knockout checkbox 全选

 <input type=checkbox data-bind="checked:IsAll"/>全选
 <ul  data-bind="foreach: report">
            <li><input type="checkbox" name="re"  data-bind="value:key,checked:$parent.All" />
            <span data-bind="text: name"></span></li>
        </ul>

 viewModel = {  report: ko.observableArray([]),All: ko.observableArray([]), IsAll: ko.observable(false)};

 $(function () {
            ko.applyBindings(viewModel);
            viewModel.IsAll.subscribe(function () {
                if (!viewModel.IsAll()) { viewModel.All.removeAll(); }
                else {
                    viewModel.All.removeAll();
                    $.each(viewModel.Current(), function (i, j) {  viewModel.All.push(j); })
                }
            }, null, "change");
        })

viewModel.report.push({ key: SSO.key, name: SSO.value });