Chào các bạn,
Mình đang làm một website nhỏ với C# trong visual studio 2013 và dùng local database, file data.mdf chứa trong thư mục app_data

<connectionStrings>
<add name="ApplicationServices" connectionString="data source=(localdb)\v11.0;integrated security=SSPI;attachdbfilename=|DataDirectory|\asp netdb.mdf" providerName="System.Data.SqlClient" />
<add name="thietbiConnectionString" connectionString="Data Source=(localdb)\v11.0;AttachDbFilename=|DataDirec tory|\thietbi.mdf;Integrated Security=True;Connect Timeout=120" providerName="System.Data.SqlClient" />
</connectionStrings>
- mình build trên vs thì chạy ok, nhưng khi publish ra localhost thì báo lỗi không chạy được:


HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information:
Module IIS Web Core
Notification BeginRequest
Handler Not yet determined
Error Code 0x80070021
Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".
Config File \\?\C:\inetpub\wwwroot\device\web.config
Requested URL http://localhost:80/device/
Physical Path C:\inetpub\wwwroot\device\
Logon Method Not yet determined
Logon User Not yet determined

Config Source:
98: </modules>
99: <handlers>
100: <add type="DevExpress.Web.ASPxUploadProgressHttpHandler , DevExpress.Web.v14.2, Version=14.2.3.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" verb="GET,POST" path="ASPxUploadProgressHandlerPage.ashx" name="ASPxUpload
Nhờ các bạn hướng dẫn cách khắc phục, thanks.