asp 使用TreeView控件

这段代码为了使用 TreeNodeCheckChanged 事件，会有回刷新的效果；

不喜欢的可查看改进版，利用js控制选择操作，无界面刷新， “http://www.cnblogs.com/GoCircle/p/6231985.html”；

 

 

前台代码

    <style>.tn td {height: 18px;display: flex;}.tn tr {display: flex;}.tn a {line-height: 18px;}</style><script type="text/javascript">function postBackByObject() {var o = window.event.srcElement;if (o.type === "checkbox") {//第一个参数写up_action的ID，否则就是整个页面刷了
                __doPostBack("up_action", "");}}</script><asp:UpdatePanel ID="up_action" runat="server"><ContentTemplate><asp:TreeView ID="tv_roleaction" runat="server" ShowCheckBoxes="All" CssClass="tn" OnTreeNodeCheckChanged="tv_roleaction_TreeNodeCheckChanged" ShowLines="True" CollapseImageToolTip="折叠"></asp:TreeView></ContentTemplate></asp:UpdatePanel>

 

后台

注：由于页面加载问题，请在关闭或保存页面信息后重新new一下两个私有变量

        private static SysRoleEntity role = new SysRoleEntity();private static List<object> roleaction = new List<object>();protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){//调用递归函数，完成树形结构的生成AddTree(0, (TreeNode)null);tv_roleaction.Attributes.Add("onclick", "postBackByObject()");}}//递归添加树的节点public void AddTree(int ParentID, TreeNode pNode){DataView dvTree = new DataView(SysActionBLL.GetInstance().GetList(""));//过滤ParentID,得到当前的所有子节点dvTree.RowFilter = "[FPARENTACTIONID] = " + ParentID;foreach (DataRowView Row in dvTree){TreeNode Node = new TreeNode();Node.Value = Row["FACTIONID"].ToString();Node.Expanded = true;if (pNode == null){    //添加根节点Node.Text = "<font style='color:gray'>" + Row["FACTIONNAME"].ToString() + "</font>";tv_roleaction.Nodes.Add(Node);}else{   //̀添加当前节点的子节点Node.Text = "<font style='color:gray'>" + Row["FACTIONNAME"].ToString() + "</font>";pNode.ChildNodes.Add(Node);}//判断当前角色是否拥有该权限if (roleaction.Count > 0 && roleaction.Find(p => p.ToString() == Row["FACTIONID"].ToString()) != null){Node.Checked = true;Node.Text = Regex.Replace(Node.Text, @"gray", @"green");}AddTree(Int32.Parse(Row["FACTIONID"].ToString()), Node);     //再次递归
            }}/// <summary>/// 节点的选中事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>protected void tv_roleaction_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e){//设置该节点的属性   变量roleaction的修改if (e.Node.Checked){roleaction.Add(e.Node.Value);e.Node.Text = Regex.Replace(e.Node.Text, @"gray", @"green");}else{roleaction.Remove(e.Node.Value);e.Node.Text = Regex.Replace(e.Node.Text, @"green", @"gray");}SetChildChecked(e.Node);SetParentChecked(e.Node);}//设置该结点的子节点private void SetChildChecked(TreeNode parentNode){foreach (TreeNode node in parentNode.ChildNodes){//子节点是否选并改变颜色node.Checked = parentNode.Checked;if (node.Checked){roleaction.Add(node.Value);node.Text = Regex.Replace(node.Text, @"gray", @"green");}else{roleaction.Remove(node.Value);node.Text = Regex.Replace(node.Text, @"green", @"gray");}if (node.ChildNodes.Count > 0){SetChildChecked(node);}}}//设置该结点的父节点private void SetParentChecked(TreeNode childNode){if (childNode.Parent != null){var ifnochecked = true;//检查父节点下是否有选中的节点foreach (TreeNode node in childNode.Parent.ChildNodes){if (node.Checked){if (roleaction.Where(p => p.ToString().Equals(childNode.Parent.Value)).Count() == 0){roleaction.Add(childNode.Parent.Value);}ifnochecked = false;childNode.Parent.Checked = true;childNode.Parent.Text = Regex.Replace(childNode.Parent.Text, @"gray", @"green");break;}}if (ifnochecked){roleaction.Remove(childNode.Parent.Value);childNode.Parent.Checked = false;childNode.Parent.Text = Regex.Replace(childNode.Parent.Text, @"green", @"gray");}SetParentChecked(childNode.Parent);}}