asp.net 读取Xml文件并进行DropDownList数据绑定

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

<?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>

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