worksheet.Charts.Add(ChartType.ColumnStacked)
chart.SelectData(worksheet("C2:F3"), ChartDataDirection.Row)
chart.TopLeftCell = worksheet.Cells("H2")
chart.BottomRightCell = worksheet.Cells("N14")

' Show data labels.
chart.Views(0).DataLabels.ShowValue = True

' Display a polynomial trendline.
chart.Series(0).Trendlines.Add(ChartTrendlineType.Polynomial)

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Trendlines 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#

spreadsheet-document-api-chart-examples/CS/SpreadsheetDocServerChartAPISamples/CodeExamples/TrendlineActions.cs#L58

// Customize the trendline.
Trendline tline = chart.Series[0].Trendlines[0];
tline.DisplayEquation = true;

wpf-spreadsheet-chart-api/CS/SpreadsheetWPFChartAPISamples/CodeExamples/TrendlineActions.cs#L60

// Customize the trendline.
Trendline tline = chart.Series[0].Trendlines[0];
tline.DisplayEquation = true;

winforms-spreadsheet-chart-api/CS/SpreadsheetChartAPISamples/CodeExamples/TrendlineActions.cs#L60

// Customize the trendline.
Trendline tline = chart.Series[0].Trendlines[0];
tline.DisplayEquation = true;

VB.NET

spreadsheet-document-api-chart-examples/VB/SpreadsheetDocServerChartAPISamples/CodeExamples/TrendlineActions.vb#L58

' Customize the trendline.
Dim tline As Trendline = chart.Series(0).Trendlines(0)
tline.DisplayEquation = True

wpf-spreadsheet-chart-api/VB/SpreadsheetWPFChartAPISamples/CodeExamples/TrendlineActions.vb#L56

' Customize the trendline.
Dim tline As Trendline = chart.Series(0).Trendlines(0)
tline.DisplayEquation = True

winforms-spreadsheet-chart-api/VB/SpreadsheetChartAPISamples/CodeExamples/TrendlineActions.vb#L55

'Customize the trendline.
Dim tline As Trendline = chart.Series(0).Trendlines(0)
tline.DisplayEquation = True