Toggle between two layers in c# server application

ManojrajTeli

I have difficulty regarding the toggling between two layers as i have many layers in my application and i want to toggel betweeen basemap and imagery in my project using two radio button.Please as soon as possible And thank You in advance,

MarioObendorfer

Hi,

try to link your checkboxes or whatever you use with an event handler ... e.g. 'checkchange'. If you have a dynamic TOC you should give each TOC entry an id, in this case best id is the service id. Save alle services/layers in an array. If checkchange fires you can do something like this:

//Listener on an ExtJS Component
listeners: {
        'checkchange': function(node, checked){
            if(checked){
                node.getUI().addClass('complete');
  var size = node.parentNode.childNodes.length;
  for(var i=0;i<size;i++) {
   if(node.parentNode.childNodes.id != node.id) {
    node.parentNode.childNodes.ui.checkbox.checked = false;
    Ext.getCmp('mappanel).setLayerVisibility(node.parentNode.childNodes.id, false);
   }else {
    Ext.getCmp('mappanel).setLayerVisibility(node.id, true);
   }
  }
           }else{
                node.getUI().removeClass('complete');
           }
       }
}

//function definition in ExtJS
setLayerVisibility: function(id, visible) {
    var size = this.oLayer.length; //in this array all layers/services are saved
   for(var i=0;i<size;i++) {
 if(this.oLayer.id == id) {
  if(visible)
   this.oLayer.show();
  else
   this.oLayer.hide();
 }
   }
}

With this example you activate only one layer/service at a time ... i just c&p parts from an ExtJS  sample of mine and didn't alter it to a common example ... you might have to change some parts.

Summary ... give TOC an evhandler and show/hide layers linked via id to the TOC.

Hope that helps a little bit ... greets Tol