Build a Simple VCL Application for QuickBooks Online Data

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The QuickBooks Online ODBC Driver is a powerful tool that allows you to connect with live data from QuickBooks Online, directly from any applications that support ODBC connectivity.

Access QuickBooks Online data like you would a database - read, write, and update Customers, Transactions, Invoices, Sales Receipts, etc. through a standard ODBC Driver interface.



How to build a simple VCL Application to view QuickBooks Online data in RAD Studio using the CData ODBC Driver for QuickBooks Online.

Embarcadero RAD Studio provides a development environment for Delphi and C++Builder applications. With the CData ODBC Driver for QuickBooks Online, you gain access to live QuickBooks Online data within RAD Studio, abstracting the data into tables, views, and stored procedures that can be used to retrieve and update QuickBooks Online data. This article will walk through connecting to QuickBooks Online and creating a simple VCL application with the Form Designer.

Create a Connection to QuickBooks Online Data

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

QuickBooks Online uses the OAuth authentication standard. OAuth requires the authenticating user to log in through the browser. To authenticate using OAuth, you can use the embedded OAuthClientId, OAuthClientSecret, and CallbackURL or you can obtain your own by registering an app with Intuit. Additionally, if you want to connect to sandbox data, set UseSandbox to true.

See the Getting Started chapter of the help documentation for a guide to using OAuth.

You can then follow the steps below to use the Data Explorer to create a FireDAC connection to QuickBooks Online data.

  1. In a new VCL Forms application, expand the FireDAC node in the Data Explorer.
  2. Right-click the ODBC Data Source node in the Data Explorer.
  3. Click Add New Connection.
  4. Enter a name for the connection.
  5. In the FireDAC Connection Editor that appears, set the DataSource property to the name of the ODBC DSN for QuickBooks Online.

Create VCL Applications with Connectivity to QuickBooks Online Data

Follow the procedure below to start executing queries to QuickBooks Online data from a simple VCL application that displays the results of a query in a grid.

  1. Drop a TFDConnection component onto the form and set the following properties:

    • ConnectionDefName: Select the FireDAC connection to QuickBooks Online data.
    • Connected: Select True from the menu and, in the dialog that appears, enter your credentials.
  2. Drop a TFDQuery component onto the form and set the properties below:

    • Connection: Set this property to the TFDConnection component, if this component is not already specified.
    • SQL: Click the button in the SQL property and enter a query. For example:

      SELECT DisplayName, Balance FROM Customers
    • Active: Set this property to true.
  3. Drop a TDataSource component onto the form and set the following property:

    • DataSet: In the menu for this property, select the name of the TFDQuery component.
  4. Drop a TDBGrid control onto the form and set the following property:

    • DataSource: Select the name of the TDataSource.
  5. Drop a TFDGUIxWaitCursor onto the form — this is required to avoid a run-time error.

You now have an executable application that displays the results of the SQL Query set in the TFDQuery object.