.net - Using different ADO.NET providers dynamically with Entity Framework -

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my application can work different databases sql server, mysql, oracle, postgresql or sqlite. knows how load relevant ado.net assembly (its dll file name known) , find dbproviderfactory type in it. factory gives me need work database connection on plain ado.net level.

entering entity framework. used use own o/rm want replace ef 6 code first. own o/rm generated sql , ran dbcommand class. ef seems lot more , require special configuration. can't add assembly references supported database client provider , require deploying files. need solution loads assemblies @ runtime dynamically , finds way there. then, depending on database shall used, deploy dlls required that.

for doesn't work yet. error message postgresql:

system.notsupportedexception: unable determine provider name provider factory of type 'npgsql.npgsqlfactory'. make sure ado.net provider installed or registered in application config.

this happens when try add entity dbset. database server connection has been opened , schema installation done. (i don't use ef migrations , don't use connection strings open connection myself when needed.) know haven't added specific configuration app.config file. don't file altogether , avoid using completely.

is there api use register required ef? have type , instance of npgsql provider, example. pass ef method use it?


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