TrendlineCollection.Item

TrendlineCollection indexer

Gets a Trendline object by its index.

public Trendline this[int index] { get; }

Examples

using System;
using Aspose.Cells;
using Aspose.Cells.Charts;

namespace AsposeCellsExamples
{
    public class TrendlineCollectionPropertyItemDemo
    {
        public static void Run()
        {
            // Create a new workbook
            Workbook workbook = new Workbook();
            Worksheet sheet = workbook.Worksheets[0];

            // Add sample data
            sheet.Cells["A1"].PutValue(1);
            sheet.Cells["A2"].PutValue(2);
            sheet.Cells["A3"].PutValue(3);
            sheet.Cells["B1"].PutValue(4);
            sheet.Cells["B2"].PutValue(5);
            sheet.Cells["B3"].PutValue(6);

            // Add a chart
            int chartIndex = sheet.Charts.Add(ChartType.Line, 5, 0, 20, 8);
            Chart chart = sheet.Charts[chartIndex];
            
            // Set chart data source
            chart.NSeries.Add("A1:A3", true);
            chart.NSeries[0].Values = "B1:B3";

            // Add a trendline
            int trendlineIndex = chart.NSeries[0].TrendLines.Add(TrendlineType.Linear);
            Trendline trendline = chart.NSeries[0].TrendLines[trendlineIndex];

            // Demonstrate Item property usage
            Trendline firstTrendline = chart.NSeries[0].TrendLines[0];
            Console.WriteLine("Trendline Type: " + firstTrendline.Type);
        }
    }
}

See Also