Problem retrieving data from JSON file in windows gadget

Question

I am trying to access data stored in a JSON file (in the same folder as the gadget) using jquery. The following example works fine in both firefox and internet explorer (shows "success"), but as a gadget it doesn't work (shows "fail").

$('#gadgetContent').html("fail");

$.getJSON("test.json", function(data) {

    $('#gadgetContent').html("success");
});

Any ideas as to what I'm doing wrong? Thanks.

UPDATE:

$.ajax({
    url: "test.json",
    dataType: 'json',
    error: jsonError,
    success: jsonSuccess
});

function jsonError(jqXHR, textStatus, errorThrown) {

    // As a gadget this function is called
    // jqXHR.readyState is 4
    // jqXHR.status is 0
    // jqXHR.responseText is undefined
}

function jsonSuccess(data) {
    // Browsers reach here
}

Answer 1

You should read the file like text and then convert it to json. This utility should help you:

    function getJsonFromFile(fileName) {
        var fso = new ActiveXObject("Scripting.FileSystemObject");
        if (fso.FileExists(fileName)) {
                var f = fso.OpenTextFile(fileName, 1);
                var jsonStr = "";
                while (!f.AtEndOfStream) {
                    jsonStr += f.ReadLine();
                }
                f.Close();
        }

        return jQuery.parseJSON(jsonStr);
    }

Remember to call it with full path like:

var gadgetPath = System.Gadget.path;
var jsonFile = gadgetPath + "\\" + "foo.json";

var json = getJsonFromFile(jsonFile);