How to set invert if negative for Excel chart in C#, VB.NET?
This article explains how to set invert if negative in chart using .NET XlsIO Library.
What is the purpose of invert if negative?
When a chart series contains both positive and negative data points, the data bars are created with same color by default. To make the chart more clear and professional, the color of negative data bars can be inverted by enabling Invert if Negative under format data series.
This can be achieved in XlsIO, using InvertIfNegative property of ChartSerieImpl class.
Invert if negative using XlsIO
Code snippet to set invert if negative
//Set invert if negative
(chart.Series[1] as ChartSerieImpl).InvertIfNegative = true;
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 invert if negative 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 invert if negative to second series
(chart.Series[0] as ChartSerieImpl).InvertIfNegative = false;
(chart.Series[1] as ChartSerieImpl).InvertIfNegative = true;
(chart.Series[2] as ChartSerieImpl).InvertIfNegative = false;
//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
Imports Syncfusion.XlsIO.Implementation.Charts
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 invert if negative to second series
CType(chart.Series(0), ChartSerieImpl).InvertIfNegative = False
CType(chart.Series(1), ChartSerieImpl).InvertIfNegative = True
CType(chart.Series(2), ChartSerieImpl).InvertIfNegative = False
'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
