通过键盘方向键控制TreeView节点的移动

本文转载：http://dengzebo.blog.163.com/blog/static/18867406201032141932204/

     #region "控制树节点移动,向左右下上"
        /// <summary>
        /// 通过Ctrl+键盘移动选定的树节点
        /// </summary>
        /// <param name="TreeView1">要编辑的TreeView控件</param>
        /// <param name="eKeys">The <see cref="System.Windows.Forms.KeyEventArgs"/>KeyEventArgs为按键事件提供数据</param>
        public void MoveSelectNode(TreeView TreeView1, KeyEventArgs eKeys)
        {
            try
            {
                if (TreeView1.SelectedNode == null)
                {
                    return;
                }

                try
                {
                    if (eKeys.KeyCode == Keys.Up && eKeys.Control == true)
                    {
                        TreeNode TN = new TreeNode();
                        TN = TreeView1.SelectedNode;
                        TreeNode TempNode = (TreeNode)TreeView1.SelectedNode.Clone();
                        if (TreeView1.SelectedNode.PrevNode == null)
                        {
                            return;

                        }
                        if (TN.Parent == null)
                        {
                            TreeView1.Nodes.Insert(TN.Index - 1, TempNode);
                        }
                        else
                        {
                            TN.Parent.Nodes.Insert(TN.Index - 1, TempNode);
                        }

                        TreeView1.SelectedNode.Remove();
                        TreeView1.SelectedNode = TempNode;
                    }

                    else if (eKeys.KeyCode == Keys.Down && eKeys.Control == true)
                    {
                        TreeNode TN = new TreeNode();
                        TN = TreeView1.SelectedNode;
                        TreeNode TempNode = (TreeNode)TreeView1.SelectedNode.Clone();
                        if (TreeView1.SelectedNode.NextNode == null)
                        {
                            return;
                        }
                        if (TN.Parent == null)
                        {
                            TreeView1.Nodes.Insert(TN.Index + 2, TempNode);
                        }
                        else
                        {
                            TN.Parent.Nodes.Insert(TN.Index + 2, TempNode);
                        }
                        TreeView1.SelectedNode.Remove();
                        TreeView1.SelectedNode = TempNode;
                    }
                    else if (eKeys.KeyCode == Keys.Left && eKeys.Control == true)
                    {
                        TreeNode TN = new TreeNode();
                        TN = TreeView1.SelectedNode;
                        TreeNode TempNode = (TreeNode)TreeView1.SelectedNode.Clone();
                        if (TreeView1.SelectedNode.Parent == null)
                        {
                            return;
                        }
                        else
                        {
                            if (TreeView1.SelectedNode.Parent.Parent == null)
                            {
                                TreeView1.Nodes.Add(TempNode);
                            }

                            else
                            {
                                TN.Parent.Parent.Nodes.Add(TempNode);
                            }
                        }
                        TN.Remove();
                        TreeView1.SelectedNode = TempNode;
                    }
                    else if (eKeys.KeyCode == Keys.Right && eKeys.Control == true)
                    {
                        TreeNode TN = new TreeNode();
                        TN = TreeView1.SelectedNode;
                        TreeNode TempNode = (TreeNode)TreeView1.SelectedNode.Clone();
                        if (TreeView1.SelectedNode.NextNode == null)
                        {
                            return;
                        }
                        TN.NextNode.Nodes.Insert(0, TempNode);
                        TN.Remove();
                        TreeView1.SelectedNode = TempNode;
                    }
                }
                catch
                {

                }

            }
            catch
            { }

        }

        #endregion