Ext.net中TreePanel的Checkbox选中与不选中的控制解决办法

用Ext.net的TreePanel，加了几个checkbox到树里，结果发现不好控制checkbox的选中与非选中状态，后采用如下办法解决

 

var selNodes = TreePanel1.root.childNodes;
            var node;
            debugger;
            for (var i = 0; i < selNodes.length; i++) {
                for (var j = 0; j < selNodes[i].childNodes.length; j++) {
                                        if (result.length > 1) {
                                            if (result.indexOf(selNodes[i].childNodes[j].attributes.text) > 0) {
                                                selNodes[i].childNodes[j].ui.node.attributes.checked = true;
                                                selNodes[i].childNodes[j].ui.toggleCheck(true);//二行代码缺一不可
                                            }
                                            else {
                                                selNodes[i].childNodes[j].ui.node.attributes.checked = false;
                                                selNodes[i].childNodes[j].ui.toggleCheck(false );
                                            }

                                        }
                                        else {
                                            selNodes[i].childNodes[j].ui.node.attributes.checked = false;
                                            selNodes[i].childNodes[j].ui.toggleCheck(false);
                                        }

                }
            }