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Keith
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Formatting DataPoint value in ToolTip set from Series.DataPointStyle.
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I'd like to set the tooltip for the datapoints in a series at the Series level using the DataPointStyle property and format the values using the same manner as I do with labels (http://help.infragistics.com/Help/NetAdvantage/DV/2009.1/CLR3.X/html/SL_DV_xamWebChart_Format_the_Labels_of_an_Axis.html).

But, when I try something like "{}{0:c}" in the ToolTip property, I get that literal value "{}{0:c}" as my tooltip instead of the formatted value.  Is there a way to reference the Value of the DataPoint in the DataPointTemplate style?  Here's what I'm trying now:

<UserControl.Resources>
        <Style x:Key="DataPointStyle1" TargetType="igChart:BarChartDataPointTemplate">
            <Setter Property="ToolTip" Value="{}{0:c}" />
        </Style>
    </UserControl.Resources>
    <Grid x:Name="LayoutRoot" >
        <igChart:XamWebChart x:Name="XamWebChart1" >
            <igChart:XamWebChart.Series>
                <igChart:Series ChartType="Bar" DataPointStyle="{StaticResource DataPointStyle1}" >
                    <igChart:Series.DataPoints>
                        <igChart:DataPoint Value="50" Label="Mark"  />
                        <igChart:DataPoint Value="40" Label="Joe" />
                    </igChart:Series.DataPoints>
                </igChart:Series>
            </igChart:XamWebChart.Series>
        </igChart:XamWebChart>
    </Grid>

I tried "{}{Binding Value}" as well, but that also just showed up as the literal string as the tooltip. 

Thanks,
Keith

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  • 28496
    Verified Answer
    Offline posted

    i don't think it's possible to achieve this using only XAML.  when the DataPoint.ToolTip property is set, the chart simply attaches it using code like this:

    TooltipService.SetTooltip(uielement, theDataPoint.Tooltip)

    hence no formatting is possible.

    I think the best way to solve this problem is by using C#:

    foreach (DataPoint point in mySeries.DataPoints)

    {

    point.Tooltip = new TextBlock() { Text = point.Value.ToString("0:c") };

    }

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