关于dropdown调用XML 绑定数据

dripdown 调用 XML中的数据
//在Web层中 XML文件夹添加 FacilityType.xml 如下：
<?xml version="1.0" encoding="utf-8" ?>
<FacilityType>
  <Type id="1" name="类型一"/>
  <Type id="1" name="类型二"/>
  <Type id="1" name="类型三"/>
</FacilityType>
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//在Model层中添加FacilityType1Entity.cs 如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Model
{
    public class FacilityType1Entity
    {
 private string _Name = string.Empty;

 public string Name
 {
     get { return _Name; }
     set { _Name = value; }
 }

    }
}

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//在Web层中public class PageBase : System.Web.UI.Page 添加如下：
/// <summary>
/// 获取项目设施类型
/// </summary>
/// <returns></returns>
public List<FacilityType1Entity> GetAllFacilityType()
{
List<FacilityType1Entity> list = new List<FacilityType1Entity>();
string filePath = Server.MapPath("~/XML/FacilityType.xml");
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(filePath);
XmlNodeList nodelist = xmlDoc.SelectSingleNode("FacilityType").ChildNodes;
foreach (XmlNode node in nodelist)
{
string name = node.Attributes["name"].Value;
FacilityType1Entity typeing = new FacilityType1Entity();
typeing.Name = name;
list.Add(typeing);
}
 return list;
}

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//在窗体FactorsAdd.aspx前台添加dropdown控件 如下:
<tr style="padding-bottom:10px">
 <td class="style1">项目设施类型<span class="needInput"></span></td>
 <td class="style2">
 <asp:DropDownList ID="ddlType" οnclick="ClearErrColor(this.id)" οnblur="checkFacilityType(this.value)" οnfοcus="ClearErrColor(this.id)" runat="server" Width="196px"  CssClass="input_style">
 </asp:DropDownList>
 </td>
</tr>   

该窗体后台添加如下：
/// <summary>
 /// 页面初始化
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void Page_Load(object sender, EventArgs e)
 {
     //第一次加载
     if (!IsPostBack)
     {
       //加载下拉框
       DataBaseLoad();
     }
 }

 /// <summary>
 /// 加载下拉框信息
 /// </summary>
 protected void DataBaseLoad()
 {
     try
     {
  PageBase bdvFacilityTypeList = new PageBase();

  //项目设施类型列表
  ddlType.DataSource = bdvFacilityTypeList.GetAllFacilityType();
  ddlType.DataTextField = "name";   //上面再PageBase中GetAllFacilityType中的string name = node.Attributes["name"].Value;
  ddlType.DataBind();

  //添加默认选择项
  ListItem _liType = new ListItem();
  _liType.Text = "";    // _liType.Text = "请选择类型"; 这只是显示的标题
  _liType.Value = "";    // _liType.Value = "请选择类型的值"; 这才是该标题对应的值
  ddlType.Items.Insert(0, _liType);
  ddlType.SelectedValue = "";  //设置默认选择项 ddlType.SelectedValue = "请选择类型的值"; 这才是该标题对应的值

     }
     catch
     {
  Alert(upFacilityAdd, GetMessage("LOAD_ERROR"));
     }
 }