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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 tableA (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 develomentare using "if ConnectionState.Open <> ...) for reopening my database only on demand...



Thanks in advance for any hints,
Fabien.


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"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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I found a peculiar thing today while working with SQL Mobile in a multithreaded application(VS2005, application for Pocket PC 2003).

I created a class which has one SqlCeConnection object. Every time I call a function to insert/select/delete something from the local db, I open the connection, execute the query an then close the connection again.

But when I'm calling a function from the db classin thread 1 and in the meantime call a different function (from the same db class of course) in thread 2, things go wrong. Because when function 1 wants to close the connection, function 2 is still using the connection and it will crash my application with a native exception (0xC0000005: access violation).

I can see why the error is happening, but shouldn't there be a nice .NET handled exception instead of a native exception which grinds my app to a hold?

(A workaround I use now is to use multiple connection objects instead of one, but I thought I'd give this feedback anyway)

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An Unspecified Error Had Occurred In The Native SQL Server Connection Component.


Hello All,



I need you help badly. Iam a student and iamworking on "Creating a Mobile Application with SQL Server Compact Edition"http://msdn2.microsoft.com/en-us/library/ms171908.aspx. This tutorial works fine until

Create the publication snapshot






In SQL Server Management Studio, in Object Explorer, expand the (local) computer node.


Expand the Local Publications folder, select the publication name, right-click SQLMobile, and then click View Snapshot Agent Status.


In the View Snapshot Agent Status dialog box, click Start.

Make sure that the snapshot job has succeeded before you continue.

When I try to create a snapshot iam getting the following error "An unspecified error had occurred in the native SQL Server connection component." . I have no clue what to do next please help me out.

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This code...

string Path = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
// Create the connection fConnection = new SqlCeConnection("Data Source ="" + Path + "\TreeNotes.sdf" ;Password ="abcd1234";");
fConnection.Open();

...works on my device, but on my computer it gives SqlCeException with message:
The database file cannot be found. Check the path to the database. [ File name = Program FilesTreeNotesTreeNotes.sdf ]

I've tried all sorts of things, but the computer just can't find the database. I've even tried putting a copy of the database into...
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What am I missing?

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Hello,



I try to connect the SQL Server from the mobile device.

my connection string is:

string conn_str = "Server= 10.0.0.11;Database=theDB005;uid=bahadir;pwd=abcd;Trusted_Connection=false;";

when i try to open the connection I get SqlException,altough the 10.0.0.11 machine is reachable.. is not allowed to access a remote sql server with ip?



Thanks in advance.

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Hi,
I'm writing a windows application using VB.NET 2005 that must connect to Pocket PC via ActiveSync to read data from SQL Server CE. This is my code:


Dim cnn As New SqlCeConnection


cnn.ConnectionString = "Data Source =Mobile DeviceStorage CardProgram FilesMyAppMobileDB1.sdf"


cnn.Open()

But I get the following error:

The path is not valid. Check the directory for the database. [ Path = Mobile DeviceStorage CardProgram FilesMyAppMobileDB1.sdf ]

Any help would be greatly appreciated!
Leila

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Hi there,

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I am using the Jet provider and have tried setting the extended properties to all of the DBASE versions and still cannot get it to connect. These files' names are shorter than 8 chars so that issue is no problem in this case.
I can actually get these files to show in a Microsoft Access 2008 database when I import it from there so I know that I must be missing something in my SSIS project.


After doing some reading on this topic, it would seem that this shouldn't be such a schlepp but, here I am

Maybe I need to install some driver or somethin?

Regards
Mike

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If I use an ADO.NET Connection Manager, here is the code in the Source Script Component Public Overrides Sub CreateNewOutputRows()

Code 1

Dim sqlAdapter As New SqlDataAdapter

Dim dataRow As Data.DataRow

Dim ds As DataSet = CType(Me.Variables.rsSomeResultset, DataSet)


sqlAdapter.Fill(ds)



Iget: Error: System.InvalidCastException: Unable to cast object of type 'System.Object' to type 'System.Data.DataSet'.



Code 2

Dim oledbAdapter As New OleDb.OleDbDataAdapter
Dim dataTable As DataTable

oledbAdapter.Fill(dataTable, Me.Variables.rsSomeResultset)

Error: System.ArgumentException: Object is not an ADODB.RecordSet or an ADODB.Record. Parameter name: adodb



It works all right when I use an OLEDB Connection Manager with the second code sample.



Question: In order to extract the maximum performance, wouldn't it be preferred to use ADO.NET with SqlClient Provider in an all SQL Server 2005 environment? Or will an OLEDB Connection provide comparable or equal performance?

If so, what code can I use? Since the recordset returned by the Stored Proc (in the Execute SQL Task) can only be captured in a System.Object variable and you can only use the overload of the Fill() method of the OleDbDataAdapter to accept an ADO Recordset or Record object.

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Thanks, Tom

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Dear all,

we havetables with many image columns. We fill these image columns via ODBC and SQLPutData as described in MSDN etc (using SQL_LEN_DATA_AT_EXEC(...), calling SQLParamData and sending the data in chunks of 4096 bytes when receiving SQL_NEED_DATA).

The SQLPutData call fails under the following conditions with sqlstate 08S01

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- The driver is SQL Native Client
- The table consists e.g. of one Identity column (key column) and nine image columns
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1: 6781262
2: 119454

3: 269
4: 7611

5: 120054

6: 269

7: 8172

8: 120054

9: 269
The content of the data does not matter, (it happens also if only zero bytes are written), nor does the data origin (file or memory).

All data blocks including no 7 are inserted. If the first chunk of data block 8 should be written with SQLPutData the function fails and the connection is broken. There are errors such as "broken pipe" or "I/O error" depending on the used network protocol.

If data no 7 consists of 8173 bytes instead of 8172 all works again.
(Changing the 4096 chunk size length does not help)

Has anybody encountered this or a similar phenomenon?

Thank you

Eartha

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Hello, I have a sql 2005 server, and I am a developer, with the database on my own machine. It alwayws works for me but after some minutes the other developer cant work in the application

He got this error

Login failed for user ''. The user is not associated with a trusted SQL Server connection. [CLIENT: 192.168.1.140]

and When I see the log event after that error, it comes with another error.

SSPI handshake failed with error code 0x8009030c while establishing a connection with integrated security; the connection has been closed. [CLIENT: 192.168.1.140]

He has IIS5 and me too.

I created a user on the domain called ASPSYS with password, then in the IIS on anonymous authentication I put that user with that password, and it works, on both machines.



and in the connection string I have.

<add key="sqlconn" value="Data Source=ESTACION15;Initial Catalog=GescomDefinitiva;Integrated Security=SSPI; Trusted_Connection=true"/>

I go to the profiler, and I see that when he browses a page, the database is accesed with user ASPSYS, but when I browse a page, the database is accesed with user SElevalencia.

Thats strange.

The only way that the other developer can work again on the project is to restart the whole machine. He has windows xp profession, I have windows 2000.

If you want me to send logs please tellme





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But when I try to use the connection in OLE DB Source when I will list the tables I get this error:

Could not retrieve the table information for the connection manager 'MyDataSource'.
truncated. SQLSTATE=01004
CLI0002W Data truncated. SQLSTATE=01004

ADDITIONAL INFORMATION:

truncated. SQLSTATE=01004
CLI0002W Data truncated. SQLSTATE=01004 (IBM OLE DB Provider for DB2 Servers)

2) When I try to use "Microsoft OLE DB Provider for DB2" when I try to test the connection I get this error:

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Anyone had these problems ?

Thanks,

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I am using OLEDB Connection in script component. I get a login failure when I run the package. I use SQL Server authentication. Do you have to use windows authentication in script component? Thanks


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Hello world.

I have a big problem.
Im writing an application in Sql 2005 Etl.
This application use 2 kind of ole db connection. One towards a Sql Server, and the other towards As400
to use ole db towords As400 is necessary to save user and password to connect.
There is a flag to save password.........and obviously a checked it. !!!!!

The problem is:
If I stay inside Visual studio and i use this application.......all is correct.
If I use my application in sql like a job.........loose password information and crash immediatly

someone can help me ?????????

thanks all in advance.
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* Separate application server running Windows Server 2003 - SBS.
Application server uses DCOM and OLEDB to obtain data from SQL Server.

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If not, then they are just trying to put me off and avoid fixing a problem. In this case, I need an authoritative statement as ammunition to take back to their support department.
.... Warren

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Im trying to connecting from SQL 2005(win 64bit server) to a Oracle database viaOLEDBbut get the following message. The OraOLEDB.Oracle.1 provider is not registered on the local machine.

Ifwe try ODBC we get the following message "error in initializing provider. Attemt to load Oracle client libraries threw BadImageFormatException.This problem will occur when running in 64bit mode whit the 32 bit Oracle Client components installed."

It should be the 64 bit client that is installed.

In the test environment (32 bit win) both works.

Pleas help

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i connect to remote Integration Service. i configure server for remote connection( on component services and DCOM config , ... ) .and now i can connect to Integration Service remotely and correctly.



but when i expand Stored Package and then click to expand MSDB this error will hapen:

login failed for user ... .(microsoft sql native client )



please help me



thanks in advance

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