[EXT.NET]前台JS获得store

var exportData = function() {
    var storejason = new Array();
    var store = GridPanel1.store;
    var count = store.data.length;
    if (count == 0) {
        storejason = null;
    }
    else {
        for (i = 0; i < count; i++) {
            var gridjason = {};
            gridjason["MainProduct"] = store.data.items[i].data.MainProduct;
            gridjason["ProductSeries"] = store.data.items[i].data.ProductSeries;
            gridjason["ProductModel"] = store.data.items[i].data.ProductModel;
            gridjason["Amount"] = store.data.items[i].data.Amount;
            gridjason["MID"] = store.data.items[i].data.MID;
            storejason.push(gridjason);
        }
    }
    return storejason;
};