config这个类是从哪个命名空间里引用过来的

[dongjunjie]

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Microsoft.Web.UI.WebControls;

namespace tree
{
/// <summary>
/// tree_Left 的摘要说明。
/// </summary>
public class tree_test : System.Web.UI.Page
{
protected Microsoft.Web.UI.WebControls.TreeView TreeView1;
protected System.Web.UI.WebControls.Label lbl_Curnodeid;
protected config conn=new config();
--------------------------------------

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 (!Page.IsPostBack)
{
string str_Sql="select * from t_tree order by order_id";
if (conn.GetRowCount(str_Sql)>0) // 遍历树
{
conn.BindTreeView1("nodeid","parentid","location","mytext",str_Sql,"mainFrame","tree_Operate.aspx",lbl_Curnodeid,TreeView1);

}
}
}

#region Web Form Designer generated code
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
private void TreeView_Selected(object sender, Microsoft.Web.UI.WebControls.TreeViewSelectEventArgs e)
{
lbl_Curnodeid.Text = ((TreeNode)TreeView1.GetNodeFromIndex(e.NewNode)).NodeData;
}
private void Page_Unload(object sender, System.EventArgs e)
{
conn.Close();
}

}

}