c# 从XML读数据

C#
 DataSet ds = new DataSet();
ds.ReadXml(Server.MapPath("~/Config/User_yhlx_Jb.xml"));
DataView dv = ds.Tables[0].DefaultView;
//dv.RowFilter = "State=0";
this.DropDownList1.DataSource = dv;
this.DropDownList1.DataTextField = "text";
this.DropDownList1.DataValueField = "value";
this.DropDownList1.DataBind();
XML
<?xml version="1.0" encoding="utf-8" ?>
<selects>
<select>
<text>国家级</text>
<value>1</value>
</select>
<select>
<text>省级</text>
<value>2</value>
</select>
<select>
<text>市级</text>
<value>3</value>
</select>
</selects>