递归算法实现树型菜单

  ///


  /// 递归构建节点树
  ///
 
  private void CreateNode(string id,TreeNode td)
  {
   Microsoft.Web.UI.WebControls.TreeNode tempNode=null;
   string selectString=null;
   string strNodeText=null;
   string strChildId=null;

   selectString="Menu_Parent=" + id + ""; 

   DataRow[] dataRows = treeDataSet.Tables["menuTable"].Select(selectString); //搜索当前节点的所有子节点

   foreach(DataRow dr in dataRows)
   {
    tempNode = new Microsoft.Web.UI.WebControls.TreeNode();
    strNodeText = dr["Menu_Name"].ToString();
    strChildId = dr["id"].ToString();
    tempNode.Text = strNodeText;
    td.Nodes.Add(tempNode);   //添加子节点
    CreateNode(strChildId,tempNode);
   }
  }

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