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对“打造基于jQuery的高性能TreeView”的扩展

 2009-10-28 00:00:00 来源:WEB开发网   
核心提示: /**<summary>///添加一个子节点///</summary>///<paramname="ti"></param>///<returns></returns>publicList<Tree

    /**//// <summary>
    /// 添加一个子节点
    /// </summary>
    /// <param name="ti"></param>
    /// <returns></returns> 
    public List<TreeItem> Add(TreeItem ti)
    {
        if (ChildNodes == null) ChildNodes = new List<TreeItem>();
        ChildNodes.Add(ti);
        return ChildNodes;
    }

第三步:开始使用TreeView显示用服务器端生成的数据

好了,现在我们试试添加一个“一般处理程序”来生成相应的json子句。

添加 “GetTreeData.ashx” 代码如下: 

ProcessRequest 
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";
        TreeItem tdata = new TreeItem() { id = 0, checkstate = 0, complete = true, isexpand = true, showcheck = true, text = "所有项目", value = "" }; 
        for (int i = 1; i <= 20; i++)
        {
            TreeItem t = new TreeItem() { id = i, text = i.ToString(), value = i.ToString(), showcheck = true, isexpand = false, complete = true };
            if (i % 3 == 2)
            {
                //模拟多级树节点
                  t.ChildNodes = new List<TreeItem>();
                t.ChildNodes.Add(new TreeItem() { id = i * 999 + 1, text = (i * 999 + 1).ToString(), value = (i * 999 + 1).ToString(), showcheck = true, complete = true });
                t.ChildNodes.Add(new TreeItem() { id = i * 999 + 2, text = (i * 999 + 2).ToString(), value = (i * 999 + 2).ToString(), showcheck = true, complete = true });
                t.ChildNodes.Add(new TreeItem() { id = i * 999 + 3, text = (i * 999 + 3).ToString(), value = (i * 999 + 3).ToString(), showcheck = true, complete = true });
            }
            if (t.hasChildren) t.ChildNodes[t.ChildNodes.Count - 1].complete = true;
            tdata.Add(t);
        }
        tdata.ChildNodes[tdata.ChildNodes.Count - 1].complete = true;
        context.Response.Write(tdata.ToJsonString());       
    }

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Tags:打造 基于 jQuery

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