We Keep Coding

How to get the name of the selected child node in a treeview list in c#?

I am using the command:
selecteddirectory = treeViewDirectory.SelectedNode.Text;
However this always gives the name of the parent node and not the child node selected.
How to go about doing this?

You can call the treeview_AfterSelect event to select the child node.
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
string selectedNodeText = e.Node.Text;
MessageBox.Show(selectedNodeText);
}
Like this:

selecteddirectory = treeViewDirectory.SelectedNode.Name;

Get an Object from a TreeView node in C#

I'm writing an AutoCAD Plug-in that shows all the entities as Nodes in a TreeView. I want to be able to get the object from the Node to be able to work with programmatically. This is my code for when a node is clicked:
private void treeView1_MouseClick(object sender, MouseEventArgs e)
{
TreeNode node = treeView1.SelectedNode;
propertyGrid1.SelectedObject = node;
/*Entity selectedEntity = node.getObject() as Entity; Pseudo-code, need to know how to do this*/
}

TreeNode has a Tag property that's designed to allow you to associate an object with a Node.

Getting the value of the Selected Child Nodes on click Event in WPF TreeView

I have a TreeView in WPF Which contains One Main Node and 5 Child Node.As soon as Main Node is expanded we get child Nodes.Now on Expanding child node we get some Values.This is the representation of my treeView In WPF.In this one i want to get the Value of one of the 5 Child Node that has been expanded.
Here is the code that i am trying ..
void getTreeView()
{
TreeViewItem treeItem = null;
treeItem = new TreeViewItem();
treeItem.Header = "Name";
treeItem.MouseLeftButtonUp += treeItem_MouseLeftButtonUp;
}
void treeItem_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
TreeViewItem item = sender as TreeViewItem;
foreach(TreeViewItem child in item.Items) {
string childNode=child.Header as string;
}
}
But here in childNode i am getting the value of the all 5 child node whereas i need to that of the selected ones.
Please help me

If you want to get only selected node, check for IsSelected property of TreeViewItem like this:
foreach(TreeViewItem child in item.Items)
{
if(child.IsSelected)
{
string childNode= child.Header.ToString();
}
}

I just got the following code to work. The sender ended up being the entire TreeView control, not just the selected TreeViewItem.
private void treeS3Items_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
System.Windows.Controls.TreeView s3Tree = sender as System.Windows.Controls.TreeView;
System.Windows.Controls.TreeViewItem treeS3Item = s3Tree.SelectedItem as System.Windows.Controls.TreeViewItem;
MessageBox.Show($"You clicked on [{treeS3Item.Header}]");
}

Set SelectAction on all tree nodes for ASP.NET TreeView control

I have a TreeView web control on an ASP page. I am programmatically populating all the tree nodes. I want to disable the link on ALL tree nodes. I can do it one at a time, like this (using a string array for simplicity's sake):
for each (string strValue in strValues)
{
TreeNode objNode = new TreeNode(strValue);
objNode.SelectAction = TreeNodeSelectAction.None;
objTreeView.Nodes.Add(objNode);
}
Assume for the sake of argument that I have multiple level of nodes, so there is not a simple way to iterate through all nodes once I am done populating. Is there a property I can set on the TreeView to set SelectAction for all nodes?

TreeView does not support any property to do this. However you can do it by using recursive methods

This should solve your problem:
protected void Page_Load(object sender, EventArgs e)
{
processNode(trvTest.Nodes);
}
private void processNode(TreeNodeCollection nodes)
{
foreach (TreeNode node in nodes)
{
node.SelectAction = TreeNodeSelectAction.None;
if (node.ChildNodes.Count > 0)
processNode(node.ChildNodes);
}
}

C# treeview node

I have a treeview1:
treenode--
treenode1--
treenode2
treenode3
You can select only node2 and node3 if you want to display them parameters. How can i block selecting node and node1? I try like that,but than you can select all nodes:
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
...
}

you will have to use SelectAction Property on the tree node. you will need to set it on the node when you are creating them.
set selectaction=none on node and node1

If it's a win forms TreeView handle the BeforeSelect event and set the Cancel property of your TreeViewCancelEventArgs parameter to false. For web controls see Vinay's answer.