How to return a FeatureLayer with QueuedTask.Run

Amadeus111

I would like to refactor my code and implement a method instead of writing/copying the same code again again. 

I check TOC whether a certain Layer exists. If TOC does not have it I create the FeatureLayer. I use this process a lot in my applications. 

So, here is the method but it does not work

public Task<FeatureLayer> AddLayerToTOC(Uri layerUri, string layerName)
{
  return QueuedTask.Run(() =>
  {
    MainGridEnabled = false;

    FeatureLayer fLayer;
    TOCLayers = MapView.Active.Map.Layers;
    var TOCLayerNames = TOCLayers.Select(p => p.Name);

    if (TOCLayerNames.Contains(layerName) == false)
    {
     fLayer = LayerFactory.Instance.CreateFeatureLayer(layerUri, MapView.Active.Map, 0, layerName);
    }

    else
    {
       foreach (Layer layer in TOCLayers)
       {
          if (layer.Name == layerName)
          {
             fLayer = layer as FeatureLayer;;
          }
       }
  }

    MapView.Active.ZoomToSelected();

    MainGridEnabled = true;

    return fLayer;
    });
}

 

I get CS0165: Use of unassigned local variable

Problem coming from else {} part because VS thinks fLayer not assigned but I will do that while application is running. 

Is there a solution to this or another way of doing it? 

GKmieliauskas

Hi,

It is simple. Set it to null:

FeatureLayer fLayer = null;