How to set error bar for Excel chart in C#, VB.NET?
This article explains how to set Error Bars in a chart using XlsIO.
What are Error Bars?
Error bars express potential error amounts that are graphically relative to each data point or data marker in a data series. This can be achieved in XlsIO using the HasErrorBarsX and HasErrorBarsY properties in the chart series.
Code snippet to set Error Bars
// Set error bar
chart.Series[0].HasErrorBarsY = true;
chart.Series[0].ErrorBarsY.Type = ExcelErrorBarType.Percentage;Notes:
1. Horizontal error bars (ErrorBarsX) are applicable for 2D bar charts.
2. Vertical error bars (ErrorBarsY) are applicable for 2D line charts, 2D column charts, 2D area charts, and stock charts.
3. Scatter charts and bubble charts (both 2D and 3D) support horizontal error bars and vertical error bars.
4. The error bar type can be selected using the Type property.
To know more about creating charts with various settings using XlsIO, please refer the documentation.
The following C#/ VB.NET complete code snippet shows how to set error bar in 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 and assign data
IChartShape chart = worksheet.Charts.Add();
chart.ChartType = ExcelChartType.Column_Clustered;
// Assign data
chart.DataRange = worksheet["A1:D6"];
chart.IsSeriesInRows = false;
// Apply chart elements
// Set chart title
chart.ChartTitle = "Clustered Column Chart";
// Set error bars
chart.Series[0].HasErrorBarsY = true;
chart.Series[1].HasErrorBarsY = true;
chart.Series[2].HasErrorBarsY = true;
chart.Series[0].ErrorBarsY.Type = ExcelErrorBarType.Percentage;
chart.Series[1].ErrorBarsY.Type = ExcelErrorBarType.Percentage;
chart.Series[2].ErrorBarsY.Type = ExcelErrorBarType.Percentage;
// Positioning the chart in the worksheet
chart.TopRow = 8;
chart.LeftColumn = 1;
chart.BottomRow = 23;
chart.RightColumn = 8;
// Saving 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 and assign data
Dim chart As IChartShape = worksheet.Charts.Add
chart.ChartType = ExcelChartType.Column_Clustered
'Assign data
chart.DataRange = worksheet("A1:D6")
chart.IsSeriesInRows = False
'Apply chart elements
'Set chart title
chart.ChartTitle = "Clustered Column Chart"
'Set error bars
chart.Series(0).HasErrorBarsY = True
chart.Series(1).HasErrorBarsY = True
chart.Series(2).HasErrorBarsY = True
chart.Series(0).ErrorBarsY.Type = ExcelErrorBarType.Percentage
chart.Series(1).ErrorBarsY.Type = ExcelErrorBarType.Percentage
chart.Series(2).ErrorBarsY.Type = ExcelErrorBarType.Percentage
'Positioning the chart in the worksheet
chart.TopRow = 8
chart.LeftColumn = 1
chart.BottomRow = 23
chart.RightColumn = 8
'Saving the workbook
Dim stream As Stream = File.Create("Output.xlsx")
workbook.SaveAs(stream)
End Using
End Sub
End Class
End Namespace
Error bars set using XlsIO
Take a moment to peruse the documentation, where you can find basic worksheet data manipulation options along with features like Conditional Formatting, worksheet calculations through formulas, adding charts in worksheets or workbooks, organizing and analyzing data through tables and pivot tables, appending multiple records to a worksheet using template markers, and most importantly, PDF and image conversions, etc., with code examples.
Refer here to explore the rich set of Syncfusion Essential XlsIO features.
Note:
Starting with v16.2.0.x, if you reference Syncfusion assemblies from the trial setup or from the NuGet feed, include a license key in your projects. Refer to this link to learn about generating and registering a Syncfusion license key in your application to use the components without a trial message.
Conclusion:
I hope you enjoyed learning about how to set error bars for Excel charts in C# and VB.NET.
You can refer to our XlsIO’s feature tour page to learn about its other groundbreaking features. Explore our UG documentation and online demos to understand how to manipulate data in Excel documents.
If you are an existing user, you can access our latest components from the License and Downloads page. For new users, you can try our 30-day free trial to check out XlsIO and other Syncfusion components.
If you have any queries or require clarification, please let us know in the comments below or contact us through our support forums or feedback portal. We are always happy to assist you!
