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


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,

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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" 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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Connection Path OK On Device, Not On Desktop
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(); 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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I try to connect the SQL Server from the mobile device.

my connection string is:

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

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

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Connection From Windows Application To Mobile Device(*.sdf)

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Dim cnn As New SqlCeConnection

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


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!

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Hi there,

I know this has been a topic of discussion before and I have read and tried the suggestions to no avail. I have a few .dbf files to import into my sql database and I know that one needs to make a oledb connection to these files.

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?


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My package needs to be a High Performance (target: 150,000 rows in 30 minutes) ETL solution. We are using all MS technologies - SSIS, SQL 2005, BIDS, etc. I need to loop the recordset executed by a Stored Proc in a Execute SQL Task in a Source Script Component.

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)


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)

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

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1: 6781262
2: 119454

3: 269
4: 7611

5: 120054

6: 269

7: 8172

8: 120054

9: 269
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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


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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.

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truncated. SQLSTATE=01004
CLI0002W Data truncated. SQLSTATE=01004


truncated. SQLSTATE=01004
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.... Warren

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