Hi,

Could you please either provide the stack trace from that exception or a sample project that replicates the issue. There are a bit too many moving parts to make any conclusions from your description alone.

Thanks,

Graham

Hi,

I'm currently evaluating the DataChart control (Silverlight). I'm running in the same problem.
I have downloaded a sample (RIA services and the IGSample database). The sample works but when I try with my own database the above error shows up. It seems that the error happens in the
DateTime axis:

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at Infragistics.Controls.Charts.CategoryDateTimeXAxis.RenderAxis(Boolean animate)
   at Infragistics.Controls.Charts.Axis.PropertyUpdatedOverride(Object sender, String propertyName, Object oldValue, Object newValue)
   at Infragistics.Controls.Charts.CategoryAxisBase.PropertyUpdatedOverride(Object sender, String propertyName, Object oldValue, Object newValue)
   at Infragistics.Controls.Charts.CategoryDateTimeXAxis.PropertyUpdatedOverride(Object sender, String propertyName, Object oldValue, Object newValue)
   at Infragistics.Controls.Charts.Axis.<.ctor>b__4(Object o, PropertyUpdatedEventArgs e)
   at Infragistics.Controls.Charts.Axis.RaisePropertyChanged(String name, Object oldValue, Object newValue)
   at Infragistics.Controls.Charts.Axis.<.cctor>b__25(DependencyObject sender, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue)
   at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet)
   at Infragistics.Controls.Charts.Axis.set_Label(Object value)

Sometimes that error also shows up in the designer (load error).

The difference to the IGSample database is that I have DateTime values (contain date and time values) and roughly 40000 records. I have no idea which index is wrong. The RIA service seems to work (if I use the data grid I can page through all values easily).

By the way - posting to this site does not work with ie9 - I had to use firefox ;-)

Hi,

Before we get started, have you tried this with the latest service release? This has the sound of an error that was in the RTM version of the axis that has since been resolved.

-Graham

Hi Graham,

I have downloaded the trials just a few days ago. The InfragisticsSL4.Controls.Charts.XamDataChart.v10.2.dll shows 10.2.20102.1029 as the file version....

The trial represents the RTM version of the chart where the issue existed. If I can reproduce the issue here I'll see if I can find you a work around for that version. I may not be recalling correctly, but I don't think this issue occurred if the chart initially had some data assigned to it. When you are using RIA services, because the access is asynchronous, you create a case where the chart is displayed before there is data assigned to it. I believe the initial version of the CategoryDateTimeXAxis may have had some issues with this scenario in some situations. You could also try deferring the initial display of the chart until you are notified that the data has arrived. Also, the CategoryXAxis does not exhibit this error, if it is possible to use that axis for your evaluation.

-Graham

Here's one way to go about working around the issue with the RTM build. It displays a loading splash in place of the chart until the data is ready.

The Xaml:

<UserControl.Resources>
        <local:TestData x:Key="data" />
        <local:VisibilityConverter x:Key="visibilityConverter" />
    </UserControl.Resources>

    <Grid x:Name="LayoutRoot" Background="White">
        <Border Background="Gray" 
                Visibility="{Binding Source={StaticResource data}, Path=IsLoading, Converter={StaticResource visibilityConverter}}" >
            <TextBlock VerticalAlignment="Center"
                       HorizontalAlignment="Center"
                       Text="Loading"
                       Foreground="White"
                       FontSize="40"
                       />
        </Border>

        <igChart:XamDataChart x:Name="theChart" 
                              Visibility="{Binding Source={StaticResource data}, Path=IsLoaded, Converter={StaticResource visibilityConverter}}">
            <igChart:XamDataChart.Axes>
                <igChart:NumericYAxis x:Name="yAxis" />
                <igChart:CategoryDateTimeXAxis x:Name="dateAxis"
                                               DateTimeMemberPath="Date"
                                               Label="{}{Date:MM/dd/yy hh:mm:ss}"
                                               ItemsSource="{StaticResource data}"/>
            </igChart:XamDataChart.Axes>
            
            <igChart:XamDataChart.Series>
                <igChart:LineSeries x:Name="lineSeries"
                                    XAxis="{Binding ElementName=dateAxis}"
                                    YAxis="{Binding ElementName=yAxis}"
                                    ItemsSource="{StaticResource data}"
                                    ValueMemberPath="Value"
                                    />
            </igChart:XamDataChart.Series>
        </igChart:XamDataChart>
    </Grid>

And the code behind:

public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
            ThreadStart start =
                new ThreadStart(DoAddData);
            Thread thread = new Thread(start);
            thread.Start();
        }

        public void DoAddData()
        {
            System.Threading.Thread.Sleep(5000);
            Dispatcher.BeginInvoke(
                AddData);
        }

        public void AddData()
        {
            var testData = Resources["data"] as TestData;

            testData.Add(
                new TestDataItem()
                {
                    Date = DateTime.Now.AddDays(-5),
                    Value = 1
                });
            testData.Add(
                new TestDataItem()
                {
                    Date = DateTime.Now.AddDays(-4),
                    Value = 2
                });
            testData.Add(
                new TestDataItem()
                {
                    Date = DateTime.Now.AddDays(-3),
                    Value = 3
                });
            testData.Add(
                new TestDataItem()
                {
                    Date = DateTime.Now.AddDays(-2),
                    Value = 4
                });
            testData.Add(
                new TestDataItem()
                {
                    Date = DateTime.Now.AddDays(-1),
                    Value = 5
                });
            testData.IsLoading = false;
            testData.IsLoaded = true;
        }
    }

    public class VisibilityConverter
        : IValueConverter
    {

        public object Convert(
            object value, 
            Type targetType, 
            object parameter, 
            System.Globalization.CultureInfo culture)
        {
            if (value is bool && targetType == typeof(Visibility))
            {
                if ((bool)value)
                {
                    return Visibility.Visible;
                }
                else
                {
                    return Visibility.Collapsed;
                }
            }

            return null;
        }

        public object ConvertBack(
           object value, 
           Type targetType, 
           object parameter, 
           System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public class TestData
        : ObservableCollection<TestDataItem>
    {
        public TestData()
        {
            IsLoaded = false;
            IsLoading = true;
        }

        private bool _isLoading;
        public bool IsLoading
        {
            get { return _isLoading; }
            set
            {
                _isLoading = value;
                OnPropertyChanged(
                    new PropertyChangedEventArgs("IsLoading"));
            }
        }

        private bool _isLoaded;

        public bool IsLoaded
        {
            get { return _isLoaded; }
            set
            {
                _isLoaded = value;
                OnPropertyChanged(
                    new PropertyChangedEventArgs("IsLoaded"));
            }
        }
    }

    public class TestDataItem
    {
        public DateTime Date { get; set; }
        public double Value { get; set; }
    }

Hope this helps! Let me know if you have any questions.

-Graham

Which version are you running, and which is the exception that you get? Are you making sure that any interaction with the chart is marshalled through the chart's Dispatcher?

-Graham