案例:ASP.net案例     状态:不可编辑再运行    进入横版
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AutoPostBack="True" onSelectedIndexChanged="displayMessage" />
 
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<%@ Import Namespace="System.Data" %>
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<script  runat="server">
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sub Page_Load
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if Not Page.IsPostBack then
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   dim mycountries=New DataSet
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   mycountries.ReadXml(MapPath("countries.xml"))
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   rb.DataSource=mycountries
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   rb.DataValueField="value"
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   rb.DataTextField="text"
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   rb.DataBind()
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end if
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end sub
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sub displayMessage(s as Object,e As EventArgs)
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lbl1.text="Your favorite country is: " & rb.SelectedItem.Text
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end sub
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</script>
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<html>
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<body>
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<form runat="server">

 运行结果 
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