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前臺只需要放一個 treeview控件就行

后臺

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

bindTree();

}

private void bindTree()

{

DataTable dt = this.GetTreeData();

this.FillNode(dt, null);

}

private void FillNode(DataTable dt, TreeNode node)

{

DataView dv = new DataView(dt);

if (node == null) //根結(jié)點

{

dv.RowFilter = "parentid='0'"; //篩選到根結(jié)點的所有子節(jié)點

}

else //不是根結(jié)點

{

dv.RowFilter = "parentid='" + node.Value + "'"; //篩選對應(yīng)節(jié)點的所有子節(jié)點

}

foreach (DataRowView drv in dv) //遍歷填充節(jié)點的所有子節(jié)點，如果傳入的節(jié)點node為葉子節(jié)點，遍歷要退出，不再進(jìn)行遞歸

{

TreeNode no = new TreeNode(drv["menuname"].ToString(), drv["menuid"].ToString());

FillNode(dt, no); //填充no節(jié)點的子節(jié)點

if (node == null)

{

this.TreeView1.Nodes.Add(no);

}

else

{

node.ChildNodes.Add(no);

}

}

}

private DataTable GetTreeData()

{

string strcnn = ConfigurationManager.ConnectionStrings["treecnn"].ConnectionString;

using (SqlConnection sqlcnn = new SqlConnection(strcnn))

{

SqlCommand sqlcmm = sqlcnn.CreateCommand();

sqlcmm.CommandText = "select * from MenuTree order by parentid,menuorder";

SqlDataAdapter da = new SqlDataAdapter(sqlcmm);

DataSet ds = new DataSet();

da.Fill(ds);

return ds.Tables[0];

}

}

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