TreeView(递归)(转)
代码：
<html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div style="text-align:center;"> <div style="margin:5px; float:left;"><asp:TreeView runat="server" ID="Tree1"></asp:TreeView></div> <div style="margin-left:12px;"><asp:GridView runat="server" ID="GridView1"></asp:GridView></div> </div> </form></body></html>
public partial class InfoSort : System.Web.UI.Page
{
DataSet ds = null;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindData();
loadtree();
}
}
private void loadtree()
{
Tree1.Nodes.Clear();
ds = GetDataSet("SELECT * FROM sort");
InitTree(Tree1.Nodes, 0);
}
private void InitTree(TreeNodeCollection Nds,int parentid)
{
DataView dv = new DataView();
TreeNode tmpNd = null;
dv.Table = ds.Tables[0];
dv.RowFilter = String.Format("parentid={0}", parentid);
foreach (DataRowView drv in dv)
{
tmpNd = new TreeNode();
tmpNd.Text = (string)drv["sortname"];//节点名称
tmpNd.NavigateUrl = String.Format("?id={0}", drv["id"]);//节点URL
//tmpNd.ImageUrl = ""; //节点图片
if (parentid == 0)
tmpNd.Expanded = true;
else
tmpNd.Expanded = false;
Nds.Add(tmpNd);
InitTree(Nds[Nds.Count - 1].ChildNodes, (int)drv["id"]);
}
}
private void BindData()
{
GridView1.DataSource = GetDataSet("select * from sort");
GridView1.DataBind();
}
#region Dal
private OleDbConnection GetConn
{
get
{
string path = Server.MapPath("App_Data/Database2.mdb");
string _connStr = String.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}", path);
return new OleDbConnection(_connStr);
}
}
private DataSet GetDataSet(string sql)
{
OleDbConnection _conn = null;
OleDbDataAdapter odda = null;
DataSet ds = null;
try
{
ds = new DataSet();
_conn = GetConn;
_conn.Open();
odda = new OleDbDataAdapter(sql, GetConn);
odda.Fill(ds);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
if (odda != null)
odda.Dispose();
if (_conn != null)
{
_conn.Close();
_conn.Dispose();
}
}
return ds;
}
#endregion
}
{ DataSet ds = null; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { BindData(); loadtree(); } } private void loadtree() { Tree1.Nodes.Clear(); ds = GetDataSet("SELECT * FROM sort"); InitTree(Tree1.Nodes, 0); } private void InitTree(TreeNodeCollection Nds,int parentid) { DataView dv = new DataView(); TreeNode tmpNd = null; dv.Table = ds.Tables[0]; dv.RowFilter = String.Format("parentid={0}", parentid); foreach (DataRowView drv in dv) { tmpNd = new TreeNode(); tmpNd.Text = (string)drv["sortname"];//节点名称 tmpNd.NavigateUrl = String.Format("?id={0}", drv["id"]);//节点URL //tmpNd.ImageUrl = ""; //节点图片 if (parentid == 0) tmpNd.Expanded = true; else tmpNd.Expanded = false; Nds.Add(tmpNd); InitTree(Nds[Nds.Count - 1].ChildNodes, (int)drv["id"]); } } private void BindData() { GridView1.DataSource = GetDataSet("select * from sort"); GridView1.DataBind(); } #region Dal private OleDbConnection GetConn { get { string path = Server.MapPath("App_Data/Database2.mdb"); string _connStr = String.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}", path); return new OleDbConnection(_connStr); } } private DataSet GetDataSet(string sql) { OleDbConnection _conn = null; OleDbDataAdapter odda = null; DataSet ds = null; try { ds = new DataSet(); _conn = GetConn; _conn.Open(); odda = new OleDbDataAdapter(sql, GetConn); odda.Fill(ds); } catch (Exception ex) { throw new Exception(ex.Message); } finally { if (odda != null) odda.Dispose(); if (_conn != null) { _conn.Close(); _conn.Dispose(); } } return ds; } #endregion }
