Changed database from SQL Server 2005 to SQL Server 2008

Question

I changed my database from SQL Server 2005 to SQL Server 2008 and now I'm having this error message. The site was working perfectly before changing the database

Server Error in '/' Application.

Compilation Error

Description: An error occurred during the compilation of a resource required
             to service this request. Please review the following specific
             error details and modify your source code appropriately. 

Compiler Error Message: CS0116: A namespace cannot directly contain members
                                such as fields or methods

Source Error:    

Line 1:  App_Web_clientusing System;
Line 2:  using System.Collections;
Line 3:  using System.Configuration;

Source File: Default.aspx.cs    Line: 1 

Thanks

EDIT

Default.aspx.cs

App_Web_clientusing System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using SubSonic.Generated;
using SubSonic;
using HrcaPortal;


public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DisablePageCaching();
    }

    protected override void OnPreRender(EventArgs e)
    {
        int pageId = 0;
        int.TryParse(Request.QueryString["pageId"], out pageId);
        if (pageId > 0)
        {
            DataSet ds = HRCAWS.Admin.Misc.GetCommonPageContent(5);
            if (ds.Tables.Count > 0)
            {
                if (ds.Tables[0].Rows.Count > 0)
                {
                    DataTable dt = ds.Tables[0];
                    if (!dt.Rows[0].IsNull(0))
                    {
                        if (Convert.ToInt32(dt.Rows[0]["specialpageid"]) == pageId)
                            Response.Redirect("SendInquiryForPdSubs.aspx", true);
                    }
                }
            }
            PortalContentPage page = new PortalContentPage(pageId);
            //DataSet ds = PortalContentController.GetPortalMenuDS();
            //if (ds.Tables.Count > 0)
            //{
            //    if (ds.Tables[0].Rows.Count > 0)
            //    {
            //        DataTable dt = ds.Tables[0];
            //        DataRow[] dra = dt.Select("pageId = " + pageId);
            //        if (dra.Length > 0)
            //        {
                        ContentPane.InnerHtml = "<h1 id='title'>" + page.Title + "</h1>";
                        //use unescape as a decoding facility if you have used javascript string escape function to encode the html
                        ContentPane.InnerHtml += Microsoft.JScript.GlobalObject.unescape(page.Content);
            //        }
            //    }
            //}
        }
        else
        {
            DataSet ds = HRCAWS.Admin.Misc.GetCommonPageContent(4);
            if (ds.Tables.Count > 0)
            {
                if (ds.Tables[0].Rows.Count > 0)
                {
                    DataTable dt = ds.Tables[0];
                    ContentPane.InnerHtml = "<h1 id='title'>" + dt.Rows[0]["title"].ToString() + "</h1>";
                    ContentPane.InnerHtml += Microsoft.JScript.GlobalObject.unescape(dt.Rows[0]["content"].ToString());
                }
            }
        }

        base.OnInit(e);
    }

    public static void DisablePageCaching()
    {
        //Used for disabling page caching
        HttpContext.Current.Response.Cache.SetExpires(DateTime.UtcNow.AddDays(-1));
        HttpContext.Current.Response.Cache.SetValidUntilExpires(false);
        HttpContext.Current.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
        HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
        HttpContext.Current.Response.Cache.SetNoStore();
        HttpContext.Current.Response.Cache.SetNoServerCaching();
        HttpContext.Current.Response.Cache.SetSlidingExpiration(false);
        HttpContext.Current.Response.Cache.SetAllowResponseInBrowserHistory(false);
    }
}

If I used using system I get the error below:

Login failed for user 'sa'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Data.SqlClient.SqlException: Login failed for user 'sa'.

Source Error: 


Line 44:            string parentIdCol, pageNameCol, pageIdCol, pageTypeCol, pageContentCol;
Line 45: 
Line 46:            DataSet ds = Gen.SPs.GetAllPortalMenuItems(true).GetDataSet();
Line 47: 
Line 48:            ds.DataSetName = "MenuItems";

Source File: App_Code\PortalContentController.cs    Line: 46 

Answer 1

This is zero to do with a database engine migration - it's the code causing the application to appear broken as it can't compile. Look at the error message and surrounding information and there is more than enough information to diagnose and fix this. That is, correcting your usings: App_Web_clientusing System; is invalid.

Answer 2

Just change the following

App_Web_clientusing System;

to

using System;