I have a problem with the TreeView control in WinForm. The thing is, I need to automate the process of inserting nodes by using a while loop and using the node previously inserted in the control as the parent node search criterion.
Here my problem arises, when I look for the node in the control I use this code:
foreach (TreeNode singleNode in Repository_TreeView.Nodes)
{
if (singleNode.Text.Contains(specificPTN) == true)
{
Repository_TreeView.SelectedNode = singleNode;
}
In this way, however, I only get the nodes in the highest level of the hierarchy. So, for example:
/--------------------------------------------------\
| + rootnode1 |
| | +---> childnode1 |
| | +---> grandchildnode1 |
| | | |
| | +---> grandchildnode1 |
| | |
| + rootnode2 |
| +---> childnode2 |
| +---> grandchildnode2 |
| | |
| +---> grandchildnode2 |
| |
| |
\--------------------------------------------------/
In this case my code would only get the node 'rootnode1' and 'rootnode2', when I need to get all the other subnodes instead.
I also tried using this lambda expression to look up the node by name:
TreeNode[] parentNodes = Repository_TreeView.Nodes
.Cast<TreeNode>()
.Where(r => r.Text == specificPTN)
.ToArray();
The result, however, is always the same, 'rootnode1' and 'rootnode2' are always found.
I hope someone can help me find a way to get all the nodes and subnodes out of control. Thanks and sorry for the long explanation.
By iterating over TreeView->Nodes , you are getting only top level Nodes. TreeView->Nodes(of type TreeNodeCollection) has a Find(string, boolean) method that you can use to search for a node with specific text. You can call this method like
Repository_TreeView.Nodes.Find(specificPTN, true)
to get all the matching nodes.