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Question

How to pragmatically create BubbleSeries in SL4

Answer 1

A:

Modify getGridData to return List<Dictionary<string, object>> and ensure the numeric values are added the dictionary using a numeric type such as int or double.

Edit

It may be easier to use a concrete example, here is some test code:-

public partial class BubbleTest : UserControl
{
    public BubbleTest()
    {
        InitializeComponent();
        Loaded += new RoutedEventHandler(BubbleTest_Loaded);
    }

    void BubbleTest_Loaded(object sender, RoutedEventArgs e)
    {
        var s1   = new BubbleSeries(); 
        s1.DependentValueBinding = new Binding("[dependent]"); 
        s1.SizeValueBinding = new Binding("[size]"); 
        s1.IndependentValueBinding = new Binding("[independent]"); 
        s1.ItemsSource = GetGridData(); 
        s1.Title = "Chart";
        ChartVis.Series.Add(s1);

    }

    private List<Dictionary<string, object>> GetGridData()
    {
        List<Dictionary<string, object>> gridData = new List<Dictionary<string, object>>();

        gridData.Add(CreateBubbleEntry("First", 10.0, 5.0));
        gridData.Add(CreateBubbleEntry("Second", 20.0, 10.0));

        return gridData;
    }

    private Dictionary<string, object> CreateBubbleEntry(string independent, double dependent, double size)
    {
        var item = new Dictionary<string, object>();
        item.Add("independent", independent);
        item.Add("dependent", dependent);
        item.Add("size", size);
        return item;
    }
}

The Xaml for this user control is as you have it:-

<UserControl x:Class="SilverlightApplication1.BubbleTest"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit"
>   
    <Grid x:Name="LayoutRoot" Background="White">
        <toolkit:Chart Title="Visaulization" Grid.Column="0" x:Name="ChartVis">
            <toolkit:Chart.Series>
            </toolkit:Chart.Series>
        </toolkit:Chart>
    </Grid>
</UserControl>

The above works so whatever you are actually doing will vary in some way.

AnthonyWJones 2010-09-20 11:51:33

I did as you suggested but I get still an error. This time I get System.InvalidOperationException: Message: Unhandled Error in Silverlight Application Code: 4004 Category: ManagedRuntimeError Message: System.InvalidOperationException: Assigned dependent axis cannot be used. This may be due to an unset Orientation property for the axis or a type mismatch between the values being plotted and those supported by the axis. at System.Windows.Controls.DataVisualization.Charting.DataPointSeriesWi

Skarab 2010-09-22 09:00:46

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How to pragmatically create BubbleSeries in SL4

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