How to create Excel scatter with smooth lines chart in C#, VB.NET?
This article explains how to create a scatter with smooth line chart in Excel using XlsIO.
What is scatter with smooth line chart?
A scatter with smooth line chart is used to compare at least two sets of values or pairs of data. The values are represented with a connected smooth line.
Scatter with smooth line chart created using XlsIO
To create a scatter with smooth line chart in Excel using XlsIO, you need to do the following steps.
Steps to create scatter with smooth line chart
- Initialize chart
Create a chart object by calling the worksheet.Charts.Add method and specify the chart type to ExcelChartType.Scatter_SmoothedLine enum value.
//Create the chart IChartShape chart = worksheet.Charts.Add(); //Set chart type to Scatter_SmoothedLine chart.ChartType = ExcelChartType.Scatter_SmoothedLine;
- Assign data
Set a range of data from the worksheet to chart’s DataRange property. To plot the series values in column and categories in row, set chart’s IsSeriesInRows property to false.
//Set region of Chart data chart.DataRange = worksheet["A3:B7"]; //Set chart series in column for assigned data region chart.IsSeriesInRows = false;
- Apply basic chart elements
Add the basic elements like chart title, data labels and legend.
- ChartTitle of chart object.
- Set DataLabels via DefaultDataPoint.
- Set TRUE to chart’s HasLegend property to show the legend. Else FALSE.
//Apply chart elements //Set Chart Title chart.ChartTitle = "Scatter With Smooth Line Chart"; //Set Legend chart.HasLegend = false; //Set Datalabels IChartSerie serie = chart.Series[0]; serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true; serie.DataPoints.DefaultDataPoint.DataLabels.IsCategoryName = true;
Applicable properties for scatter with smooth lines chart
Property applicable for a scatter with smooth line chart along with common line properties is
1. IsVaryColor
NOTE: Applying properties apart from the mentioned property and line properties might throw exception or the changes will not be reflected in the output document because those properties are not related to scatter chart.
To know more about creating charts with various settings using XlsIO, please refer the documentation.
The following C#/ VB.NET complete code snippet shows the creation of scatter with smooth line chart using XlsIO.
C#
using Syncfusion.XlsIO;
using System.Reflection;
using System.IO;
namespace ChartSample
{
class Program
{
static void Main(string[] args)
{
using (ExcelEngine excelEngine = new ExcelEngine())
{
IApplication application = excelEngine.Excel;
application.DefaultVersion = ExcelVersion.Excel2016;
//Open existing workbook with data entered
Assembly assembly = typeof(Program).GetTypeInfo().Assembly;
Stream fileStream = assembly.GetManifestResourceStream("ChartSample.InputTemplate.xlsx");
IWorkbook workbook = application.Workbooks.Open(fileStream);
IWorksheet worksheet = workbook.Worksheets[0];
//Initialize chart
IChartShape chart = worksheet.Charts.Add();
chart.ChartType = ExcelChartType.Scatter_SmoothedLine;
//Assign data
chart.DataRange = worksheet["A3:B7"];
chart.IsSeriesInRows = false;
//Apply chart elements
//Set Chart Title
chart.ChartTitle = "Scatter With Smooth Line Chart";
//Set Legend
chart.HasLegend = false;
//Set Datalabels
IChartSerie serie = chart.Series[0];
serie1.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
serie1.DataPoints.DefaultDataPoint.DataLabels.IsCategoryName = true;
//Positioning the chart in the worksheet
chart.TopRow = 8;
chart.LeftColumn = 1;
chart.BottomRow = 23;
chart.RightColumn = 8;
//Saving and closing the workbook
Stream stream = File.Create("Output.xlsx");
workbook.SaveAs(stream);
}
}
}
}
VB
Imports Syncfusion.XlsIO
Imports System.Reflection
Imports System.IO
Namespace ChartSample
Class Program
Public Shared Sub Main(ByVal args As String())
Using excelEngine As ExcelEngine = New ExcelEngine()
Dim application As IApplication = excelEngine.Excel
application.DefaultVersion = ExcelVersion.Excel2016
'Open existing workbook with data entered
Dim assembly As Assembly = GetType(Program).GetTypeInfo().Assembly
Dim fileStream As Stream = assembly.GetManifestResourceStream("ChartSample.InputTemplate.xlsx")
Dim workbook As IWorkbook = application.Workbooks.Open(fileStream)
Dim worksheet As IWorksheet = workbook.Worksheets(0)
'Initialize chart
Dim chart As IChartShape = worksheet.Charts.Add()
chart.ChartType = ExcelChartType.Scatter_SmoothedLine
'Assign data
chart.DataRange = worksheet("A3:B7")
chart.IsSeriesInRows = False
'Apply chart elements
'Set Chart Title
chart.ChartTitle = "Scatter With Smooth Line Chart"
'Set Legend
chart.HasLegend = False
'Set Datalabels
IChartSerie serie = chart.Series[0]
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = True
serie.DataPoints.DefaultDataPoint.DataLabels.IsCategoryName = True
'Positioning chart in the worksheet
chart.TopRow = 8
chart.LeftColumn = 1
chart.BottomRow = 23
chart.RightColumn = 8
'Saving and closing the workbook
Dim stream As Stream = File.Create("Output.xlsx")
workbook.SaveAs(stream)
End Using
End Sub
End Class
End Namespace
