Change the color of single data point in Excel chart in C#, VB.NET
Syncfusion Excel (XlsIO) library is a .NET Excel library used to create, read, and edit Excel documents. Also, converts Excel documents to PDF files. Using this library, you can change the color of chart data points.
This sample explains how to change the color of single data point in Excel chart.
Steps to change the color of a data point in Excel chart, programmatically:
- Create a new C# console application project.
Create a new C# console application project
- Install the Syncfusion.XlsIO.WinForms NuGet package as reference to your .NET Framework application from NuGet.org.
Install NuGet package to the project
- Add the Excel file with data for creating a chart into the project and make the file an Embedded Resource, by following the below steps.
- In Visual Studio, click the Project menu and select Add Existing Item. Find and select the Excel file you want to add to your project.
- In the Solution Explorer window, right-click on the Excel file you just added to your project and select Properties from the popup menu. The Properties tool window appears.
- In the Properties window, change the Build Action property to Embedded Resource.
- Build the project. All the Excel files will be compiled into your project’s assembly.
- A data point in Excel chart is represented by IChartDataPoint and the ForeColor property of IFill interface is used to fill the color in data point.
C#
//Change the color of a data point chart.Series[0].DataPoints[4].DataFormat.Fill.ForeColor = Color.YellowGreen;
VB.NET
'Change the color of a data point chart.Series(0).DataPoints(4).DataFormat.Fill.ForeColor = Color.YellowGreen
- Include the following namespaces in Program.cs file.
C#
using Syncfusion.XlsIO; using System.Drawing; using System.IO; using System.Reflection;
VB.NET
Imports System.Drawing Imports System.IO Imports System.Reflection Imports Syncfusion.XlsIO
- Include the following code snippet in main method of Program.cs file to change the color of single data point in Excel chart.
C#
using (ExcelEngine excelEngine = new ExcelEngine())
{
//Instantiate the Excel application object
IApplication application = excelEngine.Excel;
//Load an existing Excel file into IWorkbook
Assembly assembly = typeof(Program).GetTypeInfo().Assembly;
Stream fileStream = assembly.GetManifestResourceStream("DataPointColor.Sample.xlsx");
IWorkbook workbook = application.Workbooks.Open(fileStream, ExcelOpenType.Automatic);
//Get the first worksheet in workbook into IWorksheet
IWorksheet worksheet = workbook.Worksheets[0];
//Add a chart in the worksheet
IChartShape chart = worksheet.Charts.Add();
//Set the data range and title to the chart
chart.DataRange = worksheet.Range["A2:C12"];
chart.ChartTitle = "Texas Books Unit Sales";
//Set the chart series in column for assigned data region
chart.IsSeriesInRows = false;
//Set the position for chart in the worksheet
chart.TopRow = 2;
chart.LeftColumn = 5;
chart.BottomRow = 16;
chart.RightColumn = 13;
//Change the color of a data point
chart.Series[0].DataPoints[4].DataFormat.Fill.ForeColor = Color.YellowGreen;
//Save the Excel document
workbook.SaveAs("Output.xlsx");
}
VB.NET
Using excelEngine As ExcelEngine = New ExcelEngine()
'Instantiate the Excel application object
Dim application As IApplication = excelEngine.Excel
'Load an existing Excel file into IWorkbook
Dim assembly As Assembly = GetType(Module1).GetTypeInfo().Assembly
Dim fileStream As Stream = assembly.GetManifestResourceStream("VBSample.Sample.xlsx")
Dim workbook As IWorkbook = application.Workbooks.Open(fileStream, ExcelOpenType.Automatic)
'Get the first worksheet in workbook into IWorksheet
Dim worksheet As IWorksheet = workbook.Worksheets(0)
'Add a chart in the worksheet
Dim chart As IChartShape = worksheet.Charts.Add()
'Set the data range and title to the chart
chart.DataRange = worksheet.Range("A2:C12")
chart.ChartTitle = "Texas Books Unit Sales"
'Set the chart series in column for assigned data region
chart.IsSeriesInRows = False
'Set the position for chart in the worksheet
chart.TopRow = 2
chart.LeftColumn = 5
chart.BottomRow = 16
chart.RightColumn = 13
'Change the color of a data point
chart.Series(0).DataPoints(4).DataFormat.Fill.ForeColor = Color.YellowGreen
'Save the Excel document
workbook.SaveAs("Output.xlsx")
End Using
A complete working sample to change the color of single data point in Excel chart can be downloaded from DataPointColor.zip.
By executing the program, you will get the output Excel document as follows.
Output Excel document
Take a moment to peruse the documentation where you will find other options like creating and removing a chart, customizing chart and chart elements, sparkline, excel 2016 charts and creation of all supported chart types.
Click here to explore the rich set of Syncfusion Excel (XlsIO) library features.
An online sample link to create a chart worksheet.
See Also:
Set the axis interval in terms of days
Set the data label position for chart series
Change the color of gridlines in Excel chart
Copy and insert the chart in same worksheet
Position and re-size the plot area of chart
Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer the link to learn about generating and registering Syncfusion license key in your application to use the components without trial message.
