html Select - .NET¼¼Êõ / ASP.NET

HTML code:
<select id="sheng" runat="server" onchange="changsheng(this.value)">
</select>
<select id="city" runat="server">
</select>

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sheng.Value = ds.Tables[0].Rows[0]["City"].ToString();
  city.Value = ds.Tables[0].Rows[0]["Province"].ToString();
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http://download.csdn.net/source/740831

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HTML code:

<select id="Select1" runat="server">
</select>




C# code:

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{