officefileapi-devexpress-dot-spreadsheet-dot-charts-dot-series-de581e12.md
Provides access to a collection of trendlines for the series.
Namespace : DevExpress.Spreadsheet.Charts
Assembly : DevExpress.Spreadsheet.v25.2.Core.dll
NuGet Package : DevExpress.Spreadsheet.Core
TrendlineCollection Trendlines { get; }
ReadOnly Property Trendlines As TrendlineCollection
| Type | Description |
|---|---|
| TrendlineCollection |
A TrendlineCollection object that is the collection of all the Trendline objects for the series.
|
The following code uses the TrendlineCollection.Add method to display a trendline of the ChartTrendlineType.Polynomial type. The result is opened in Microsoft Excel.
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);
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)
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.
// 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;
' 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
See Also