Serialize Kendo Treeview Data in JSON

linush

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26 Aug 2013CPOL

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How to serialize a kendo treeview current view into JSON data

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Introduction

There are times that you may want to serialize your kendo treevew's view and store it somewhere so you can load it back later. This article provides a quick and simple way to serialize the treeview data by using a few lines of jQuery code.

Use Case

In our use case, we have a treeview with checkboxes to display heirarchical data. Users may select items they want in the treeview by checking the checkboxes and save them as part of their preference settings. Once it's saved, we also need to be able to load it back from the data.

Using the code

The test HTML code has just the treeview div section:

JavaScript

<body>
  <div id="treeview"></div>
</body>

The jQuery code is pretty simple too:

JavaScript

var ds = new kendo.data.HierarchicalDataSource({
    data: [{"text":"Item 1","id":"1","expanded":true,
      "checked":true,"items":[{"text":"Item 1.1",
      "id":"2","checked":true},{"text":"Item 1.2",
      "id":"3","checked":true},{"text":"Item 1.3",
      "id":"4","checked":true}]},{"text":"Item 2",
      "id":"5","expanded":true,"items":[{"text":"Item 2.1",
      "id":"6","checked":true},{"text":"Item 2.2",
      "id":"7"},{"text":"Item 2.3","id":"8",}]},
      {"text":"Item 3","id":"9"}]
});

var tv = $("#treeview").kendoTreeView({
    checkboxes: {
        checkChildren: true
    },
    dataSource: ds
}).data("kendoTreeView");


function treeToJson(nodes) {

    return $.map(nodes, function(n, i) {
    
        var result = { text: n.text, id: n.id, expanded: n.expanded, checked: n.checked };
    
        

        if (n.hasChildren)
            result.items = treeToJson(n.children.view());

        return result;
    });
}

var json = treeToJson(tv.dataSource.view()); 
console.log(JSON.stringify(json));

The function treetoJson() will loop through all the tree nodes and return the array of data in JSON.

You can test it on JS Bin. Make sure you include "Kendo UI" by clicking on the "Add Library" link.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Written By

linush

United States

Linus has more than 10 years of experience in designing and implementing enterprise scale applications. He is a seasoned architect in both J2EE and Microsoft technologies. He is also a Microsoft Certified Solution Developer for .NET.

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Serialize Kendo Treeview Data in JSON

Introduction

Use Case

Using the code

License

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