private void bindTreeView1()
{
string sql = "select * from dm_category";
DataTable dt = db.ExecuteDataTable(sql, CommandType.Text, null);
DataRow[] dr = dt.Select("parent_id is null");
for (int i = 0; i < dr.Length; i++)
{
TreeNode tn = new TreeNode();
tn.Text = dr[i]["category_name"].ToString();
tn.Tag = dr[i]["id"].ToString();
FillTree(tn, dt);
treeView1.Nodes.Add(tn);
}
}
private void FillTree(TreeNode node, DataTable dt)
{
DataRow[] drr = dt.Select("parent_id='" + node.Tag.ToString() + "'");
if (drr.Length > 0)
{
for (int i = 0; i < drr.Length; i++)
{
TreeNode tnn = new TreeNode();
tnn.Text = drr[i]["category_name"].ToString();
tnn.Tag = drr[i]["id"].ToString();
if (drr[i]["parent_id"].ToString() == node.Tag.ToString())
{
FillTree(tnn, dt);
}
node.Nodes.Add(tnn);
}
}
}
