Building JSON Tree Structure in jQuery

Building JSON Tree Structure in jQuery

In this post we will show you how to build the sample JSON object and from that how to build the tree structure.

Creating Sample JSON

var jsonData = [];

var item0 = {};

item0.ID = '100', item0.Title = 'Manager', item0.Department = 'IT', item0.Location = 'Hyderabad';

var item1 = {};

item1.ID = '101', item1.Title = 'Ramakrishna Basagalla', item1.Department = 'IT', item1.Location = 'Hyderabad', item1.Lead = '100';

var item2 = {};

item2.ID = '102', item2.Title = 'Praveenkumar Basagalla', item2.Department = 'BS', item2.Location = 'Bangalore', item2.Lead = '100';

var item3 = {};

item3.ID = '103', item3.Title = 'Indraneel', item3.Department = 'IT', item3.Location = 'Hyderabad', item3.Lead = '101';

var item4 = {};

item4.ID = '104', item4.Title = 'Neelohith', item4.Department = 'IT', item4.Location = 'Hyderabad', item4.Lead = '101';

var item5 = {};

item5.ID = '105', item5.Title = 'Pavan', item5.Department = 'BS', item5.Location = 'Bangalore', item5.Lead = '102';

jsonData[0] = item0, jsonData[1] = item1, jsonData[2] = item2, jsonData[3] = item3, jsonData[4] = item4, jsonData[5] = item5;

Function to build Tree structure JSON

var BuildTreeStructure = function () {
var treeJson = [];
var children = [];
// build tree structure.
for (i = 0; i < jsonData.length; i++) {
   var item = jsonData[i];
   var parentid = item.Lead;
   var id = item.ID;
   if (children[parentid]) {
      if (!children[parentid].children) {
         children[parentid].children = [];
      }
      children[parentid].children[children[parentid].children.length] = item;
      children[id] = item;
   }
   else {
      children[id] = item;
      treeJson[id] = children[id];
   }
}
return treeJson;
}

Calling the BuildTreeStructure function on page load

$(document).ready(function(){
var finaJson = BuildTreeStructure();
});

Output