[Solved] Trying to Collapse the Level==0 Nodes

[Bob]

Hello, i think i've tried just about every option i can find to Collapse the ChildNodes of the Level==0 parent i suspect that  is has something to do with the fact that i'm not actually using the " e " in e.Nodes.... to try and do the actual process but i'm trying to use the actual RadTreeView ID collection itself, but the reason i'm doing that is because i want to Collapse  all of the Level 0 AAAA node when i then select the Level 0 BBBB node for instance, so if i tried to use the " e " value i would be pointing to the BBBB node which i what i want to expand, but before i expand it, i want to Collapse the AAAA node  just for example. thanks for any ideas or suggestins!     protected void trvDB2_NodeExpand(object sender, RadTreeNodeEventArgs e)

{

foreach (RadTreeNode rtn in trvDB2.Nodes)

{

if (rtn.Level == 0 && !e.Node.Text.Equals(rtn.Text))

{

int    rntnc = rtn.Nodes.Count;

//Nodes   ns = rtn.Nodes.Remove();

//for (int index = rtn.Nodes.Count - 1; index >= 0; index--)

for   (int index = rtn.Nodes.Count - 1; index >= 0; index--)

{

//string rtnrtntxt0 = rtn.Nodes[index].Text;

//if (rtn.Nodes[index].Level==1)

//{

//    //string rtnrtntxt = rtn.Text;

//    //string rntnit = rtn.Nodes[index].Text;

//    rtn.Nodes.Clear();

//    //rtn.Nodes[index]

//    //rtn.Nodes[index];

//    //rtn.Nodes

//}

}

//string x = rtn.Text;

//IEnumerator ie =  rtn.Nodes.GetEnumerator();

//while (ie.MoveNext())

//{

//    ((RadTreeNode)(ie.Current)).Nodes.Clear();

//}

//foreach (RadTreeNode rtn2 in rtn.Nodes)

//{

//     //string r = rtn

//     //rtn2.Nodes.Clear();

//     //rtn2.c

//     //rtn2.Nodes.Clear();

//     //rtn.Nodes.Remove(rtn2);

//}

//rtn.Nodes.Remove();

//rtn.CollapseChildNodes();

//rtn.CollapseParentNodes();

}

}

for (int index = trvDB2.CheckedNodes.Count - 1; index >= 0; index--)

{

//trvDB2.CheckedNodes[index].Checked = false;

}

for (int index = trvDB2.Nodes.Count - 1; index >= 0; index--)

{

string trvnodetxt = trvDB2.Nodes[index].Text;

if (trvDB2.Nodes[index].Level == 0 && !e.Node.Text.Equals(trvnodetxt))

{

trvDB2.Nodes[index].CollapseChildNodes();

trvDB2.Nodes[index].Nodes.Clear();

trvDB2.Nodes[index].Remove();

}

}

//e.Node.CollapseChildNodes();

//e.Node.CollapseParentNodes();

//PopulateNodeOnDemand(e, TreeNodeExpandMode.ServerSideCallBack);

}

[Yana]

Hello,

If you're using ExpandMode="ServerSideCallBack" for the nodes, you cannot modify the other nodes in NodeExpand event handler  - the reason for this is that you make a callback to the server and only new nodes can be added to the expanded node. You should either use ExpandMode="ServerSide" or collapse the other nodes on the client.

All the best,
Yana
the Telerik team

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[Bob]

great that was the solution Yana, thanks alot!