Set another controller scope variable without using angular.element (Angularjs)

You should create a service, then inject it to both of your controller, then save and retrieve your Entities in that service

You need to use an object in order to do two-way data binding. Two way data binding is not work with primitive type.

Do following changes.

app.controller('MyController', function () {

  this.Entity = {EntityId:0,EntityType:0};

  this.LoadFiles = function (objEntity){
       this.Entity.EntityId = objEntity.EntityId;
       this.Entity.EntityType  = objEntity.EntityType;
  }
});

HTML :

<div ng-controller="MyController as MC" id="div1">
    <a href="#" id="1" ng-init="MC.Entity.EntityId = 1 , MC.Entity.EntityType = 57" ng-click="MC.LoadFiles(MC.Entity)" title="Upload">Upload </a>    
</div>

HTML Div2

<div ng-controller="MyController as MC" id="div2">                                                                                                                   
     EntityId = {{MC.Entity.EntityId}}, EntityType = {{MC.Entity. ntityType}}                                                                                                      
</div>

EDIT :

<div ng-controller="MyController as MC" id="div1">
    <a href="#" id="1"  ng-click="MC.LoadFiles(MC.Entity)" title="Upload">Upload </a>    
</div>

<div ng-controller="MyController as MC" id="div2">                                                                                                                   
     EntityId = {{MC.Entity.EntityId}}, EntityType = {{MC.Entity. EntityType}}                                                                                                      
</div>

Controller :

controller('MyController', function () {

  this.Entity = {EntityId:1,EntityType:57};

  this.LoadFiles = function (objEntity){
       this.Entity.EntityId = objEntity.EntityId;
       this.Entity.EntityType  = objEntity.EntityType;
  }
})

Plunker check