TreeView上节点的拖动和节点的遍历

节点的拖动  

  private void treeView1_ItemDrag(object sender, ItemDragEventArgs e) { // Move the dragged node when the left mouse button is used. if (e.Button == MouseButtons.Left) { DoDragDrop(e.Item, DragDropEffects.Move); } // Copy the dragged node when the right mouse button is used. else if (e.Button == MouseButtons.Right) { DoDragDrop(e.Item, DragDropEffects.Copy); } } // Set the target drop effect to the effect // specified in the ItemDrag event handler. private void treeView1_DragEnter(object sender, DragEventArgs e) { e.Effect = e.AllowedEffect; } // Select the node under the mouse pointer to indicate the // expected drop location. private void treeView1_DragOver(object sender, DragEventArgs e) { // Retrieve the client coordinates of the mouse position. Point targetPoint = treeView1.PointToClient(new Point(e.X, e.Y)); // Select the node at the mouse position. treeView1.SelectedNode = treeView1.GetNodeAt(targetPoint); } private void treeView1_DragDrop(object sender, DragEventArgs e) { // Retrieve the client coordinates of the drop location. Point targetPoint = treeView1.PointToClient(new Point(e.X, e.Y)); // Retrieve the node at the drop location. TreeNode targetNode = treeView1.GetNodeAt(targetPoint); // Retrieve the node that was dragged. TreeNode draggedNode = (TreeNode)e.Data.GetData(typeof(TreeNode)); // Confirm that the node at the drop location is not // the dragged node or a descendant of the dragged node. if (!draggedNode.Equals(targetNode) && !ContainsNode(draggedNode, targetNode)) { // If it is a move operation, remove the node from its current // location and add it to the node at the drop location. if (e.Effect == DragDropEffects.Move) { draggedNode.Remove(); targetNode.Nodes.Add(draggedNode); } // If it is a copy operation, clone the dragged node // and add it to the node at the drop location. else if (e.Effect == DragDropEffects.Copy) { targetNode.Nodes.Add((TreeNode)draggedNode.Clone()); } // Expand the node at the location // to show the dropped node. targetNode.Expand(); } } // Determine whether one node is a parent // or ancestor of a second node. private bool ContainsNode(TreeNode node1, TreeNode node2) { // Check the parent node of the second node. if (node2.Parent == null) return false; if (node2.Parent.Equals(node1)) return true; // If the parent node is not null or equal to the first node, // call the ContainsNode method recursively using the parent of // the second node. return ContainsNode(node1, node2.Parent); } 节点的遍历 //调用 TreeNodeCollection tc = treeView1.Nodes; GetNode(tc); public void GetNode(TreeNodeCollection tc) { foreach (TreeNode TNode in tc) { //操作TNode如获得TNode的相关属性 //... GetNode(TNode.Nodes); } }