When I build chart in code BuildChart() always runs twice.

I always build my charts in code. I have noticed that the way I build charts the private method Chart.BuildChart() always runs twice, which seems like a potential performance issue. The following simple program demonstrates this:

<Window x:Class="ChartTest2.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ms="http://namespaces.mindscape.co.nz/wpf"
    Title="MainWindow" Height="350" Width="525">
<Grid x:Name="grid">
    <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <ms:Chart x:Name="chart"/>
    <Button Grid.Row="1" Content="Add Series" Width="100" Click="btnAddSeries_Click"/>
</Grid>

C# code:

using System;
using System.Windows;
using Mindscape.WpfElements.Charting;
namespace ChartTest2
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        Random rand = new Random();
        private void btnAddSeries_Click(object sender, RoutedEventArgs e)
        {
            BarSeries bs = new BarSeries();
            bs.ItemsSource = new double[] { rand.Next(10), rand.Next(10), rand.Next(10), rand.Next(10) };
            chart.Series.Add(bs);
        }
    }
}

Every time the Add Series button is clicked the BuildChart executes twice (of course you need to set an appropriate break point or Console.WriteLine to observe).

While this isn't such a big deal, I was wondering if anything can be done to avoid building the chart twice.

Peter

Thanks Peter

It is difficult to get the call count down to 1 in all scenarios and is something we have improved a lot since the first version. We will certainly be looking through this again in the next performance iteration early this year.

Jason Fauchelle