public SetTypeForm(decimal mapid)
        {
            InitializeComponent();

            //DataTable roottable = MapDBClass.GetLayerInformation(mapid);
            //查询影像图结构
            //PhotoList = MapDBClass.GetPhotoList();
            ParentChildTable = MapDBClass.GetLayerInformation(mapid);
            treeView1.Nodes.Clear();
            //if (roottable != null && roottable.Rows.Count == 1)
            //{
            TreeNode rootnode = new TreeNode("基础图层")
            {
                Tag = "0"
            };

            treeView1.Nodes.Add(rootnode);
            AddNode(rootnode);
            treeView1.SelectedNode = rootnode;

            TreeNode rootnode1 = new TreeNode("数据图层")
            {
                Tag = "4"
            };

            treeView1.Nodes.Add(rootnode1);
            AddNode(rootnode1);
            init();//gridview绑定值
        }