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[Solved] Chart blows up: Items collection must be empty before using ItemsSource

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Stuart asked on 08 Jun 2010, 01:59 PM

Hi

I'm currently evaluating the Telerik Silverlight chart control but I am struggling to display a fairly simple two series scatter plot using a logarithmic y axis and time scale x axis. My current (working) code is:

    
            <telerik:RadChart ItemsSource="{Binding Data}" > 
        
                            <telerik:RadChart.DefaultView> 
        
                                <telerik:ChartDefaultView> 
        
                                    <telerik:ChartDefaultView.ChartArea> 
        
                                        <telerik:ChartArea> 
        
                                            <!--<telerik:AxisY IsLogarithmic="True"/>--> 
        
                                            <!--<telerik:AxisX DefaultLabelFormat="HH:mm"/>--> 
        
                                        </telerik:ChartArea> 
        
                                    </telerik:ChartDefaultView.ChartArea> 
        
                                </telerik:ChartDefaultView> 
        
                            </telerik:RadChart.DefaultView> 
        
                            <telerik:RadChart.SeriesMappings> 
        
                                <telerik:SeriesMapping LegendLabel="Data">  
        
                                    <telerik:SeriesMapping.SeriesDefinition> 
        
                                        <telerik:ScatterSeriesDefinition/> 
        
                                    </telerik:SeriesMapping.SeriesDefinition> 
        
                                    <telerik:SeriesMapping.ItemMappings> 
        
                                        <telerik:ItemMapping DataPointMember="XValue" FieldName="Time"/>  
        
                                        <telerik:ItemMapping DataPointMember="YValue" FieldName="Ydata"/>  
        
                                    </telerik:SeriesMapping.ItemMappings> 
        
                                </telerik:SeriesMapping> 
        
                            </telerik:RadChart.SeriesMappings> 
        
                        </telerik:RadChart>

Trouble is as soon as I uncomment either of the commented axes lines shown above then the chart blows up with the message 'Items collection must be empty before using ItemsSource'

Has anyone got a fix for this?

Thanks

1 Answer, 1 is accepted

answered on 08 Jun 2010, 02:52 PM

Okay I've fixed my own problem by rearranging the code to

    
            <telerik:RadChart ItemsSource="{Binding Data}" > 
        
                            <telerik:RadChart.SeriesMappings> 
        
                                <telerik:SeriesMapping LegendLabel="Ydata">  
        
                                    <telerik:SeriesMapping.SeriesDefinition> 
        
                                        <telerik:ScatterSeriesDefinition/> 
        
                                    </telerik:SeriesMapping.SeriesDefinition> 
        
                                    <telerik:SeriesMapping.ItemMappings> 
        
                                        <telerik:ItemMapping DataPointMember="XValue" FieldName="Time"/>  
        
                                        <telerik:ItemMapping DataPointMember="YValue" FieldName="Ydata"/>  
        
                                    </telerik:SeriesMapping.ItemMappings> 
        
                                </telerik:SeriesMapping> 
        
                            </telerik:RadChart.SeriesMappings> 
        
                            <telerik:RadChart.DefaultView> 
        
                                <telerik:ChartDefaultView> 
        
                                    <telerik:ChartDefaultView.ChartArea> 
        
                                        <telerik:ChartArea> 
        
                                            <telerik:ChartArea.AxisX> 
        
                                                <telerik:AxisX DefaultLabelFormat="HH:mm"/>  
        
                                            </telerik:ChartArea.AxisX> 
        
                                            <telerik:ChartArea.AxisY> 
        
                                                <telerik:AxisY IsLogarithmic="True" MaxValue="2000"/>  
        
                                            </telerik:ChartArea.AxisY> 
        
                                        </telerik:ChartArea> 
        
                                    </telerik:ChartDefaultView.ChartArea> 
        
                                </telerik:ChartDefaultView> 
        
                            </telerik:RadChart.DefaultView> 
        
                        </telerik:RadChart>