Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Data.OleDb.OleDbPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.你的错误说的很清楚了,你调用的oledb 没有权限在服务器上
难道一切是因为"免费试用"?
另外,操作access除了写权限外,还要修改权限.(对文件夹的)