TreeView Control.
The Windows TreeView control is used to display a hierarchical collection or list
of items. An example is commonly seen with Windows explorer.
Namespace: System.Windows.Forms
Assembly: Systems.Windows.Forms.dll
using System.Windows.Forms;
Calling: System.Windows.Forms.TreeView
Creating a new System.Windows.Forms.TreeView control.
TreeView treeView1 = new TreeView();
Adding the TreeView control to a Windows form.
this.Controls.Add(treeView1);
Placing the TreeView on the form at a specific location.
treeView1.Location = new Point(50, 50);
To add nodes to the TreeView control.
for (int i = 0; i < 20; i++) { TreeNode treeNode1 = new TreeNode(); treeNode1.Text
= "TreeNode " + i.ToString(); this.treeView1.Nodes.Add(treeNode1); }
To add an event to determine which treenode has been selected.
this.treeView1.AfterSelect+=new TreeViewEventHandler(treeView1_AfterSelect);
To respond to the treenode which has been selected.
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e) { MessageBox.Show(e.Node.Text);
}
To remove a selected TreeNode from the TreeView.
First we make sure that a TreeNode is selected, then we remove that TreNode from
the TreeView.
if (this.treeView1.SelectedNode != null)
{
TreeNode treeNode = (TreeNode)this.treeView1.SelectedNode;
this.treeView1.Nodes.Remove(treeNode);
}
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