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Adding CLICK event when creating TREENODES

I have a C# Windows form that progamatically creates treenodes when user selects a button.  After the treenode is created it needs to have a CLICK event added.  How do I assign an event when creating a treenode?

treeGX1.Nodes[0].Nodes.Add(newNode);

After I create the treenode I need to assign an event called "TReeNodeCLick".
0
Hojoformo
Asked:
Hojoformo
  • 2
1 Solution
 
p_davisCommented:
you are either going to have to derive a class of your own and create the event

or you can just go by HitTest on the Treeview, when clicked, to get the node at x/y coordinates.
0
 
Todd GerbertIT ConsultantCommented:
The standard TreeNode doesn't have a Click event, but if you're using some other control:
TreeNode newNode = new TreeNode("Node Text");
newNode.TreeNodeClick += node_click; // Assign a function to the event
treeGX1.Nodes[0].Nodes.Add(newNode);

private void node_click(object sender, EventArgs e)
{
  TreeNode clickedNode = (TreeNode)sender;
  MessageBox.Show("The following node was clicked: " + clickedNode.Text);
}

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If you're using the standard TreeView control, you'd handle the Click event of the TreeView itself (not of the node), and then use the SelectedNode property of the TreeView to know which node is selected.
public partial class Form1 : Form
{
	public Form1()
	{
		InitializeComponent();
	}

	private void Form1_Load(object sender, EventArgs e)
	{
		treeView1.Click += treeView1_Click; // Assign Click event handler of TreeView

		// Add a node
		treeView1.Nodes.Add("Hello WOrld");
	}

	private void treeView1_Click(object sender, EventArgs e)
	{
		MessageBox.Show("The following node was clicked: " + treeView1.SelectedNode.Text);
	}
}

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0
 
Todd GerbertIT ConsultantCommented:
Or, probably better to handle the AfterSelect event of the TreeView.

public partial class Form1 : Form
{
	public Form1()
	{
		InitializeComponent();
	}

	private void Form1_Load(object sender, EventArgs e)
	{
		treeView1.AfterSelect += new TreeViewEventHandler(treeView1_AfterSelect);

		// Add a node
		treeView1.Nodes.Add("One");
		treeView1.Nodes.Add("Two");
		treeView1.Nodes.Add("Three");
	}

	void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
	{
		MessageBox.Show("Selected node: " + e.Node.Text);
	}
}

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