Should Not include Basemap layer in Legend

Question

Hello,

I have an issue about Legend. In my application i'm using basemap gallery.After map load base map is appears in legend. How to hide the basemap layer in legend. I tried the hidelayers concept (legend is not working), but no luck. Below i add the sample code and image.Anybody have solution for this?

var legend = new esri.dijit.Legend({
       map : map,
     layerInfos: [{hideLayers: baseMapLayer}]
     }, "legendDiv");
      legend.startup();

I used  updateLayerVisibility() method for layers on/off.

Thanks

[ATTACH=CONFIG]26643[/ATTACH]

legend.JPG

upendrapaladugu · Answer

Thanks to Ken Buja and Jason Zou for reply.

As per the requirement we used the services like the above.

I wrote one function for delete the basemap layer in legend. It's working fine on load the application.

I used this function map onLoad function. But the problem is after change the basemap layer , the basemap layer displays in legend. Is there any event for basemap layer change event. I tried in

dojo.forEach(basemapGallery.basemaps, function (basemap) {
//Add a menu item for each basemap, when the menu items are selected
   dijit.byId("bingMenu").addChild(new dijit.MenuItem({
   label : basemap.title,
   onClick : dojo.hitch(this, function () {
   this.basemapGallery.select(basemap.id);
   
   legendDisplay();
  
   })
   }));
   
   });

and

basemapGallery.on("selection-change", function(evt) {
   legendDisplay();
   });

and

dojo.connect(map, "onBaseChange", mapReady1);
    
 function mapReady1(map){
 
  bool=true;
 
   legendDisplay();
   
     }

The above three functions are inside init() only. 
Can you please suggest the solution for this...

Thanks 
Upendra

kenbuja · Answer

Have you also looked at the TOC widget that nlui has built?

JasonZou · Answer

Several thoughts about your code.
1. Seems like all the feature layers are from the same map service. If so, why load the whole map service instead of creating feature layer for each which is very expensive. Unless you want more controls to each layer, I would load the map service instead. In the map service, you can group the layers into group layers, and still control the layer visibility using the checkboxes you created via layer.setVisibleLayers().
2. I would use layer.hide() to turn off a layer instead of removing it from the map.
3. In the legend constructor, you haven't defined the layerInfos. Since the API does not provide a way to update the layerInfos, all the layers (feature layers, basemap layer and any other layers) must be loaded first before creating the legend.