[Mono-list] Why does OleDBFOO not inherit DbFOO

[Atsushi Eno]

Hi,

It is because ADO.NET inheritance model has changed in .net 2.0 and we
haven't finished those classes.

Atsushi Eno

Justin Dearing wrote:
> I have a series of classes that abstract data access in .NET. The
> OleDb class does not work because classes in System.Data.OleDb do not
> seem to inherit the equivilant members in System.Data.Common. Is there
> a reason for this? Is there a know workaround.
> The source code in question is for http://plane-disaster.sf.net. I
> would like to port the app to mono. Although the JetSQL (Microsoft
> Access) support will only work in WIndows barring a total rewrite, and
> the SQLite support does not require OleDb, I would like to understand
> why OleDbFOO classes do not inherit there equivilant DbFOO classes.
>
> Build started.
> C:\src\PlaneDisaster.NET\OleDba.cs(68,9) : Error CS0029: Cannot
> implicitly convert type `System.Data.OleDb.OleDbConnection' to
> `System.Data.Common.DbConnection'
> C:\src\PlaneDisaster.NET\OleDba.cs(137,11) : Error CS0030: Cannot
> convert type `PlaneDisaster.OleDba.Cn' to
> `System.Data.OleDb.OleDbConnection'
> C:\src\PlaneDisaster.NET\OleDba.cs(155,11) : Error CS0030: Cannot
> convert type `PlaneDisaster.OleDba.Cn' to
> `System.Data.OleDb.OleDbConnection'
> C:\src\PlaneDisaster.NET\OleDba.cs(197,11) : Error CS0030: Cannot
> convert type `PlaneDisaster.OleDba.Cn' to
> `System.Data.OleDb.OleDbConnection'
> C:\src\PlaneDisaster.NET\OleDba.cs(217,11) : Error CS0030: Cannot
> convert type `PlaneDisaster.OleDba.Cn' to
> `System.Data.OleDb.OleDbConnection'
> C:\src\PlaneDisaster.NET\OleDba.cs(49,5) : Error CS0029: Cannot
> implicitly convert type `PlaneDisaster.OleDba._Cn' to
> `System.Data.Common.DbConnection'
> C:\src\PlaneDisaster.NET\OleDba.cs(52,10) : Error CS0029: Cannot
> implicitly convert type `System.Data.Common.DbConnection' to
> `System.Data.OleDb.OleDbConnection'
> C:\Program Files\SharpDevelop\3.0\bin\SharpDevelop.Build.Mono.Gmcs.targets(82,9)
> : Error failed: 7 error(s), 0 warnings
> Build finished successfully.
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