通过键盘方向键控制TreeView节点的移动

      #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