Generating LayerLegendInfo for Custom Renderer

Question

Hello!

New member, been using esri silverlight API for several months now, but have run into issue.

I have a custom renderer, inheriting from IRenderer, and ILegendSupport.  It works fine, except I can get symbols to display in legend.  I'm using the toolkit legend.

Basically, in QueryLegendInfos, i am creating LayerLegendInfo to send to callback.  LayerLegendInfo has member LegendItemInfo, which has ImageSource property for symbol.  I have my symbol defined in XAML, and ImageSource is expecting bitmap, so how can I convert my symbol to bitmap to assign to ImageSource?

Everything currently works, its in legend, shows label, but no symbol because I'm not sure what to do.  Taking suggestions.  If someone willing to post example custom renderer with legend support for reference, that would be ideal.

Thanks.

christophermire · Answer

Thanks.  Ended up using a classbreaks renderer with custom clusterer, but I found your posts useful.

DominiqueBroux · Answer

Thanks for example.

Is there a way to take esri symbol and generate bitmap from it?

You can create a SimpleRenderer with the esri symbol and call QueryLegendInfos on this renderer to get the bitmap.

To do it with a list of symbols at once, yo can use an UniqueValueRenderer populated with your symbols and labels, and just call QueryLegendInfos on this renderer.

christophermire · Answer

Thanks for example.

Is there a way to take esri symbol and generate bitmap from it?