Declaring X-Axis and Y-Axis throught Data Binding is not working

[Adriano Machado]

Hi,

I'm evaluating Telerik RadControls for Silverlight Q3 2009 SP2 for building a system monitoring dashboard.  I'm having trouble setting X-Axis step, minimum and maximum values using a binding expression.  The error I get is: AG_E_PARSER_BAD_PROPERTY_VALUE [Line: 34 Position: 57] (it points to the "Step={Binding Path=Step}" portion of the code).

The entire XAML is as follow:

<UserControl x:Class="RadChartView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:telerikChart="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Charting"
             xmlns:telerikCharting="clr-namespace:Telerik.Windows.Controls.Charting;assembly=Telerik.Windows.Controls.Charting"
             mc:Ignorable="d"
             d:DesignWidth="640"
             d:DesignHeight="480">

    <telerikChart:RadChart x:Name="radChart"
                           ItemsSource="{Binding Path=ItemsSource}">
        <telerikChart:RadChart.DefaultView>
            <telerikCharting:ChartDefaultView>

                <telerikCharting:ChartDefaultView.ChartTitle>
                    <telerikCharting:ChartTitle Content="{Binding Path=Title}" />
                </telerikCharting:ChartDefaultView.ChartTitle>

                <telerikCharting:ChartDefaultView.ChartLegend>
                    <telerikCharting:ChartLegend x:Name="chartLegend" UseAutoGeneratedItems="True" Header="" />
                </telerikCharting:ChartDefaultView.ChartLegend>

                <telerikCharting:ChartDefaultView.ChartArea>
                    <telerikCharting:ChartArea LegendName="chartLegend">
                        <telerikCharting:ChartArea.AxisX>
                            <telerikCharting:AxisX AutoRange="False"
                                                   IsDateTime="True"
                                                   DefaultLabelFormat="hh:mm:ss"
                                                   LayoutMode="Normal"
                                                   LabelStep="2"
                                                   Title="Horário"
                                                   Step="{Binding Path=STEP}"
                                                   MaxValue="{Binding Path=MAXVALUE}"
                                                   MinValue="{Binding Path=MINVALUE}"
                                                   LabelRotationAngle="-45">
                            </telerikCharting:AxisX>
                        </telerikCharting:ChartArea.AxisX>
                    </telerikCharting:ChartArea>
                </telerikCharting:ChartDefaultView.ChartArea>

            </telerikCharting:ChartDefaultView>

        </telerikChart:RadChart.DefaultView>
    </telerikChart:RadChart>

</UserControl>

The data context is set to a viewmodel class, containing the data to be used.

Can someone point me what I am missing?

Thanks.

[Ves]

Hello Adriano Machado,

I am afraid, this is a limitation imposed by the Silverlight framework. In Silverlight the binding target can be a DependencyProperty of a FrameworkElement only (not a DependencyObject) and the chart axes are generic DependencyObjects.

Silverlight 4 will loosen these restrictions on binding targets and we will certainly look into supporting this in one of the future versions of the control. Please, accept our apologies for the inconvenience caused.


Sincerely,
Ves
the Telerik team

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[Adriano Machado]

Is there any way to overcome this limitation by, for instance, implementing an event handler or using a data behavior, such as those available at http://expressionblend.codeplex.com ?