How do you display data points in percentage format using mschart in c#

Question

I have been trying to display percentage for my data points in ms chart in this format 00.00%. I can not figure out how.

I used this for my series label

chart1.Series[1].Label = "#PERCENT";

and it turns out like this on the chart, the values are not displaying correctly.

The data is coming from a data table and this is how I am populating the chart

 //Chart data points
                foreach(DataRow r in dt.Rows)
                {
                    object wk = (r["week_num"]).ToString();
                    object fpy = (r["fpy"]); // First pass yield percentage
                    object thrput = (r["throughput"]).ToString();

                    chart1.Series[0].Points.AddXY(wk, thrput);
                    chart1.Series[1].Points.AddXY(wk, fpy);
                }

I am not sure how to correct format the data points in the line graph to display the correct value and in the percentage format.

Any suggestions?

EDIT:

if I remove this line

chart1.Series[1].Label = "#PERCENT";

The values are correct but not in percentage format

So you want a leading 0? For example 04.21%. Please clarify "not correctly" — Saragis

Rachel Gallen Rachel Gallen · Accepted Answer · 2015-08-11T15:43:02

You will have to format the Label style

Try chart.ChartAreas.AxisX.LabelStyle.Format = "{00:00}"

actually you may have to customise the percent specifer

i think its' set to just show one number (before the point) by default

e.g.

double value = .086;
Console.WriteLine(value.ToString("#0.##%", CultureInfo.InvariantCulture));
Console.WriteLine(String.Format(CultureInfo.InvariantCulture, 
                                "{0:#0.##%}", value));
// Displays 8.6%

you will have to override it and put in an extra zero

How do you display data points in percentage format using mschart in c#

2 Answers