TreeView控件操作开发篇之（三）

1，树控件的上下左右移动。将此组件放到TreeView的keyup事件中，即可看到效果

#region "控制树节点移动,向左右上下"

        /// <summary>
        /// 控件树节点移动
        /// </summary>
        /// <param name="Tv">TreeView控件</param>
        /// <param name="e">TreeView的按键事件</param>
        public void MoveSelectedNode(TreeView Tv,KeyEventArgs e)
        {
            if (Tv.SelectedNode==null)
            {
                return;
            }
            if (e.KeyCode==Keys.Up && e.Control==true)
            {
                TreeNode selNode = Tv.SelectedNode; //当前选中的节点
                TreeNode tempNode =(TreeNode)Tv.SelectedNode.Clone();

                if (selNode.PrevNode == null)
                {
                    return;
                }
                else
                {
                    if (selNode.Parent == null) //表示一级节点
                    {
                        Tv.Nodes.Insert(selNode.Index - 1, tempNode);
                        selNode.Remove();
                        Tv.SelectedNode = tempNode;
                    }
                    else
                    {
                        selNode.Parent.Nodes.Insert(selNode.Index - 1, tempNode);
                        selNode.Remove();
                        Tv.SelectedNode = tempNode;
                    }
                }
            }
            else if (e.KeyCode==Keys.Down && e.Control==true)
            {
                 TreeNode selNode = Tv.SelectedNode; //当前选中的节点
                 TreeNode tempNode =(TreeNode)Tv.SelectedNode.Clone();

                 if (selNode.NextNode==null)
                 {
                     return;
                 }
                 if (selNode.Parent == null) //表示一级节点
                 {
                     Tv.Nodes.Insert(selNode.Index + 2, tempNode);
                 }
                 else
                 {
                     selNode.Parent.Nodes.Insert(selNode.Index + 2, tempNode);
                 }
                 selNode.Remove();
                 Tv.SelectedNode = tempNode;
            }
            else if (e.KeyCode == Keys.Left && e.Control==true)
            {

                TreeNode selNode = Tv.SelectedNode; //当前选中的节点
                TreeNode tempNode = (TreeNode)Tv.SelectedNode.Clone();

                if (selNode.Parent==null)//表示一级节点
                {
                    return;
                }
                if (selNode.Parent.Parent == null) //表示是三级节点
                {
                    Tv.Nodes.Add(tempNode);

                }
                else
                {
                    selNode.Parent.Parent.Nodes.Add(tempNode);

                }
                selNode.Remove();
                Tv.SelectedNode = tempNode;
            }
            else if (e.KeyCode==Keys.Right && e.Control==true)
            {
                
                TreeNode selNode = Tv.SelectedNode; //当前选中的节点
                TreeNode tempNode = (TreeNode)Tv.SelectedNode.Clone();
                if (selNode.NextNode==null)
                {
                    return;
                }
                selNode.NextNode.Nodes.Insert(0, tempNode);
                selNode.Remove();
                Tv.SelectedNode = tempNode;
            }
        }
        #endregion

2.查找遍历树节点,三种方法

      

  #region "查找遍历树节点"

        /// <summary>
        /// 查找遍历树节点,根据节点名称
        /// </summary>
        /// <param name="Tv">要查找的树</param>
        /// <param name="NodeName">查找的树的节点名称</param>
        /// <returns>TreeNode[]</returns>
        public TreeNode[] FindTreeNodeFromNodeName(TreeView Tv, string NodeName)
        {
            if (Tv.Nodes!=null)
            {
                 return Tv.Nodes.Find(NodeName, true);
            }
            return null;
        }

        /// <summary>
        /// 查找遍历树节点,根据树节点路径
        /// </summary>
        /// <param name="Tv">要查找的树</param>
        /// <param name="NodeFullPath">查找树的节点路径</param>
        /// <returns></returns>
        public TreeNode FindTreeNodeFromNodePath(TreeView Tv, string NodeFullPath)
        {
            string tempPath = string.Empty;
            if (NodeFullPath.LastIndexOf("\\") > 0) //节点0//节点3//节点8
            {
                tempPath = NodeFullPath.Substring(NodeFullPath.LastIndexOf("\\") + 1);
            }
            else
            {
                tempPath = NodeFullPath;
            }
            TreeNode[] Node = FindTreeNodeFromNodeName(Tv, tempPath);
            foreach (TreeNode aNode in Node)
            {
                if (aNode.FullPath == NodeFullPath)
                {
                    return aNode;
                }
            }
            return null;

        }

        /// <summary>
        /// 查找遍历树节点,根据树节点tag
        /// </summary>
        /// <param name="Tv">要查找的树</param>
        /// <param name="tag">要查找的tag值</param>
        /// <returns></returns>
        public TreeNode[] FindTreeNodeFromNodeTag(TreeView Tv, string tag)
        {
            try
            {
                TreeNode[] tNode = null;
                if (Tv == null && Tv.Nodes.Count == 0)
                {
                    return null;
                }
                System.Collections.ArrayList aList = new System.Collections.ArrayList();

                foreach (TreeNode node in Tv.Nodes)
                {
                    ForTreeNode(node, tag, ref aList);
                }
                tNode = new TreeNode[aList.Count];

                for (int i = 0; i < aList.Count; i++)
                {
                    tNode[i] = (TreeNode)aList[i];
                }

                return tNode;
            }
            catch
            {
                return null;
            }
        }

        /// <summary>
        /// 递归树的节点
        /// </summary>
        /// <param name="node">要遍历的节点</param>
        /// <param name="tag">查找的Tag值</param>
        /// <param name="aList"></param>
        private void ForTreeNode(TreeNode node, string tag, ref System.Collections.ArrayList aList)
        {
            if (node.Tag!=null && node.Tag.ToString()==tag)
            {
                aList.Add(node);//将节点添加到数组中
            }
            foreach (TreeNode iNode in node.Nodes)
            {
                ForTreeNode(iNode,tag,ref aList);
            }
        }
        #endregion