<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:DropDownList ID="ddlProvince" runat="server">
</asp:DropDownList>
<asp:DropDownList ID="ddlCity" runat="server">
</asp:DropDownList>
<asp:DropDownList ID="ddlVilliage" runat="server">
</asp:DropDownList>
<ajax:CascadingDropDown ID="CascadingDropDown2" runat="server" TargetControlID="ddlProvince" ServicePath="~/SNWebService.asmx" ServiceMethod="GetProvinceContents" Category="Province" PromptText="请选择省份" LoadingText="省份加载中...">
</ajax:CascadingDropDown>
<ajax:CascadingDropDown ID="CascadingDropDown1" runat="server" ParentControlID="ddlProvince" ServicePath="~/SNWebService.asmx" ServiceMethod="GetCityContents" Category="City" TargetControlID="ddlCity" PromptText="请选择城市" LoadingText="城市加载中...">
</ajax:CascadingDropDown>
<ajax:CascadingDropDown ID="CascadingDropDown3" runat="server" Category="Villiage" LoadingText="区县加载中..."
ParentControlID="ddlCity" PromptText="请选择区县" ServiceMethod="GetViliageContents"
ServicePath="~/SNWebService.asmx" TargetControlID="ddlVilliage">
</ajax:CascadingDropDown>
</ContentTemplate>
</asp:UpdatePanel>
前台代码 路径也没问题
报错method error 12030
请大侠帮忙 在线等