怎样把两个表的数据用TreeView显示出来???急,在线等，请高手帮忙

Question

有三个表,分别存放第一级目录,第二级目录和第三级目录我现在要把第二级目录的数据显示为根目录，然后子目录是其对应的三级目录，该怎么办？？最好能给我一个源代码，谢谢了我用的是c#

Answer 1

private void CreateTree(TreeNodeCollection folderTreeNodeCollection ,int parentID)         {                  dv.RowFilter= "ParentFolderID="+parentID;              int tmpParentFolderID=0;              foreach(DataRowView drv in  dv)              {                   TreeNode tn=new TreeNode();                   tn.ID=drv.Row["FolderID"].ToString();                   tn.Text=drv.Row["FolderName"].ToString().Trim();                   tmpParentFolderID=Int32.Parse(drv.Row["ParentFolderID"].ToString().Trim());                   //tn.CheckBox=true;                   folderTreeNodeCollection.Add(tn);                                      CreateTree(folderTreeNodeCollection[folderTreeNodeCollection.Count - 1].Nodes,Int32.Parse(tn.ID));              }                             }