Syncfusion.XlsIO.Base
Example 


Index of the IChartTrendLine to remove.

RemoveAt Method (IChartTrendLines)

Removes a IChartTrendLine from IChartTrendLines collection.
Syntax
'Declaration
 
Sub RemoveAt( _
   ByVal index As Integer _
) 
'Usage
 
Dim instance As IChartTrendLines
Dim index As Integer
 
instance.RemoveAt(index)
void RemoveAt( 
   int index
)

Parameters

index
Index of the IChartTrendLine to remove.
Example
The following code illustrates how to remove IChartTrendLine by index from IChartTrendLines
using Syncfusion.XlsIO;
using System;
            
class Program
{
    static void Main(string[] args)
    {
        using (ExcelEngine excelEngine = new ExcelEngine())
        {
            //Create worksheet
            IApplication application = excelEngine.Excel;
            application.DefaultVersion = ExcelVersion.Excel2013;
            IWorkbook workbook = application.Workbooks.Create(1);
            IWorksheet sheet = workbook.Worksheets[0];
            
            //Add data
            sheet.Range["A1"].Text = "Jan";
            sheet.Range["B1"].Text = "Feb";
            sheet.Range["C1"].Text = "Mar";
            sheet.Range["A2"].Value = "10";
            sheet.Range["B2"].Value = "20";
            sheet.Range["C2"].Value = "30";
            sheet.Range["A3"].Value = "15";
            sheet.Range["B3"].Value = "25";
            sheet.Range["C3"].Value = "35";
            
            //Create chart
            IChart chart = sheet.Charts.Add();
            
            //Set range
            chart.DataRange = sheet.Range["A1:C3"];
            
            //Set chart type
            chart.ChartType = ExcelChartType.Column_Clustered;
            
            //Get chart serie
            IChartSerie serie = chart.Series[0];
            
            //Get chart serie trendlines collection
            IChartTrendLines trendLines = serie.TrendLines;
            
            //Add trendlines
            IChartTrendLine trendLine1 = trendLines.Add(ExcelTrendLineType.Logarithmic);
            IChartTrendLine trendLine2 = trendLines.Add(ExcelTrendLineType.Linear);
            
            Console.WriteLine("Before TrendLines Count is: " + trendLines.Count);
            
            //Remove the trendline from the collection
            trendLines.RemoveAt(0);
            
            Console.WriteLine("After TrendLines Count is: " + trendLines.Count);
            
            //Save and Dispose
            workbook.SaveAs("Chart.xlsx");
            workbook.Close();
            Console.ReadKey();        
        }
    }
}
//Output will be
//Before TrendLines Count is: 2
//After TrendLines Count is: 1
AssemblyVersion

Syncfusion.XlsIO.Base: 17.1460.0.32

See Also