怎样用代码给treeView添加父节点和子节点

Question

就是像菜单一样，父节点绑定中国（国家表），子节点绑定山西（省份表），子孙节点绑定太原（市区表）！用代码实现。

Answer 1

....父节点绑定中国（国家表），子节点绑定山西（省份表），子孙节点绑定太原（市区表）
还分三个表.....
三个表结构是:
id name parentid
吧
循环递归慢慢找吧

Answer 2

 DataTable dtlModel = new DataTable();
        private void CreateData() {
            dtlModel.Columns.Add("id", typeof(Int32));
            dtlModel.Columns.Add("pid", typeof(Int32));
            dtlModel.Columns.Add("name");            for (int i = 1; i < 6; i++) {
                DataRow dr = dtlModel.NewRow();
                dr["id"] = i;
                dr["pid"] = 0;
                dr["name"] = i.ToString();
                dtlModel.Rows.Add(dr);
                for (int j = 1; j < 6; j++) {
                    DataRow dr1 = dtlModel.NewRow();
                    dr1["id"] = int.Parse(i.ToString() + j.ToString());
                    dr1["pid"] = i;
                    dr1["name"] = i + "_" + j;
                    dtlModel.Rows.Add(dr1);
                    for (int k = 1; k < 6; k++) {
                        DataRow dr2 = dtlModel.NewRow();
                        dr2["id"] = int.Parse(i.ToString() + j.ToString() + k.ToString());
                        dr2["pid"] = dr1["id"];
                        dr2["name"] = i + "_" + j + "_" + k;
                        dtlModel.Rows.Add(dr2);
                    }
                }
            }
        }        private void BindTree(DataRow[] rows, TreeNode node) {
            foreach (DataRow r in rows) {
                if (r["pid"] == DBNull.Value)
                    continue;                //如果是根结点，添加到TreeView控件
                if (r["pid"].ToString() == "0") {
                    TreeNode node1 = new TreeNode();
                    node1.Text = string.Format("<input name='hd_{0}' type='hidden' value='{1}'/>{2}", r["id"], r["id"], r["name"].ToString());
                    node1.Value = r["id"].ToString();
                    
                    //node1.Target = "top";
                    TreeView1.Nodes.Add(node1);
                    BindTree(dtlModel.Select("pid=" + r["id"]), node1);
                }
                else if (node != null) {//否则添加到当前结点
                    TreeNode node1 = new TreeNode();
                    node1.Text = string.Format("<input name='hd_{0}' type='hidden' value='{1}'/>{2}", r["id"], r["id"], r["name"].ToString());
                    node1.Value = r["id"].ToString();
                    //node1.Target = "top";
                    node.ChildNodes.Add(node1);
                    BindTree(dtlModel.Select("pid=" + r["id"]), node1);//递归生成子树
                }
            }
        }