Disappearing Legend

Hi there,

The legend is a totally separate control, not part of SciChart. If you look at the example it is declared in a parent Grid, below the chart in the grid (which puts it higher in the Z-order). E.g. the structure is:

<Grid>
   <s:SciChartSurface>
      <s:SciChartSurface.ChartModifier>
          <s:LegendModifier x:Name="legendSource"/>
      </s:SciChartSurface.ChartModifier>
   </s:SciChartSurface>
   
   <s:SciChartLegend LegendData="{Binding LegendData,
                                                      ElementName=legendSource,
                                                      Mode=OneWay}"/>
</Grid>

The legend can actually be placed anywhere in your application, so long as it can bind to the LegendModifier which acts as a data-source. Think of the LegendModifier as a ViewModel in this case and Legend as a view.

So — to place it above the chart, just make sure its in a grid over the chart. We give it a margin to inset it slightly.

Yes, you will need one legend per chart as each one consumes data from the LegendModifier which must be present on the chart. Of course you could have one legend and re-bind it to each chart one at a time. So long as you’re prepared to do the logic to update the binding then this is also a possibility.

Best regards,
Andrew

I figured out what the issue was. My implementation was almost correct the first time except the Z order assumption, so because my legend was declared first, the graph itself was building over the legend. Forcing a Z Index worked like a charm. Thanks for your help.