Hi;

I have the following code:
DataTable table = DbProviderFactories.GetFactoryClasses();
foreach (DataRow row in DbProviderFactories.GetFactoryClasses().Rows)
DbProviderFactory providerFactory = DbProviderFactories.GetFactory(row);

The DbProviderFactories.GetFactory(row) throws an exception when the row has
the values: "SQL Server CE Data Provider", ".NET Framework Data Provider for
Microsoft SQL Server 2005 Mobile Edition", "Microsoft.SqlServerCe.Client",
"Microsoft.SqlServerCe.Client.SqlCeClientFactory,
Microsoft.SqlServerCe.Client, Version=9.0.242.0, Culture=neutral,
PublicKeyToken=89845dcd8080cc91"

The exception is:
System.Configuration.ConfigurationErrorsException was unhandled
Message="Failed to find or load the registered .Net Framework Data
Provider."
Source="System.Data"
BareMessage="Failed to find or load the registered .Net Framework Data
Provider."
Line=0
StackTrace:
at System.Data.Common.DbProviderFactories.GetFactory(DataRow
providerRow)
at DbTest.Program.Main(String[] args) in
c:\src\MyWordAddin\DbTest\Program.cs:line 17
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence
assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()


What is going on?

--
thanks - dave

Hi dave,

Based on my research, the Microsoft.SqlServerCe.Client assembly is
installed with SQL Server 2005 and VS.NET 2005. However, it was not
registered to the GAC. The assembly is at C:\Program Files\Microsoft Visual
Studio 8\Common7\IDE\Microsoft.SqlServerCe.Client.dll. You can add this to
GAC, so your code will run fine.

HTH.

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

Also Microsoft.SqlServerCe.Client.dll is not supported and hence not
documented. You can check the following link for more information.

http://forums.microsoft.com/MSDN/Sho...24762&SiteID=1

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

Hello;

My concern is this call throwing an exception on user's systems. And I can't
tell them all to fix how the Sql Server CE client was installed. How can I
determine if I can call GetFactory() for a given row?

I don't want to have a try/catch because I think it is very poor programming
practice to have exceptions thrown &and caught) when the program is operating
normally.

--
thanks - dave


"Kevin Yu [MSFT]" wrote:

> Hi dave,
>
> Based on my research, the Microsoft.SqlServerCe.Client assembly is
> installed with SQL Server 2005 and VS.NET 2005. However, it was not
> registered to the GAC. The assembly is at C:\Program Files\Microsoft Visual
> Studio 8\Common7\IDE\Microsoft.SqlServerCe.Client.dll. You can add this to
> GAC, so your code will run fine.
>
> HTH.
>
> Kevin Yu
> =======
> "This posting is provided "AS IS" with no warranties, and confers no
> rights."
>
>

You can check the content of the rows and skip Microsoft.SqlServerCe.Client.

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

Hi;

I don't think that is a good solution. If they have Ce.Client installed,
then I don't want to skip it.

And what if they have another client that throws an exception?

I want to know how to avoid calling this methid fi, and only if, it will
throw an exception.

--
thanks - dave


"Kevin Yu [MSFT]" wrote:

> You can check the content of the rows and skip Microsoft.SqlServerCe.Client.
>
> Kevin Yu
> =======
> "This posting is provided "AS IS" with no warranties, and confers no
> rights."
>
>

Hi dave,

The information is located in the machine.config file under
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG folder. Here is an
example.

<system.data>
<DbProviderFactories>
<add name="Odbc Data Provider" invariant="System.Data.Odbc"
description=".Net Framework Data Provider for Odbc"
type="System.Data.Odbc.OdbcFactory, System.Data, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<add name="OleDb Data Provider" invariant="System.Data.OleDb"
description=".Net Framework Data Provider for OleDb"
type="System.Data.OleDb.OleDbFactory, System.Data, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<add name="OracleClient Data Provider"
invariant="System.Data.OracleClient" description=".Net Framework Data
Provider for Oracle" type="System.Data.OracleClient.OracleClientFactory,
System.Data.OracleClient, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089" />
<add name="SqlClient Data Provider" invariant="System.Data.SqlClient"
description=".Net Framework Data Provider for SqlServer"
type="System.Data.SqlClient.SqlClientFactory, System.Data, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<add name="SQL Server CE Data Provider"
invariant="Microsoft.SqlServerCe.Client" description=".NET Framework Data
Provider for Microsoft SQL Server 2005 Mobile Edition"
type="Microsoft.SqlServerCe.Client.SqlCeClientFactory,
Microsoft.SqlServerCe.Client, Version=9.0.242.0, Culture=neutral,
PublicKeyToken=89845dcd8080cc91" />
</DbProviderFactories>
</system.data>

If other provider need themselves to be enumerated, they need to

1. add themselves to the GAC,
2. add a new node in the machine.config file.

Currently, they best way to workaround this is to use try/catch block. I
don't have other better ways.

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."