利用ASP.NET的menu和SQL数据库制作无限级别菜单

source:internet

using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using WebTools; public partial class Default4 : System.Web.UI.Page {     public int parentID;     public Tools Connectionstr1 = new Tools();     protected void Page_Load(object sender, EventArgs e)     {         string Connectionstr = Connectionstr1.connStr.ConnectionString;          SqlConnection SconnStr = new SqlConnection(Connectionstr);         //设定数据库操作命令          SconnStr.Open();          SqlCommand Scmd = new SqlCommand("select * from menuTable where parentID=0", SconnStr);          SqlDataReader odr = Scmd.ExecuteReader();         while (odr.Read())         {              MenuItem menuNode = new MenuItem();              menuNode.Text = odr["menuName"].ToString();              menuNode.Value = odr["id"].ToString();              menuNode.Enabled = true;              menuNode.Target = odr["target"].ToString();              menuNode.NavigateUrl = odr["url"].ToString();              Menu1.Items.Add(menuNode);              parentID = Convert.ToInt16(odr["id"].ToString());              addchildmenu1(menuNode, menuNode.Value);          }         //关闭数据库连接          Scmd.Connection.Close();      }     protected void addchildmenu1(MenuItem pnode,string pid)     {         string Connectionstr = Connectionstr1.connStr.ConnectionString;          SqlConnection SconnStr1 = new SqlConnection(Connectionstr);         //设定数据库操作命令          SconnStr1.Open();          SqlCommand Scmd1 = new SqlCommand("select * from menuTable where parentID=" + parentID + "", SconnStr1);          SqlDataReader odr = Scmd1.ExecuteReader();         while (odr.Read())         {              MenuItem menuNode = new MenuItem();              menuNode.Text = odr["menuName"].ToString();              menuNode.Value = odr["id"].ToString();              menuNode.Enabled = true;              menuNode.Target = odr["target"].ToString();              menuNode.NavigateUrl = odr["url"].ToString();              pnode.ChildItems.Add(menuNode);              parentID = Convert.ToInt16(odr["id"].ToString());              addchildmenu2(menuNode, menuNode.Value);          }         //关闭数据库连接          Scmd1.Connection.Close();      }     protected void addchildmenu2(MenuItem pnode, string pid)     {         string Connectionstr = Connectionstr1.connStr.ConnectionString;          SqlConnection SconnStr1 = new SqlConnection(Connectionstr);         //设定数据库操作命令          SconnStr1.Open();          SqlCommand Scmd1 = new SqlCommand("select * from menuTable where parentID=" + parentID + "", SconnStr1);          SqlDataReader odr = Scmd1.ExecuteReader();         while (odr.Read())         {              MenuItem menuNode = new MenuItem();              menuNode.Text = odr["menuName"].ToString();              menuNode.Value = odr["id"].ToString();              menuNode.Enabled = true;              menuNode.Target = odr["target"].ToString();              menuNode.NavigateUrl = odr["url"].ToString();              pnode.ChildItems.Add(menuNode);              parentID = Convert.ToInt16(odr["id"].ToString());              addchildmenu1(menuNode, menuNode.Value);          }         //关闭数据库连接          Scmd1.Connection.Close();