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RadChart with multiple data source support. In the example here you can see how to use the new ItemsSource property of the SeriesMapping.

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Andre asked on 23 Mar 2011, 08:24 PM

Hi guys,

Just tried the new Q1 2011 RadChart multiple data source support and got some errors.

When I notify my changes from the viewmodel to a RadChart with some data, I get a stackoverflow exception.
If the RadChart is created empty and I try to notify new data, nothing happens, the chart is not updated.

Am I doing something? Is this a bug?

Thanks in advance,

Here is my code (simplified):

MainPage.xaml

<StackPanel x:Name="LayoutRoot" Background="White">
        <Button Height="40" Content="Reload" Click="Button_Click"/>
        <telerikPresentation:RadChart UseDefaultLayout="False">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition />
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>
 
                <Charting:ChartTitle Content="Chart" />
                <Charting:ChartLegend Grid.Row="3" x:Name="legend" ItemsPanelOrientation="Horizontal" Header="Header"/>
                <Charting:ChartArea Grid.Row="1" Grid.RowSpan="2" x:Name="chartArea"/>
            </Grid>
            
            <telerikPresentation:RadChart.SeriesMappings>
                <Charting:SeriesMapping ChartAreaName="chartArea" ItemsSource="{Binding CurvaFaseA}">
                    <Charting:SeriesMapping.SeriesDefinition>
                        <Charting:LineSeriesDefinition ShowItemLabels="False" ShowPointMarks="False" />
                    </Charting:SeriesMapping.SeriesDefinition>
                    <Charting:SeriesMapping.ItemMappings>
                        <Charting:ItemMapping FieldName="Duracao" DataPointMember="XValue" />
                        <Charting:ItemMapping FieldName="Tensao" DataPointMember="YValue" />
                    </Charting:SeriesMapping.ItemMappings>
                </Charting:SeriesMapping>
 
                <Charting:SeriesMapping ChartAreaName="chartArea" ItemsSource="{Binding CurvaFaseB}">
                    <Charting:SeriesMapping.SeriesDefinition>
                        <Charting:LineSeriesDefinition ShowItemLabels="False" ShowPointMarks="True"/>
                    </Charting:SeriesMapping.SeriesDefinition>
                    <Charting:SeriesMapping.ItemMappings>
                        <Charting:ItemMapping FieldName="Duracao" DataPointMember="XValue" />
                        <Charting:ItemMapping FieldName="Tensao" DataPointMember="YValue" />
                    </Charting:SeriesMapping.ItemMappings>
                </Charting:SeriesMapping>
            </telerikPresentation:RadChart.SeriesMappings>
 
        </telerikPresentation:RadChart>
    </StackPanel>

MainPage.xaml.cs

public partial class MainPage : UserControl {
		private MainPageViewModel _viewModel;
 
		public MainPage() {
			InitializeComponent();
			_viewModel = new MainPageViewModel();
			DataContext = _viewModel;
		}
 
		private void Button_Click(object sender, RoutedEventArgs e) {
			_viewModel.Click();
		}
	}

And the ViewModel

public class MainPageViewModel : ViewModelBase {
		public List<GraficoCbemaItem> CurvaFaseA { get; set; }
		public List<GraficoCbemaItem> CurvaFaseB { get; set; }
 
		public MainPageViewModel() {
			//if you comment the next line, there is no exception but no data is reloaded too
			CurvaFaseA = CreateCurva().ToList();
		}
 
		private IEnumerable<GraficoCbemaItem> CreateCurva() {
			Random random = new Random(DateTime.Now.Millisecond);
			for (int i = 0; i < 50; i++) {
				yield return new GraficoCbemaItem(random.Next(100), random.Next(200));
			}
		}
		
		public void Click() {
			CurvaFaseA = CreateCurva().ToList();
			CurvaFaseB = CreateCurva().ToList();
			OnPropertyChanged(() => CurvaFaseA);
			OnPropertyChanged(() => CurvaFaseB);
		}
	}
 
	public class GraficoCbemaItem {
		public decimal Duracao { get; set; }
		public decimal Tensao { get; set; }
 
		public GraficoCbemaItem(decimal duracao, decimal tensao) {
			Duracao = duracao;
			Tensao = tensao;
		}
	}

RadChart with multiple data source support. In the example here you can see how to use the new ItemsSource property of the SeriesMapping.

4 Answers, 1 is accepted