CODEWITHSUNDEEP
f#
Edeast
Edeast

Reputation: 75

F# using a class instance's member functions

I'm trying to create a connection to open a database over ODBC. I cannot figure out how to execute an objects member functions. The code:

let DbConnection = new System.Data.Odbc.OdbcConnection()

DbConnection.open

The errors I get are: Missing qualification after '.'

or sometimes: unexpected identifier in implementation file

Does anybody know what is wrong with my syntax?

Upvotes: 1

Views: 310

Answers (1)

Tomas Petricek
Tomas Petricek

Reputation: 243041

I suppose you wanted something like this:

let dbConnection = new System.Data.Odbc.OdbcConnection()
dbConnection.Open()

The problems are:

  • F# is case sensitive so you need Open rather than open (also open is a language keyword, so if you wanted to use it as a name, you'd have to write ``open`` - the double back-tick is a way to refer to reserved names)

  • Open is a function, so if you want to call it you need to give it an argument. You can treat it as a function value too and write, say, let f = dbConnection.Open

  • I also changed your naming to use camelCase for variables, which is the standard F# way

Upvotes: 4

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