[IronPython] Advantage Database ado.net provider difficulties

Hank Fay hank at prosysplus.com
Tue Apr 27 20:25:02 PDT 2010


That's even better than a direction: that's the answer! <s>

Thanks,

Hank

On Tue, Apr 27, 2010 at 11:15 PM, Dino Viehland <dinov at microsoft.com> wrote:

>  My initial guess would be that you want your string literal to be a raw
> string literal.  That is it should have the r prefix such as r”data
> source=…”.  I’m guessing the C# code might have been doing @”data source=…”
> because of the “\n” in the connection string.
>
>
>
> *From:* users-bounces at lists.ironpython.com [mailto:
> users-bounces at lists.ironpython.com] *On Behalf Of *Hank Fay
> *Sent:* Tuesday, April 27, 2010 8:09 PM
>
> *To:* users at lists.ironpython.com
> *Subject:* [IronPython] Advantage Database ado.net provider difficulties
>
>
>
> I'm trying to use the Advantage Database ado.net provider (9.0.2.7)
> working in IronPython (2.6.1003.1).  OS is Win7 x64; IDE is #develop
> 4.0.0.5720.  I'm getting an error that isn't telling me much.  This is based
> on a C# example I have running on the same machine, in VS2010 RTM.
>
>
>
> Here's the code (Advantage.Data.Provider.dll is referenced in the project).
>  It blows up on the last line, with the error noted below the code.  My hope
> is that the error will mean more to those with more experience than I and
> point me in a useful direction.  FYI: the code references a directory as a
> database, and the CommandText selects a field from a DBF that is a free
> table, that is, not part of a VFP database container (if you were to get the
> idea that I'm retreading in IP after 24 years developing in xBase languages,
> you would hit the mark <s>).
>
>
>
> *import* Advantage.Data.Provider
> *from* Advantage.Data.Provider *import* *
>
> _conn = Advantage.Data.Provider.*AdsConnection*("data
> source=c:\\vpme9apps\next\scaledsardine\versionb\xcase;\
> ServerType=local; TableType=CDX")
> _conn.*Open*()
> _cmd = _conn.*CreateCommand*()
> _cmd.CommandText = "select name from ddent"
> _reader = _cmd.*ExecuteReader*()
>
>
>
> And the error:
>
>
>
> Advantage.Data.Provider.AdsException: System error.
>
>    at
> Microsoft.Scripting.Actions.Calls.MethodCandidate+Caller.Call(Object[] args,
> Boolean shouldOptimize)
>
>    at
> IronPython.Runtime.Types.BuiltinFunction+BuiltinFunctionCaller`6[System.Object,System.String,IronPython.Runtime.PythonDictionary,IronPython.Runtime.PythonDictionary,IronPython.Runtime.PythonTuple,System.Int32].Call5(CallSite
> site, CodeContext context, Object func, String arg0, PythonDictionary arg1,
> PythonDictionary arg2, PythonTuple arg3, Int32 arg4)
>
>    at System.Dynamic.UpdateDelegates.UpdateAndExecute7(CallSite site,
> Object arg0, Object arg1, Object arg2, Object arg3, Object arg4, Object
> arg5, Object arg6)
>
>    at IronPython.Runtime.Importer.Import(CodeContext context, String
> fullName, PythonTuple from, Int32 level)
>
>    at IronPython.Runtime.Operations.PythonOps.InitializeModule(Assembly
> precompiled, String main, String[] references)
>
>    at PythonMain.Main()
>
>
>
> tia,
>
>
>
> Hank Fay
>
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>
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