protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
 bindTree();
    }
}
private void bindTree()
{
    ALIYUN_PIC.BLL.Folder_oper_BLL bll = new Folder_oper_BLL();
    
    DataTable dt = bll.PIC_Bind();//得到需要的datatable
    this.FillNode(dt, null);
}
private void FillNode(DataTable dt, TreeNode node)
{
    DataView dv = new DataView(dt);
    if (node == null)    //根結(jié)點(diǎn)
    {
 dv.RowFilter = "PARENT_NODE='0'";  //篩選到根結(jié)點(diǎn)的所有子節(jié)點(diǎn)
    }
    else  //不是根結(jié)點(diǎn)
    {
 dv.RowFilter = "PARENT_NODE='" + node.Value + "'";   //篩選對(duì)應(yīng)節(jié)點(diǎn)的所有子節(jié)點(diǎn)
    }
    foreach (DataRowView drv in dv)   //遍歷填充節(jié)點(diǎn)的所有子節(jié)點(diǎn)，如果傳入的節(jié)點(diǎn)node為葉子節(jié)點(diǎn)，遍歷要退出，不再進(jìn)行遞歸
    {
 TreeNode no = new TreeNode(drv["NODE_NAME"].ToString(), drv["id"].ToString());
 FillNode(dt, no);  //填充no節(jié)點(diǎn)的子節(jié)點(diǎn)
 if (node == null)
 {                 
     this.PIC_TREE.Nodes.Add(no);
 }
 else
 {
     node.ChildNodes.Add(no);
 }
    }
}