llarsson

Please show a code snippet of what you mean

Modifying the "Using XValue and AxisXLabel" With AxisXLabel + XValue while drawing as a Line one gets the numeric values inbetween, playing with the interval doesn't help either

                <vc:Chart xmlns:vc="clr-namespace:Visifire.Charts;assembly=SLVisifire.Charts" Width="500" Height="300">
                    <vc:Chart.AxesX>
                        <vc:Axis Interval="10.0" />
                    </vc:Chart.AxesX>
                    <vc:Chart.Series>
                        <vc:DataSeries RenderAs="Line" LabelText="Test">
                            <vc:DataSeries.DataPoints>
                                <vc:DataPoint AxisXLabel="Jan" YValue="10" XValue="1" />
                                <vc:DataPoint AxisXLabel="Feb" YValue="20" XValue="5" />
                                <vc:DataPoint AxisXLabel="Mar" YValue="40" XValue="7" />
                                <vc:DataPoint AxisXLabel="Apr" YValue="50" XValue="12" />
                                <vc:DataPoint AxisXLabel="May" YValue="30" XValue="20" />
                            </vc:DataSeries.DataPoints>
                        </vc:DataSeries>
                    </vc:Chart.Series>
                </vc:Chart>

Edit: I wouldn't even want this serie to be visible

I solved it, when I explored it a bit more and tried to make a good example to post I found that it was a timing error and hence got a strange problem with working sometimes (very seldom) so it could be solved by waiting for the right component to be loaded before updating the data. New to silverlight but one could possible argue that the component could have solved this for me.

updated, it was the layout that made it not update except as described in first post that one needs to iterate (foreach) instead of collection assignment which I will consider a bug (yes make it read-only or fix the setter for the attribute)

XAML

      

  <vc:Chart xmlns:vc="clr-namespace:Visifire.Charts;assembly=SLVisifire.Charts" Name="chartDetails" 
                              Width="500" Height="300" BorderThickness="0" Theme="Theme1" 
                              View3D="False" ToolBarEnabled="True" Watermark="False" ScrollingEnabled="False" >
            <vc:Chart.AxesX>
                <vc:Axis Enabled="True">
                    <vc:Axis.Grids>
                        <vc:ChartGrid Enabled="True" />
                    </vc:Axis.Grids>
                </vc:Axis>
            </vc:Chart.AxesX>
            <vc:Chart.AxesY>
                <vc:Axis Enabled="True">
                    <vc:Axis.Grids>
                        <vc:ChartGrid Enabled="True" />
                    </vc:Axis.Grids>
                </vc:Axis>
             </vc:Chart.AxesY>
            <vc:Chart.Series>
                <vc:DataSeries Name="serie" RenderAs="Line" MarkerEnabled="True">
                </vc:DataSeries>
            </vc:Chart.Series>
        </vc:Chart>

C#

// First attempt

protected void UpdateDetailChart(DataPointCollection points) {
    serie.XValueType = ChartValueTypes.DateTime;
    serie.RenderAs = RenderAs.Line;
    serie.MarkerEnabled = true;

    foreach (DataPoint p in points)
    {
        serie.DataPoints.Add(p);
    }
}

// Another attempt

protected void UpdateDetailChart(DataPointCollection points) {
    DataSeries serie = new DataSeries();
    ... // same code as above
    chartDetails.Series.Clear();
    chartDetails.Series.Add(serie); 
}

Tried a lot of other stuff that didn't work either but this is what i really expected to work

Well the serie.DataPoints is of type DataPointCollection which extends ObservableCollection<DataPoint> and that would give compile error

But more importantly, why doesn't it update (re-render) sometimes not even when adding a new chart, is there any way to debug since there is no exceptions