treeview节点点选问题

Question

请教各位高手，如果我的treeview有几千个节点，用JS的话，有什么好的办法可以快速定位选的有哪些节点？

Answer 1

    protected void DisplayRoleRightInfo(int roleId)
    {
        IList<RoleRight> currentRoleParentNodes = RoleRightManager.GetParentNodesByRoleId(roleId);        ArrayList arrRoleParentNodes = new ArrayList();
        foreach (RoleRight roleRight in currentRoleParentNodes)
        {
            arrRoleParentNodes.Add(roleRight.SysFun.NodeId.ToString());
        }
        //得到所有父级节点信息
        IList<SysFun> sysFuns = SysFunManager.GetAllParentNodeInfo();
        //根据父节点得到对应子节点,把父子节点生成用户控件,然后循环插入到PlaceHolder容器中
        foreach (SysFun sysFun in sysFuns)
        {
            //得到父节点Id
            string nodeId = sysFun.NodeId.ToString();
            //得到父节点名称
            string displayName = sysFun.DisplayName;
            //实例化用户控件
            RoleUserControl roleCotrol = (RoleUserControl)LoadControl(@"RoleUserControl.ascx");
            //实例化隐藏域,用以存储父节点Id
            HtmlInputHidden hidParentMenu = (HtmlInputHidden)roleCotrol.FindControl("hidParentMenu");
            hidParentMenu.Value = nodeId;
            //实例化隐藏域,用以存储角色Id
            HtmlInputHidden hidRoleId = (HtmlInputHidden)roleCotrol.FindControl("hidRoleId");
            hidRoleId.Value = roleId.ToString();
            
            //实例化用户控件中的CheckBox
            CheckBox chkParentMenu = (CheckBox)roleCotrol.FindControl("chkParentMenu");            //显示父菜单名称
            chkParentMenu.Text = displayName;            if (arrRoleParentNodes.Contains(nodeId))
            {
                chkParentMenu.Checked = true;
            }            //把父子节点生成的用户控件追加到PlaceHolder容器中
            phRoleDistribute.Controls.Add(roleCotrol);
        }
    }
    protected void btnSave_ServerClick(object sender, EventArgs e)
    {
         int roleId = int.Parse(Request["roleid"].ToString());//获得指定的角色id
         IList<RoleRight> currentRoleRights = RoleRightManager.GetAllNodesByRoleId(roleId);
         ArrayList arrRoleNodes = new ArrayList();
         foreach (RoleRight roleRight in currentRoleRights)
         {
             arrRoleNodes.Add(roleRight.SysFun.NodeId.ToString());
         }         foreach (Control ct in phRoleDistribute.Controls)
         {
             CheckBox chk = (CheckBox)ct.FindControl("chkParentMenu");
             HtmlInputHidden hih = (HtmlInputHidden)ct.FindControl("hidParentMenu");             if (chk.Checked)
             {
                 if (!arrRoleNodes.Contains(hih.Value))
                 {
                     RoleRightManager.InsertRoleRight(roleId.ToString(), hih.Value);
                 }
             }
             else
             {
                 if (arrRoleNodes.Contains(hih.Value))
                 {
                     RoleRightManager.DeleteRoleRight(roleId.ToString(), hih.Value);
                 }
             }             CheckBoxList chklst = (CheckBoxList)ct.FindControl("chklstChildMenu");
             foreach (ListItem li in chklst.Items)
             {
                 if (li.Selected)
                 {
                     if (!arrRoleNodes.Contains(li.Value))
                     {
                         RoleRightManager.InsertRoleRight(roleId.ToString(), li.Value);
                     }
                 }
                 else
                 {
                     if (arrRoleNodes.Contains(li.Value))
                     {
                         RoleRightManager.DeleteRoleRight(roleId.ToString(), li.Value);
                     }
                 }
             }
         }
         Response.Write("<script>alert('权限已生效！！');self.document.location.href='RoleManage.aspx'</script>");
    }
我这有个例子看看有帮助吗？

Answer 2

在选择事件里面，比如click之类的，然后获取事件对象如event.target之类的，看是不是treeview节点，是的话，再判断选中状态

Answer 3

<script language="javascript" type="text/javascript">
function CheckAll(paramId) 
{
var items = document.getElementsByTagName("input"); 
    for(i=0; i<items.length;i++)
    {
        var e = items[i];
var eId = e.id;//获得当前控件元素的Id
var m = eId.indexOf('_chk');
var n = paramId.indexOf('_chk');
//判断控件类型是否是checkbox,父子节点Id是否匹配,以控制只选中该父节点对应的子节点
if(eId.substring(0,m)==paramId.substring(0,n) &&e.type=='checkbox')
{
e.checked = document.getElementById(paramId).checked;
}
     }
}function CheckOnly(paramId)
{
    var items = document.getElementsByTagName("input"); 
for(i=0; i<items.length;i++)
{
        var e = items[i];
var eId = e.id;
var m = eId.indexOf('_chk');
var n = paramId.indexOf('_chk');
//判断控件类型是否是checkbox,父子节点Id是否匹配,以控制只选中该子节点对应的父节点
if(eId.substring(0,m) == paramId.substring(0,n) && e.type=='checkbox')
{
            if(eId.indexOf('chkParentMenu')!=-1){document.getElementById(eId).checked =true;}
}
}
}
</script>