Add a "%" symbol with Excel Interop

Question

Hello folks!
How do I programmatically put a "%" symbol to a column in the Excel chart. I am using Excel Interop library.
Any advice will be appreciated!

Answer 1

I am working on wpf desktop application in which I am using C# 4.0 and MVVM design pattern. The app generates several Excel reports and I am using Microsoft.Office.Interop.Excel.dll library to export data from wpf app to excel file. I have found that the
Microsoft.Office.Interop.Excel.dll library is a good choice for dealing with Excel files. Below is the code I am using to generate the chart above. 
private void CreateChart(string[] xValues, double[] yValues)
var xlCharts = (Excel.ChartObjects)_sheet.ChartObjects(Type.Missing);
var myChart = (Excel.ChartObject)xlCharts.Add(48, 241, 750, 400);
var chartPage = myChart.Chart;
chartPage.HasLegend = false;
chartPage.ChartType = Excel.XlChartType.xlColumnClustered;
chartPage.ChartStyle = 4;
var seriesCollection = chartPage.SeriesCollection();
var series1 = seriesCollection.NewSeries();
series1.Name = MetroNew.Localization.Properties.Resources.ReportFractionTitle;
series1.XValues = xValues;
series1.Values = yValues;
var vertAxis = (Axis)chartPage.Axes(XlAxisType.xlValue, XlAxisGroup.xlPrimary);
vertAxis.HasMajorGridlines = true;
vertAxis.MaximumScaleIsAuto = false;
vertAxis.MaximumScale = 100;
vertAxis.MinimumScaleIsAuto = false;
vertAxis.MinimumScale = 0;
var pointsCount = series1.Points().Count;
Color color;
for (int i = 1; i <= pointsCount; i++)
if (i <= 50)
color = Color.FromName(i.GetColorByName());
else
var rnd = new Random();
int index = rnd.Next(1, 50);
color = Color.FromName(i.GetColorByName());
series1.Points(i).Interior.Color = color;
var axis = (Axis)chartPage.Axes(
Excel.XlAxisType.xlValue,
Excel.XlAxisGroup.xlPrimary);
axis.HasTitle = true;
axis.AxisTitle.Text = MetroNew.Localization.Properties.Resources.ReportFractionContentTitle;
series1.ApplyDataLabels(
Excel.XlDataLabelsType.xlDataLabelsShowLabel,
true, true, true, false, false, true, true,
true, true);