帮忙解决一个网站发布的问题

CS1061: 'ASP.get_mainget_aspx' does not contain a definition for 'ddlCode_TextChanged' and no extension method 'ddlCode_TextChanged' accepting a first argument of type 'ASP.get_mainget_aspx' could be found (are you missing a using directive or an assembly reference?)


Line 33:             <tr>
Line 34:                 <td>产品名称:</td>
Line 35:                 <td><asp:DropDownList ID="ddlCode" runat="server" AutoPostBack="True"  OnTextChanged="ddlCode_TextChanged">
Line 36:                         <asp:ListItem Value="0">--请选择--</asp:ListItem>
Line 37:                         <asp:ListItem Value="1">J28-Enclouse</asp:ListItem>

这个是在IIS发布上报错，在VS中发布是成功的