在F＃中嵌入互操作类型

Question

Can we embed interop type in F# ?

First I dont see the option to do so in the references.

Second, if I embed the type in C#, it tells me to reference the interface and not the concrete class:

//DBEngine is the interface DBEngineClass is the concrete class

//if I dont embed the interop

//Valid
var dbe = new Microsoft.Office.Interop.Access.Dao.DBEngineClass();
//Valid
var dbe = new Microsoft.Office.Interop.Access.Dao.DBEngine();


//if I do embed the interop
//Invalid
var dbe = new Microsoft.Office.Interop.Access.Dao.DBEngineClass();
//Valid
var dbe = new Microsoft.Office.Interop.Access.Dao.DBEngine();

However, F# always wants to have a reference to the concrete class. Is there a way around this ?

Answer 1

Tao Liu talks about some additional work you have to do from F# to discover the correct class to instanciate here . To my knowledge, there is no way to embed the interop types. I would be happy to be proven wrong. :)

Answer 2

Maybe I don't understand your question, but this works fine, referencing v14.0:

open Microsoft.Office.Interop.Access.Dao
let dbe = DBEngineClass() :> DBEngine