在页面中直接使用ScriptManager1 :
/asp:ScriptManager
<br />
省:<asp:DropDownList ID="Province" runat="server" Height="23px"
Width="90px" onselectedindexchanged="Province_SelectedIndexChanged"
AutoPostBack="True">
<asp:ListItem>请选择</asp:ListItem>
</asp:DropDownList>
市:<asp:DropDownList ID="City" runat="server" Height="23px"
Width="95px" onselectedindexchanged="City_SelectedIndexChanged"
AutoPostBack="True">
<asp:ListItem>请选择</asp:ListItem>
</asp:DropDownList>
区:<asp:DropDownList ID="Area" runat="server" Width="90px"
AutoPostBack="True">
<asp:ListItem>请选择</asp:ListItem>
</asp:DropDownList>
</ContentTemplate>
</asp:UpdatePanel>
独立运行是正常的,引用到其他项目里就是整个页面刷新。是web.config里面要设置其他什么东西吗??