Question

我正在将超过1000个节点（包括子节点）加载到dynatree中，并使用复选框为每个节点选择。

但是如果我们选择全部或者在演示中取消选择所有内容http://wwwendt.de/tech/dynatree/doc/sample-select.html，那么它很慢并且浏览器会挂起10秒钟。

有修复吗？

编辑：树有6-8个级别嵌套。每个级别有大约5-10个节点。

更新了代码

 <a href="#" id="select-all">select all</a>
 <div id="echoSelection"></div>
 <div id="my-tree"></div>

 $('#select-all').click(function(){
    alert($("#my-tree").dynatree("getRoot").length);
    $("#my-tree").dynatree("getRoot").visit(function(node){
            node.select(false);
        });
     return false;

});

 $("#my-tree").dynatree({
        initAjax: {
            url: 'jsonData.aspx',
            data: { type: "all" }
        },
        checkbox: true,
        selectMode: 3,
        onSelect: function (select, node) {
            // Display list of selected nodes
            var selNodes = node.tree.getSelectedNodes();
            // convert to title/key array
            var selKeys = $.map(selNodes, function (node) {
                return "[" + node.data.key + "]: '" + node.data.title + "'";
            });
            $("#echoSelection2").text(selKeys.join(", "));
        },
        onClick: function (node, event) {
            // We should not toggle, if target was "checkbox", because this
            // would result in double-toggle (i.e. no toggle)
            if (node.getEventTargetType(event) == "title")
                node.toggleSelect();
        },
        onKeydown: function (node, event) {
            if (event.which == 32) {
                node.toggleSelect();
                return false;
            }
        },

        fx: { height: "toggle", duration: 200 },
        autoCollapse: true
    });
}

JSON格式示例

[
{"title":"Node 1","isFolder":false,"isLazy":false,"key":"1","icon":null,"prevNode":0,"nextNode":0,"children":[{"title":"Node 6","isFolder":false,"isLazy":false,"key":"6","icon":null,"prevNode":0,"nextNode":0,"children":[],"tooltip":null,"addClass":null,"expand":false,"MetaData":null}],"tooltip":null,"expand":false,"MetaData":null},{"title":"Node 2","isFolder":false,"isLazy":false,"key":"2","icon":null,"prevNode":0,"nextNode":0,"children":[],"tooltip":null,"expand":false,"MetaData":null},{"title":"Node 3","isFolder":false,"isLazy":false,"key":"3","icon":null,"prevNode":0,"nextNode":0,"children":[],"tooltip":null,"expand":false,"MetaData":null}]

Answer 1

你可以尝试延迟加载，这是一个例子 http://www.gehbeez.com/dynatree-lazy-load-example-with-asp-net/

带有1000复选框的jQuery Dynatree非常慢

1 个答案: