Devart Forums

Posted: **Mon 28 Aug 2017 08:36**

I'm am working with the new release of dotnet Core 2.0, and need dotConnect for Oracle (9.4.326) to provide an connection to my database.

I have the following code :

Code: Select all

var OracleConnectionStringBuilder oraCsb =
                new OracleConnectionStringBuilder
                {
                    ConnectionString = ConnectionString,
                    Direct = true,
                    InitializationCommand =
                        "ALTER SESSION SET NLS_TERRITORY='DENMARK' NLS_LANGUAGE='DANISH' NLS_DATE_LANGUAGE='DANISH' NLS_CURRENCY='kr.' NLS_DATE_FORMAT='DD-MM-YYYY' NLS_ISO_CURRENCY='DENMARK' NLS_NUMERIC_CHARACTERS=',.' NLS_DUAL_CURRENCY='kr.' NLS_NCHAR_CONV_EXCP='True' NLS_TIMESTAMP_FORMAT='DD-MM-YYYY HH24:MI:SS' NLS_TIMESTAMP_TZ_FORMAT='DD-MM-YYYY HH24:MI:SS TZH:TZM' TIME_ZONE='Europe/Copenhagen'" };

Returned connectionstring is...:

User Id=xxx;Password=xxx;Server=10.1.1.101;Direct=True;Sid=orcl;Persist Security Info=True;Initialization Command="ALTER SESSION SET NLS_TERRITORY='DENMARK' NLS_LANGUAGE='DANISH' NLS_DATE_LANGUAGE='DANISH' NLS_CURRENCY='kr.' NLS_DATE_FORMAT='DD-MM-YYYY' NLS_ISO_CURRENCY='DENMARK' NLS_NUMERIC_CHARACTERS=',.' NLS_DUAL_CURRENCY='kr.' NLS_NCHAR_CONV_EXCP='True' NLS_TIMESTAMP_FORMAT='DD-MM-YYYY HH24:MI:SS' NLS_TIMESTAMP_TZ_FORMAT='DD-MM-YYYY HH24:MI:SS TZH:TZM' TIME_ZONE='Europe/Copenhagen'"

That is OK. But when the following is executed

Code: Select all

var InnerOracleConnection = new OracleConnection();
InnerOracleConnection.ConnectionString = oraCsb.ConnectionString;

last line throws an exception:

{System.TypeInitializationException: The type initializer for 'LeanfidsModel.CacheLayer' threw an exception. ---> System.TypeLoadException: Could not load type 'System.Diagnostics.PerformanceCounterType' from assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
at Devart.Common.DbConnectionPoolGroup.a(n A_0)
at Devart.Common.DbConnectionFactory.a(String A_0, n& A_1)
at Devart.Common.DbConnectionBase.set_ConnectionString(String value)
at LeanfidsModel.OracleTrackedConnection..ctor(OracleTrackedConnection baseConnection, Boolean isContext) in C:\Users\klaus\documents\visual studio 2017\Projects\FirstWebapplication\LeanfidsModel\OracleTrackedConnection.cs:line 69
at LeanfidsModel.CachedList`1.LoadCache() in C:\Users\klaus\documents\visual studio 2017\Projects\FirstWebapplication\LeanfidsModel\CachedList.cs:line 68
at LeanfidsModel.CachedList`1..ctor() in C:\Users\klaus\documents\visual studio 2017\Projects\FirstWebapplication\LeanfidsModel\CachedList.cs:line 25
at LeanfidsModel.CacheLayer..cctor() in C:\Users\klaus\documents\visual studio 2017\Projects\FirstWebapplication\LeanfidsModel\CacheLayer.cs:line 12
--- End of inner exception stack trace ---}

What do I do wrong ?

Regards
//Klaus

Posted: **Tue 29 Aug 2017 11:25**

The Performance Counters functionality is not available in .NET Core: https://www.devart.com/dotconnect/oracl ... ility.html.

Referencing .NET Framework assemblies from .NET Standard project will not solve the issue as well because this allows to only use types within the .NET Standard API set. Refer to https://blogs.msdn.microsoft.com/dotnet ... -core-2-0/ > the "Reference .NET Framework libraries from .NET Standard" section.

Devart Forums

dotnet core 2.0 - and devart throws exception

dotnet core 2.0 - and devart throws exception

Re: dotnet core 2.0 - and devart throws exception