TreeView 使用范例

 using System; using System.Data; using System.Data.SqlClient; using System.Drawing; using System.Web; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls;  using Microsoft.Web.UI.WebControls;

 /// <summary> ///  yellowPageVClassList 的摘要说明。 /// </summary> public class yellowPageVClassList : System.Web.UI.UserControl {  protected Microsoft.Web.UI.WebControls.TreeView TreeView1;  private void Page_Load(object sender, System.EventArgs e)  {   // 在此处放置用户代码以初始化页面      if( !IsPostBack )      {               InitTreeRootNode();      }  }

  /// <summary>  /// 加载商务信息分类树型结构  /// </summary>  /// <param name="nds"></param>  /// <param name="parentID"></param>  private void InitTreeRootNode()  {   try   {        DataView dv = new DataView();    dv = //获取父节点的数据集合(省略);    TreeNode tmpNd;

    foreach( DataRowView drv in  dv )    {     tmpNd = new TreeNode();     tmpNd.Text = "<span οnmοuseοver=javascript:title='"+drv["Name"].ToString()+"'>"+drv["Name"].ToString()+"</span>";     tmpNd.ID = drv["ID"].ToString();     tmpNd.NavigateUrl = "javascript:void(null)";     tmpNd.NavigateUrl = "url?classID=" + drv["ID"].ToString();     TreeView1.Nodes.Add(tmpNd);     InitTreeChildNode(tmpNd,Convert.ToInt32(drv["ID"])); //递归遍历所有子节点    }       }   catch( Exception ex )   {    throw( ex );   }  }

  /// <summary>  /// 加分类树型结构子节点  /// </summary>  /// <param name="nds"></param>  /// <param name="parentID"></param>  private void InitTreeChildNode(TreeNode nds,int parentID)  {   try   {        DataView dv = new DataView();    dv = //根据父节点parentID获取子节点数据集合(省略);    TreeNode tmpNd;

    foreach( DataRowView drv in  dv )    {     tmpNd = new TreeNode();     tmpNd.Text = drv["Name"].ToString();     tmpNd.ID = drv["ID"].ToString();     tmpNd.NavigateUrl = "url?classID=" + drv["ID"].ToString();     nds.Nodes.Add(tmpNd);     InitTreeChildNode(nds,Convert.ToInt32(drv["ID"].ToString()));    }       }   catch( Exception ex )   {    throw( ex );   }  }

  #region Web 窗体设计器生成的代码  override protected void OnInit(EventArgs e)  {   //   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。   //   InitializeComponent();   base.OnInit(e);  }    /// <summary>  ///  设计器支持所需的方法 - 不要使用代码编辑器  ///  修改此方法的内容。  /// </summary>  private void InitializeComponent()  {   this.Load += new System.EventHandler(this.Page_Load);

  }  #endregion }