C# DropDownList 静态绑定XML数据

.aspx

<asp:DropDownList ID="ddl_reason" runat="server" Width="230px" DataSourceID="xmlDS_reason" 
     DataTextField="Text" DataValueField="Value" />

<asp:XmlDataSource ID="xmlDS_reason" runat="server" 
     DataFile="~/imgs/Reason.xml" XPath="/Reasons/Reason" />

Reason.xml

<?xml version="1.0" encoding="utf-8" ?>
<Reasons>
  <Reason Text="原因1" Value="1" />
  <Reason Text="原因2" Value="2" />
</Reasons>