今天學習的時候自己寫的無限級分類

EM_Type

EM_id	EM_name	EM_sid	EM_supperid
1	IT設備	0	1
2	辦公用品	0	2
3	聯想主機	1	0
4	聯想顯示器	1	0
5	啓天M8200	3	0
6	啓天M8000	3	0
7	聯想19寸	4	0
8	聯想17寸	4	0
9	聯想19寸液晶	7	0
10	聯想19寸純平	7	0

 

結果

//獲取第一級節點 DataSet ds = cc.GetDS("select * from EM_Type where EM_sid = 0 and EM_supperid<>0", "type"); TreeNode tree1 = new TreeNode("設備分類"); TreeView1.Nodes.Add(tree1); for (int i = 0; i < ds.Tables["type"].Rows.Count; i++) { TreeNode tree2 = new TreeNode(ds.Tables["type"].Rows[i][1].ToString(), ds.Tables["type"].Rows[i][0].ToString()); //tree1.ChildNodes.Add(tree2); treeV(tree2); ///循環獲取2級以下的節點 } private void treeV(TreeNode parent) { DataSet ds = cc.GetDS("select * from EM_Type where EM_sid =" + parent.Value, "Types"); Response.Write("select * from EM_Type where EM_sid =" + parent.Value+"<br />"); if (ds.Tables["Types"].Rows.Count > 0) { for (int i = 0; i < ds.Tables["Types"].Rows.Count; i++) { TreeNode child = new TreeNode(ds.Tables["Types"].Rows[i][1].ToString(), ds.Tables["Types"].Rows[i][0].ToString()); parent.ChildNodes.Add(child); treeV(child); } } }