.... about UniqueValueRenderer

Question

Hi , i would like to set UniqueValueRenderer by code , to create a thematic map on a layer dinamically. I tried to do this .... non errors but no result on map. Please help me to find be the mistake 🙂 thank u GP ******************** xaml code behind code: UniqueValueRenderer uvl = new UniqueValueRenderer(); uvl.Attribute = "STATE_NAME"; UniqueValueInfo uvi = new UniqueValueInfo(); uvi.Value = "Arizona"; uvi.Symbol = LayoutRoot.Resources["MyRedFillSymbol"] as FillSymbol; uvl.Infos.Add(uvi); FeatureLayer f = new FeatureLayer(); f.ID = "MyFeatureLayerUnique"; f.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5"; f.Where = "STATE_NAME = 'Arizona'"; f.Renderer = uvl as UniqueValueRenderer; MyMap.Layers.Add(f);

MarcoRosa · Answer

it's true .... that was the error thanks jennifer.
See u 🙂

JenniferNery · Answer

I think what Dominique is trying to say is after this line does LayoutRoot.Resources["MyRedFillSymbol"] as FillSymbol;

return a symbol or null?

Most likely, you have Grid x:Name="LayoutRoot" and in your code-snippet, the symbol resources are defined higher at the UserControl level, which means you might need to do the following instead:uvi.Symbol = this.Resources["MyRedFillSymbol"] as FillSymbol;

MarcoRosa · Answer

hi dominique , the answer is yes