.net 读取Xml文件并进行DropDownList数据绑定

页面：

 <asp:DropDownList ID="compactType" runat="server" AutoCallBack="True" Width="153px"> </asp:DropDownList>

xml：

<?xml version="1.0" encoding="utf-8" ?>
<roots>
<root>
  <id>1</id>
  <Culture>初中以下</Culture>
</root>
<root>
  <id>2</id>
  <Culture>初中</Culture>
</root>
<root>
  <id>3</id>
  <Culture>中专</Culture>
</root>
<root>
  <id>4</id>
  <Culture>高中</Culture>
</root>
<root>
  <id>5</id>
  <Culture>大专</Culture>
</root>
<root>
  <id>6</id>
  <Culture>本科</Culture>
</root>

</ roots>

c#后台：

/// <summary>
  /// 读取xml文件,用数据填充DropDownList,进行绑定
  /// </summary>
  /// <param name="path">xml文件路径</param>
  /// <param name="dp">要进行绑定的DropDownList名称</param>
  /// <param name="id">DropDownList要显示的文本(xml文件的一个节点)</param>
  /// <param name="val">DropDownList要显示的值(xml文件的一个节点)</param>
  public void ReadXml(string path,DropDownList dp,string id,string val)
  {
    DataSet ds = new DataSet();
    ds.ReadXml(path);
    dp.DataSource = ds;     
    dp.DataTextField = id ;
    dp.DataValueField = val;
    dp.DataBind();     

  } 

SecurityFactory sf = new SecurityFactory();
string path2 = Server.MapPath("./xml/XMLFile2.xml");//xml文件路径
sf.ReadXml(path2, this.compactType, "id", "val");