Connecting F# to

The ODBC Driver enables you to work with data from F#. Note that the procedure outlined in this blog is the same for any ODBC driver, so it's still relevant even if you are using F# with another ODBC driver.

The ODBC Driver is available to download from the Easysoft web site:

  1. Download the Windows ODBC Driver. (Registration required.)
  2. Install and license the ODBC Driver on the machine where is installed.

    For installation instructions, see the ODBC Driver documentation.

Before you can use the ODBC Driver to connect F# to, you need to configure an ODBC data source. An ODBC data source stores the connection details for the target database (e.g. and the ODBC driver that is required to connect to it (e.g. the ODBC driver).

To create a ODBC Driver data source:

  1. In the 32-bit version of ODBC Administrator, choose the System DSN tab, and then choose Add.

    To run the 32-bit version of ODBC Administrator, in the Windows Run dialog box, enter:

  2. In the Create New Data Source dialog box, choose Easysoft ODBC-Salesforce Driver, and then choose Finish.
  3. Complete the Easysoft ODBC-Salesforce Driver DSN Setup dialog box:
    Setting Value
    User Name The name of your user. For example,
    Password The password for your user.
    Token The security token for your user, if required.

    To find out whether you need to supply a security token, choose the Test button. If the connection attempt fails with an error which contains LOGIN_MUST_USE_SECURITY_TOKEN, you need to supply one. emails the security token to the email address associated with your user account. If you have not received a security token, you can regenerate it. will then email the new security token to you. To regenerate your security token, log in to and then choose Setup from the user menu. Search for "security token" in the Quick Find box. Click Reset Security Token in the Reset Security Token page. When you receive the token in your email client, copy it and then paste it into the Token field.

  4. Use the Test button to verify that you can successfully connect to
  1. In Visual Studio, create a new F# console application.
  2. Right-click the Solution Explorer pane. From the shortcut menu, choose Add > Reference.

    The Reference Manager dialog box is displayed.

  3. Choose System.Data from the list, and then choose OK.
  4. In the ConsoleApplication1 pane, add this code:
    open System
    open System.Data.Odbc
    let connectToDb() =
        // Salesforce ODBC Data Source
        let connectionString = "DSN=Salesforce"
        new OdbcConnection(connectionString)
    let getODBCData()=
        let connection = connectToDb()
        let tableName = "Account"
        let sqlQuery = "SELECT * FROM " + tableName
        let cmd = new OdbcCommand(sqlQuery,connection)
        let result = cmd.ExecuteReader()
        // Retrieve the first column from the Account table
        if (result.HasRows) then while result.Read() do Console.WriteLine(result.GetValue(0))
        else Console.WriteLine("No rows found.")
    let main argv =
        let salesforceData = getODBCData()
  5. From the Build menu, choose Build Solution.
  6. Choose the Start button.