樹結構是分別從4張表里取出來的，全放在viewstate中，數據少沒問題，要是樹的第4層有2000多個節(jié)點，刷一次，頁面就卡死，1分多鐘后正常。創(chuàng)建樹的方法執(zhí)行是3秒中，更改圖片是1秒鐘，首次訪問正常，刷新為什么顯示頁面會卡死啊，1分多鐘后正常。2臺機子都是這樣，刷新我只執(zhí)行了換圖片的方法，快救人啊
在pageload中的
if(!ispostback)
{
? ........
? createTreeView()
//createTreeView()中再調用二級節(jié)點的方法，依此類推，共4層
}
else
{
//用timer控件，每1分鐘刷一次，更新樹的圖片
?? UpdateTreeViewImg();
}
?
? private void UpdateTreeViewImg()??? {
?????? ?List<Model.c_unend_alarm> sAlarmList = new List<Model.c_unend_alarm>();??????? sAlarmList = TreeBll.GetUnendAlarm();??????? foreach (TreeNode tn_area in this.TreeView1.Nodes)??????? {??????????? string aid = (tn_area.Value).ToString();??????????? foreach (TreeNode tn_group in tn_area.ChildNodes)??????????? {??????????????? int a = 0;??????????????? foreach (TreeNode tn_bureau in tn_group.ChildNodes)??????????????? {??????????????????? int b = 0;??????????????????? foreach (TreeNode tn_device in tn_bureau.ChildNodes)??????????????????? {??????????????????????? int c = 0;??????????????????????? string b_dID = (tn_device.Value).ToString();??????????????????????? string[] arry = b_dID.Split('*');??????????????????????? for (int i = 0; i < sAlarmList.Count; i++)??????????????????????? {
??????????????????????????? if (Convert.ToInt32(arry[0]) == sAlarmList[i].Device_id && Convert.ToInt32(arry[1]) == sAlarmList[i].Bureau_id && Convert.ToInt32(aid) == sAlarmList[i].Area_id)??????????????????????????? {??????????????????????????????? tn_device.ImageUrl = "Web_Img/Alarm/red.gif";??????????????????????????????? tn_bureau.ImageUrl = "Web_Img/Alarm/red.gif";??????????????????????????????? tn_group.ImageUrl = "Web_Img/Alarm/red.gif";??????????????????????????????? a++;??????????????????????????????? b++;??????????????????????????????? c++;??????????????????????????????? break;??????????????????????????? }??????????????????????? }??????????????????????? if (c == 0)??????????????????????? {??????????????????????????? tn_device.ImageUrl = "Web_Img/Alarm/green.gif";??????????????????????? }??????????????????? }??????????????????? if (b == 0)??????????????????? {??????????????????????? tn_bureau.ImageUrl = "Web_Img/Alarm/green.gif";??????????????????? }??????????????? }??????????????? if (a == 0)??????????????? {??????????????????? tn_group.ImageUrl = "Web_Img/Alarm/green.gif";
??????????????? }??????????? }??????? }
}
?
?public void CreateTree()??? {??????? List<Model.c_area_info> Arealist = (List<Model.c_area_info>)ViewState? ["Arealist"];
?????????????????????? for (int i = 0; i < Arealist.Count; i++)??????? {??????????? Model.c_area_info AreaModel = new Model.c_area_info();??????????? AreaModel = Arealist[i];??????????? TreeNode Fnode = new TreeNode();??????????? Fnode.Text = (AreaModel.Area_name).ToString();??????????? Fnode.Value = (AreaModel.Area_id).ToString();??????????? Fnode.Target = "right";??????????? ??????????? this.TreeView1.Nodes.Add(Fnode);??????????? CreateChildNode(Convert.ToInt32(Fnode.Value), Fnode);??????? }??? }
net樹結構刷新問題
慕運維8079593
2018-12-06 23:49:01
