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protected void Page_Load(object sender, EventArgs e)
{
//绑定数据到ddl省份,城市
if (!IsPostBack)
{
DataTable dt_prov;
dt_prov = spaceList.Get_Province();
ddl_Province.DataSource = dt_prov.DefaultView;
ddl_Province.DataValueField = "ProvinceID";
ddl_Province.DataTextField = "ProvinceName";
ddl_Province.DataBind();
}
}
protected void ddl_Province_SelectedIndexChanged(object sender, EventArgs e)
{
provinceID = Convert.ToInt32(ddl_Province.SelectedValue.Trim().ToString());
dt_city = spaceList.Get_City(provinceID);
ddl_City.DataSource = dt_city.DefaultView;
ddl_City.DataValueField = "CityID";
ddl_City.DataTextField = "CityName";
ddl_City.DataBind();
}
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
所在地区:<asp:DropDownList ID="ddlProvince" Width="80px" runat="server" AutoPostBack="true"
AppendDataBoundItems="True" OnSelectedIndexChanged="ddlProvince_SelectedIndexChanged">
<asp:ListItem Text="全国" Value="-1"></asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="ddlCity" runat="server" AppendDataBoundItems="True" Width="80px">
<asp:ListItem Text="所有地区" Value="-1"></asp:ListItem>
</asp:DropDownList>
</ContentTemplate>
</asp:UpdatePanel>