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POHow to build a tree control with JSON and jQuery
 

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    <p>I have a web page on which I would like to display dynamically a tree based on a JSON array with the help of jQuery. Each node of my tree has a checkbox associated to it. When I click a node which has children, I would like all of them to be checked. I’ve already taken care of printing the tree and the checkboxes and I am now trying to select children nodes and I am not able.</p> <p>Below is the code (simplified) that I have so far. Does anybody has an idea how I could automatically check the children checkboxes when a checkbox is checked with jQuery?</p> <p>Thanks!</p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;script type="text/javascript" src="jquery-1.3.2.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript"&gt; var myJSON = { "d": { "__type": "Branch", "Name": "$", "FullPath": "$\\$", "SubBranch": [ { "__type": "Branch", "Name": "System", "FullPath": "$\\System", "SubBranch": [ { "__type": "Branch", "Name": "Library", "FullPath": "$\\System\\Library", "SubBranch": [ ] }, { "__type": "Branch", "Name": "Configuration", "FullPath": "$\\System\\Configuration", "SubBranch": [ { "__type": "Branch", "Name": "Reimage", "FullPath": "$\\System\\Configuration\\Reimage", "SubBranch": [ ] }, { "__type": "Branch", "Name": "Installation", "FullPath": "$\\System\\Configuration\\Installation", "SubBranch": [ ] } ] }, ] } ] } } var output; var indentationLevel = 0; function GetSpacing(numberOfSpaces) { var tabs = ''; for (i = 0; i &lt; numberOfSpaces; i++) { tabs += '&amp;nbsp;&amp;nbsp;&amp;nbsp;'; } return tabs; } function GetHtmlForFeaturePath(featurePath) { return '&lt;div&gt;' + GetSpacing(indentationLevel) + '&lt;input type="checkbox" id="' + featurePath.FullPath + '" class="featureTreeCheckbox" /&gt;' + featurePath.Name + "&lt;/div&gt;"; } function GetHtmlForFeaturePaths(node) { output += GetHtmlForFeaturePath(node); indentationLevel++; jQuery.each(node.SubBranch, function() { GetHtmlForFeaturePaths(this); }); indentationLevel--; } String.prototype.startsWith = function(str) { return this.match("^" + str) == str; } window.onload = function() { GetHtmlForFeaturePaths(myJSON.d); document.writeln(output); /* How do I tell a node to check its children? */ $('input').click(function(event) { var clickedControlId = this.id; alert(clickedControlId); /* alert($.grep(myJSON.d, function (a) { return a.FullPath == clickedControlId })); */ }); } &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;a href="http://jquery.com/"&gt;jQuery&lt;/a&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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