根据数据库创建TreeView的方法

数据库结构     ID int(4) 主键    ParentID int(4)     ConText nvchar(50) 均No Null
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函数说明
public void AddTree(int ParentID, TreeNode pNode,TreeView treeView,DataTable dt)
其中treeView为TreeView控件,dt为数据集中的表。

调用示例：

            dt = (DataTable)td.RetiereTree();
            AddTree(0, (TreeNode)null,treeView1,dt);

Vs2005 C# WindowsXp 测试通过。
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public void AddTree( int ParentID, TreeNode pNode,TreeView treeView,DataTable dt)
         {
           
             DataView dvTree = new DataView(dt);
            //过滤ParentID,得到当前的所有子节点
            //dvTree.RowFilter = "[PARENTID] = " + ParentID;
             dvTree.RowFilter = "[PARENTID]=" + ParentID;


            foreach (DataRowView Row in dvTree)
            {
           
                 TreeNode Node = new TreeNode();
                if (pNode == null)
                {    //添加根节点
                     Node.Text = Row["ConText"].ToString();
                     treeView.Nodes.Add(Node);
                    //Node.Expanded = true;
                     AddTree(Int32.Parse(Row["ID"].ToString()), Node,treeView,dt);    //再次递归
                 }
                else
                {   //̀添加当前节点的子节点
                     Node.Text = Row["ConText"].ToString();
                     pNode.Nodes.Add(Node);
                    //Node.Expanded = true;
                     AddTree(Int32.Parse(Row["ID"].ToString()), Node,treeView,dt);     //再次递归
                 }
             }
         }