it's my code

            Axis customAxis = chart1.Axes.AddCustomAxis(AxisOrientation.Vertical, AxisPredefinedPosition.FrontRight);

            // Store the axis id
            customAxisId = customAxis.AxisId;

            customAxis.PositionOffset = 0;
            customAxis.ValueFormatting.Format = ValueFormat.CustomNumber;
            customAxis.ValueFormatting.CustomFormat = "P";

but it show like this xx.00%,I dont' want have tow 00 in the end ,how can i do?

many thanks

You can do it in one of the following two ways :

chart.Axis( StandardAxis.PrimaryY ).ValueFormatting.Format = ValueFormat.CustomNumber;

chart.Axis( StandardAxis.PrimaryY ).ValueFormatting.CustomFormat = "##0%";

//or

chart.Axis( StandardAxis.PrimaryY ).ValueFormatting.Format = ValueFormat.Percentage;

System.Globalization.CultureInfo cultureInfo = ( System.Globalization.CultureInfo )chart.Axis( StandardAxis.PrimaryY ).ValueFormatting.CultureInfo.Clone();

chart.Axis( StandardAxis.PrimaryY ).ValueFormatting.CultureInfo = cultureInfo;