How to set Checkbox by default checked in treeview - kendo-ui

Question

I am trying to set treeview with checkbox and there are some check box are by default checked , here my data source value:-
[{"id":12,"Name":"Shirts","hasChildren":false,"Checked":true}
,{"id":13,"Name":"Jeans","hasChildren":false,"Checked":false},
{"id":14,"Name":"Shoes","hasChildren":false,"Checked":true},
{"id":15,"Name":"Apparel accessories","hasChildren":false,"Checked":false}]
and my view page code:--
$(document).ready(function() {
$("#category-treeview").kendoTreeView({
dataSource: categories,
dataTextField: "Name",
checkboxes: true
});
});
but i no one checkbox is selected why?
Can any advice how to solve this?
Regards,
vinit

Answer 1

Your code is basically correct. The only problem is that Checked needs to be checked (lowercase). Your data would look like:
var categories = [
{"id":12,"Name":"Shirts","hasChildren":false,"checked":true},
{"id":13,"Name":"Jeans","hasChildren":false,"checked":false},
{"id":14,"Name":"Shoes","hasChildren":false,"checked":true},
{"id":15,"Name":"Apparel accessories","hasChildren":false,"checked":false}
];
I put your code with this small change here: http://jsfiddle.net/OnaBai/78k2b/

Answer 2

If all you need to do is show whether the checkbox is checked or not, you can easily employ a templateFunction for the checkbox.
checkboxes: {
template: checkboxTemplate
}
And use a function something like
function checkboxTemplate(e) {
if(e.item.Checked) {
return "<input type='checkbox' checked='checked' />";
}
else {
return "<input type='checkbox' />";
}
}
The issue with this approach, is there isn't a two-way data-binding happening. So if you change a checkbox, and them dump the dataSource, that change isn't reflected.
If you are needing two-way data-binding, so you can post the changes back, you will need to employ something quite a bit more complicated. It is laid out pretty well in this SO post (Binding checkboxes in treeview with checkboxes that uses remote datasource).
I have looked for a more elegant answer to this, as it would seem fairly common, but haven't found anything yet.