Loosing Database Connection When Device Power-off (native Oledb Code)

Hi,

  I experienced this problems on both Windows Mobile 2003 SE and Windows Mobile 5.0.

  Its native development (c++, oledb, atl and mfc).

 

  It's quite simple to reproduce...

1. open a database

2. open a rowset on table A (whatever, valid of course and with both IOpenRowset and ICommandText), read datas and close rowset

3. power off

4. power on

5. try step 2 with another table (failed on openrowset with error 0x80004005) or try table A (sometimes working because of cached memory, sometims failed on Read Datas).

6. being stuck ;-)

 

Our work-around was, in case we loose our connection (identified by error 0x80004005 on openrowset), we close it and re-open database... ugly for sure, but working.

 

What I'm looking now is to use some kind of "detection method" like what people in .Net develoment are using "if ConnectionState.Open <> ...) for reopening my database only on demand...

 

Thanks in advance for any hints,
Fabien.

 



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Ssis Oledb Connection Error Code: 0x80040E21.

howdy,
i have a sqlserver2005 ssis package which connects to a mysql webserver to upload data. i am connecting via mysql oledb connection and am able to test connect ok through the oledb connection manager. However in my ole db destination editor i get an 0x80040E21 error when trying to preview a table . The full error is :

Error at Data Flow Task [Destination - Query [70]]: An OLE DB error has occurred. Error code: 0x80040E21.

Error at Data Flow Task [Destination - Query [70]]: Opening a rowset for "INFORMATION_SCHEMA.address_book" failed. Check that the object exists in the database.
------------------------------
ADDITIONAL INFORMATION:

Exception from HRESULT: 0xC02020E8 (Microsoft.SqlServer.DTSPipelineWrap)

I can see all the tables in the drop down box in connection manager. This has been driving me nuts for the last 3 days! I have tried changing some of the security connection settings to no avail, (although i am not sure on what these do).I have also tried setting up as an odbc connection using script components but had memory errors after copying several hundred records and the package just hangs. I can go into this in more detail however i dont think they are related issues and i would prefer oledb as i dont have to script my data transfer.

any help much much appreciated.

thanks

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Does anyone know how to resolve this problem?

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Hi List
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Variable Value:       C:Microsoft Project REALETL
 
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First read enviroment variable to get location of config file
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Source database is called "SnapshotABC"
 

the Source database OLEDB connection works 100%
however the destination OLDB connection we get this error below
PS--Both source and destination databases are on the same development machine , however both databases are restored bak files from another production machine



 



Error 1 Error loading LoadGroup_Daily.dtsx: SSIS Error Code DTS_E_OLEDBERROR.  An OLE DB error has occurred. Error code: 0x80004005.  An OLE DB record is available.  Source: "Microsoft SQL Native Client"  Hresult: 0x80004005  Description: "Login failed for user 'xxxxxx'.".  An OLE DB record is available.  Source: "Microsoft SQL Native Client"  Hresult: 0x80004005  Description: "Cannot open database "DataWarehouseABC" requested by the login. The login failed.". 
 
 
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here is a simple example...
 
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Installed programs
visual c++ 9.0
sql server ce books online
sql server ce 3.5 runtime
sql server ce 3.5 server tools
windows xp sp2


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Hi all,

We recently converted an application from accecc97 to access2003.
We used to have 2 databases : 1 with all and only the data (axelD.mbd), 1 with all the forms, query's, ... (axelP.mdb)

We replaced the data (axelD.mdb) with an MSDE database, through UPSIZE and so on. That all worked fine.
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Public Function TestBestellingen()
Dim sql As String
Dim intervalset As DAO.Recordset
Dim planset As DAO.Recordset
Dim tellerke

x = Opendatabases()
tellerke = 0
sql = "Select bestelnummer from vkpbestellijn where bestelnummer > 100000"
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planset.MoveNext
Loop
End Function

Function IsKlantStof(p_bestelnummer)
Dim sql As String, rst As DAO.Recordset
Dim hulp_klantstof As Boolean

hulp_klantstof = False
x = Opendatabases()
sql = "select klantstof from vkpbestellijn where bestelnummer = " & p_bestelnummer
Set rst = Db_AxelP.OpenRecordset(sql, dbOpenSnapshot)

With rst
Do While Not .EOF
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End If
.MoveNext
Loop
End With
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End Function

Function Opendatabases()
If Db_AxelP Is Nothing Then
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End If
End Function
I know this code makes no sence in a real-time environment, but it was to reproduce the error.
This code basically runs trough a 30.000 records and does a little check for certain fields
After 1981 records we get the above error.
(sometimes after 1979 or 1980 or 1982 records)


1977 - 100859 --> True
1978 - 100860 --> True
1979 - 100860 --> False
1980 - 100861 --> True
1981 - 100861 --> True


"vkpbestellijn" is a table that is linked in the AxelP.mdb trough an ODBC connection.
We get the same error (and after 1981 times) if I change the where to a totally other range of "bestelnummer"

I have installed the latest patches of Jet 4.0, MSDE-server, ...

I've been searching the internet for abour 3 days now, and just cant even find the smallest clue what could make this happen.

I hope someone here has an idea.
If you need more details, just ask.

tia,
Axel.

P.S. I'm from Belgium, so my english aint "correct to the point".

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    "Server=192.168.1.128SQLX; Database=mydb; Network=dbmssocn; Integrated Security=SSPI "

But then adding the SQL port 1433 works for the default:

    "Server=MYSRVR,1433; Database=mydb; Network=dbmssocn; Integrated Security=SSPI "

    "Server=192.168.1.128,1433; Database=mydb; Network=dbmssocn; Integrated Security=SSPI "

But this, for named (SQL 2005) actually connects to default. The SQL port is causing the name SQLX to be ignored.

    "Server=MYSRVRSQLX,1433; Database=mydb; Network=dbmssocn; Integrated Security=SSPI "

    "Server=192.168.1.128SQLX,1433; Database=mydb; Network=dbmssocn; Integrated Security=SSPI "

Anyone any ideas?

 

 

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