Clearing Feature Layer

jaykapalczynski

I am populating a Feature Layer with the spatial features contained withing a Shapefile.

Attached is a snip of that code:  In that code I am assigning the shapefile to the Feature Layer "featureLayerSF"

Everything works fine and I can add the shapefiles.  Although in my case I only want to have one shapefile added at a time. 

My question is how do I remove the data inside "featureLayerSF" before the newly chosen shapefile spatial contents are added to the "featureLayerSF"

Any ideas would be very appreciated.  Or code snips....

Code.txt.zip

HeikoHeijenga

Store the layers you create in a (global) array:

...

allShapeFileLayers = [];

...

...

function addShapefileToMap(featureCollection) {

    var fullExtent;

    var layers = [];

    arrayUtils.forEach(allShapeFileLayers, function(layer) {

      map.removeLayer(layer);

    });

    arrayUtils.forEach(featureCollection.layers, function(layer) {

        var infoTemplateSF = new InfoTemplate("Details", "${*}");

        var featureLayerSF = new FeatureLayer(layer, {

            infoTemplate: infoTemplateSF

        });

        //associate the feature with the popup on click to enable highlight and zoom to

        featureLayerSF.on('click', function(event) {

            app.map.infoWindow.setFeatures([event.graphic]);

        });

        //change default symbol if desired. Comment this out and the layer will draw with the default symbology

        changeRenderer(featureLayerSF);

        fullExtent = fullExtent ?

            fullExtent.union(featureLayerSF.fullExtent) : featureLayerSF.fullExtent;

        layers.push(featureLayerSF);

    });

   allShapeFileLayers = layers;

    app.map.addLayers(layers);

    app.map.setExtent(fullExtent.expand(1.25), true);

    dom.byId('upload-status').innerHTML = "";

}