C# TreeView生成樹的方法

[轉自：http://hi.baidu.com/xuzhaoshuai128/blog/item/b3b83b9a8cc869046f068c11.html]

private void CreateTree()
        {
            //獲取根節點

            DataSet ds = BLL.OperatorManager.GetSubjectData(sqlcon);//調用BLL層獲取根節點方法
            DataTable table = ds.Tables[0];
            TreeNode tnNew = null;
            //循環遍歷根節點

            for (int i = 0; i < table.Rows.Count; i++)
            {
                string cCode_Cname = Convert.ToString(table.Rows[i].ItemArray.GetValue(0));//根節點名稱

                string cCode_id = Convert.ToString(table.Rows[i].ItemArray.GetValue(1));//根節點編碼

                tnNew = this.tvwSubjects.Nodes.Add(cCode_id, cCode_id + cCode_Cname);
                tnNew.Tag = cCode_id;
                CreateTreeNode(ref tnNew, ref cCode_id);//調用生成子節點方法進行遞歸
            }
        }
        //生成子節點方法

        private void CreateTreeNode(ref TreeNode tr ,ref string id)
        {
            //根據根節點獲取子節點
            DataSet ds = BLL.OperatorManager.GetSubjectSon(id,sqlcon);//調用BLL層獲取子節點方法
            if (ds!= null)//判斷是否還具有子節點
            {
                TreeNode tnNew = null;
                DataTable table= ds.Tables[0];
               
                for (int k = 0; k < table.Rows.Count; k++)
                {
                    string cCode_Cname = Convert.ToString(table.Rows[k].ItemArray.GetValue(0));//子節點名稱

                    string cCode_id = Convert.ToString(table.Rows[k].ItemArray.GetValue(1));//子節點編碼

                   tnNew = tr.Nodes.Add(cCode_id, cCode_id + cCode_Cname);
                   tnNew.Tag = cCode_id;
                   CreateTreeNode(ref tnNew, ref cCode_id);
                }　
            }
         }

直接調用 CreateTree();即可