AJAX :: Unable To Control Treeview Node Expand And Collapse

Aug 20, 2010

[Code]....

I am used treeview control within updatepanel,updation was no problem but i am unable to control treeview node expand and collapse.

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Mar 10, 2011

On a treeview, you can collapse/expand the nodes by clicking the +/- icon.

I would like to know how I can also click the node text to achieve the same results.

I want to be able to click the node text to expand/collapse the node.

How can I do this in ASP.NET/C# ?

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Jul 16, 2010

I've built a TreeView in ASP.NET 3.5 and it works great, except the expand and collapse images (which are 20px by 20px) do not align properly with the text in the nodes. Below is a screen shot of the applicable tree, with all items selected to allow you to see where the items are lined up. I need the text to be vertically centered (by one means or another) so it lines up with the center of its expand/collapse image.

I've tried numerous tricks to make this happen, including CSS, but can't seem to find the right technique.

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Feb 11, 2010

I am trying to use a treeview control in my application. From the begining I had one parentnode and several childnodes for each parentnode. I wanted to be able to close an opened node when I click on a new one and I maneged that with OnTreeNodeExpanded method.

My problem is that I now need to expand my treeview so it will look something like this:

[code]....

What I want now is:

1. to be able to close an opened parentNode if i click on some other parentNode,

2. if i click on childNode i want to expand it so I can see grandchild,

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How To Do Treeview Expand/collapse In JavaScript

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in my asp.net treeview if i click one parent node then it should be extended if i click again on that node it should be collapsed in treeview...

is any javascript availabe for this? or any code in selected node changed?

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I'm new to the Ajax Control Tool Kits and I was trying to use the accordion control which is cool according to

its sample.

I followed this video tutorials, however after I created the simple demo, the accordion control doesn't collapse or expand. It just didn't respond to my clicks.

Following is my code and I've trimmed is as simple as possible.

[Code]....

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I've got a Treeview inside an Updatepanel, currently I'm developing directly on a dev server with a remote connection to it. I've set the CollapseImageUrl and ExpandImageUrl properties and when I view it on the dev servers' browser it renders fine.

It produces:

[code]....

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When Expand And Collapse Nodes In The Treeview, The SurroundingWrapper Div Resizes?

Oct 18, 2010

The following is a version of some code I'm having trouble running in IE version 6. It seems to work fine in IE 7, IE 8, FireFox, and Google Chrome. But in IE 6, when I expand and collapse nodes in the treeview, the SurroundingWrapper div resizes, but the message at the bottom stays glued in place (I'd prefer it stayed glued to the bottom of the div SurroundingWrapper). Can someone please tell my why this code falls apart in IE 6?

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0

[code]...

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Web Forms :: Treeview Expand/collapse All Nodes Client Side?

Mar 26, 2010

This is so frustrating...that such a simple feature should not be included in the design of this control. I am using the cssfriendly adapters and the rendered code is shown below.

I thought I might be able to use the adapter's treeview JS function ExpandCollapse__AspNetTreeView(this) since this is what is called when I click on the node that causes it to expand/contract. But that did not work.

I have seen other code posted but it seemed to imply the treeview was a table not a ul.

Does anyone know how to simply expand or collapse all nodes from a link button without doing the postback. Of course the postback works but what a waste to have to postback to do such a simple action.

Why doesn' t MS consider the users and developers when creating these controls and tools? Stupid!

[code]....

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Nov 12, 2010

i have a databound treeview in asp.net. how can i expand the root node and have the rest of the tree nodes all colapsed?

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Jun 22, 2010

What I am acheiving is a simple treeview which will have a tree structure

dir1
-- xx
dir2
Simple stuff !. Here is the code

TreeNode tree1 = new TreeNode("dir1", "", "", "dir1", "");
tree.Nodes.Add(tree1);
TreeNode node = new TreeNode("xx", "xx");
tree1.ChildNodes.Add(node);
TreeNode tree2 = new TreeNode("dir2", "", "", "dir2", "");
tree.Nodes.Add(tree2);

Now I want to do is collapse all the tree and find a particular node e.g dir1xx
I have put the code

tree.CollapseAll();
tree.FindNode("dir1").Select(); <-- falls over
tree.FindNode("dir1").Expand();
tree.FindNode("dir1/xx").Select();
tree.FindNode("dir1/xx").Expand();

but it falls over on the 2nd line with object not set

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I have an example here of what I am trying to accomplish:

[URL]

I am using asp.net with VB.

I have been scouring the internet looking for a solution, but so far haven't found anything that works.

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[Code]....

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[Code]....

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[code]...

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