treeView

Question

请问treeView如果绑定数据表

Answer 1

一般是用TreeNodePopulate事件异步加载 protected void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e)
    {
        try
        {
            if (ViewState["ReceiverList"] != null)
            {
                dtlRec = (DataTable)ViewState["ReceiverList"];
            }
            string groupid = e.Node.Value;
            if (groupid != null && groupid != "")
            {
                Guid id = new Guid(groupid);
                Group group = new Group(id);
                GroupNode(e.Node, group);
            }
            else
            {
                groupid = "00000000-0000-0000-0000-000000000000";
                Guid id = new Guid(groupid);
                Group group = new Group(id);
                GroupNode(e.Node, group);
            }
        }
        catch { }
    } /// <summary>
    /// 获取组节点
    /// </summary>
    /// <param name="Node">树节点</param>
    /// <param name="userInfo">组信息</param>
    protected void GroupNode(TreeNode Node, Group group)
    {
        GroupCollection groups = Groups.GetSubgroups(group);
        foreach (Group g in groups)
        {
            TreeNode groupnode = new TreeNode(g.GroupName, g.GroupID.ToString());
            groupnode.ImageUrl = "~/images/group.gif";
            groupnode.SelectAction = TreeNodeSelectAction.Expand;
            StringBuilder value = new StringBuilder();
            string[] users = Groups.GetUsersInGroup(g);
            for (int i = 0; i < users.Length; i++)
            {
                MembershipUser u = Membership.GetUser(users[i]);
                if (u != null)
                {
                    ManNode(groupnode, u);
                }
            }
            groupnode.Value = "";
            groupnode.ToolTip = value.ToString();
            Node.ChildNodes.Add(groupnode);            Group subgroup = new Group(g.GroupID);
            GroupCollection subgroups = Groups.GetSubgroups(subgroup);
            GroupNode(groupnode, subgroup);
        }    }    /// <summary>
    /// 获取人员节点
    /// </summary>
    /// <param name="Node">树节点</param>
    /// <param name="userInfo">用户信息</param>
    protected void ManNode(TreeNode Node, MembershipUser userInfo)
    {
        string uInfo = userInfo.ProviderUserKey.ToString();
        string uText = userInfo.Comment + "<input style='display:none;' type='text' value='" + uInfo + "' title='" + userInfo.Comment + "'  />";
        TreeNode mannode = new TreeNode(uText, userInfo.ProviderUserKey.ToString());        mannode.ImageUrl = "~/images/user.gif";
        mannode.SelectAction = TreeNodeSelectAction.None;
        Node.ChildNodes.Add(mannode);        if (dtlRec != null && dtlRec.Rows.Count > 0)
        {
            foreach (DataRow rowRec in dtlRec.Rows)
            {
                if (mannode.Value == rowRec["Receiver"].ToString())
                {
                    mannode.Checked = true;
                }
            }
        }
    }