treeview + and - issue. pls help meout

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C#

ASP.NET

SQL-Server

hi,

I am showing record in treeview format using asp .net treeview control.

Note: + and - is treenode expand event and tree1,tree1.1,tree2,tree2.1,tree2.2 are treenode change event. this we know generally.

for example:

+ tree1
     - tree1.1
     -tree1.2
+ tree2
      -tree2.1
      -tree2.2

so, i took my data from data base and formed in treeview format. till now everything works fine.

the problem is that: when i click + on tree1 family , it expands it's child---> here also no issue.

and secondly when i click + on tree2 family , it expands it's child----> here the first family (ie tree1) should collapse automatically. right? but it is not doing. that is the issue.

Note: here when you click + and - , no loading or postpack. just expand.

so, i used one coding follows which solves that problem. but it is loading or does post pack. so, it faces slow just expand and collapse.

bool Block = false;
protected void tree_expand(object sender, TreeNodeEventArgs e)
{

if (Block == true) // stop recursive re-entrancy
return;
Block = true;

treeview1.CollapseAll();                               // treeview1 is nothinbut. it is id of treeview in aspx page. <asp:treeview id="treeview1".......

TreeNode Node = e.Node;
while (Node != null)
{
Node.Expand();
 Node = Node.Parent;

Node = Node.Parent;
}


Block = false;
}

please help me out..lead me in right way. thank you. somebody says use jquery plugin with json. but i am not able find exact coding or step by step to do that. so, i have done normal asp.net treeview. if you solve atleast the problem , it will be more helpful.