Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

TreeView Control in C#

Posted on 2006-06-30
1
263 Views
Last Modified: 2010-04-16

Hi all,

I would like to know how to access all the selected nodes in a tree view control in C#. I have tree with some nodes. I select some of them by using control key, but I am having trouble in my c# program to get access to all the selected tree nodes. It seems like I can only select one  node at a time.

How do I get around this problem ??

Thank you for your help in advance.


Ramesh
0
Comment
Question by:Ramesh4u
1 Comment
 
LVL 5

Accepted Solution

by:
aaronfeng earned 50 total points
ID: 17022694
Yes, you are correct for Winform.  You can not retrieve all selected nodes at once, only one at a time.  You will have to traverse all the nodes in order to find all the selected nodes.  In the past, I wrapped the TreeView control, so I can add this functionality in one place; however, you can just create a function to do it for you.

You would do something like this:

private void FindAllCheckedNodes(List<TreeNode> outputNodes, TreeNodeCollection parentNodes) {
  foreach (TreeNode node in parentNodes) {
    if (node.SelectedNode) {
      outputNodes.Add(node);
    }
    FindAllCheckedNodes(outputNodes, node.Nodes);
  }
}

outputNodes will contain all the selected nodes when the function is done running.  You will pass in the root node as the second argument.

Cheers,

Aaron
http://geekswithblogs.net/afeng/
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

766 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question