Automate FreshBooks Integration Tasks from PowerShell

The CData API Driver for ADO.NET is a standard ADO.NET Provider that make it easy to accomplish data cleansing, normalization, backup, and other integration tasks by enabling real-time access to FreshBooks.

ADO.NET Provider

The ADO.NET Provider provides a SQL interface for FreshBooks; this tutorial shows how to use the Provider to retrieve FreshBooks data.

Once you have acquired the necessary connection properties, accessing FreshBooks data in PowerShell can be enabled in three steps.

Start by setting the Profile connection property to the location of the FreshBooks Profile on disk (e.g. C:\profiles\FreshBooks.apip). Next, set the ProfileSettings connection property to the connection string for FreshBooks (see below).

FreshBooks API Profile Settings

Register an OAuth application in your FreshBooks Developer Dashboard to obtain a Client ID and Client Secret, and configure the redirect URI to match your application's callback URL.

1. Load the provider's assembly:

   [Reflection.Assembly]::LoadFile("C:\Program Files\CData\CData API Driver for ADO.NET\lib\System.Data.CData.API.dll")
    

2. Connect to FreshBooks:

    
   $conn= New-Object System.Data.CData.API.APIConnection("Profile=C:\profiles\FreshBooks.apip;Authscheme=OAuth;OAuthClientId=your_client_id;OAuthClientSecret=your_client_secret;CallbackUrl=your_callback_url;InitiateOAuth=GETANDREFRESH;")
   $conn.Open()
   

3. Instantiate the APIDataAdapter, execute an SQL query, and output the results:

   $sql="SELECT Id, InvoiceNumber from Invoices"
   
   $da= New-Object System.Data.CData.API.APIDataAdapter($sql, $conn)
   $dt= New-Object System.Data.DataTable
   $da.Fill($dt)
   
   $dt.Rows | foreach {
   	Write-Host $_.id $_.invoicenumber
   }