FireDAC Components for Open Exchange Rates

Build 21.0.7930

Establishing a Connection

You can create and manage connections with the Data Explorer and the FireDAC Connection Editor wizards. See Connection Definitions for more information on creating connections from code and creating persistent, private, or temporary connections.

Connecting to Open Exchange Rates

The Open Exchange Rates API supports basic authentication with an App Id. After you register an Open Exchange Rates account, your App Id is displayed in your account dashboard. Set this to the AppId connection property.

Using the FireDAC Connection Editor

Complete the following steps to use the FireDAC Connection Editor to assign a Open Exchange Rates connection to a TFDConnection object:

  1. Open a project and drop a TFDPhysCDataOpenExchangeRatesDriverLink from the Tool Palette onto the Form Designer.
  2. Drop a TFDConnection object onto the Form Designer.
  3. Double-click the TFDConnection and select CDataOpenExchangeRates in the Driver Id menu.
  4. Define the necessary connection properties.
  5. To execute ad-hoc SQL statements based on this connection, enter SQL commands on the SQL Script tab.
  6. In the Form Designer, select the TFDConnection object and set the Connected property to true.

Using the Data Explorer

Complete the following steps to use the Data Explorer to define persistent connections that can be shared across applications and projects:

  1. Click View > Tool Windows > Data Explorer in RAD Studio and expand the FireDAC node.
  2. Right-click the CData Open Exchange Rates Data Source node and click Add New Connection.
  3. Enter a name for the connection. The FireDAC Connection Editor opens.

Working with Persistent Connections

The connections you define in the Data Explorer can be assigned to a TFDConnection object by specifying the connection name in the TFDConnection object's ConnectionDefName property.

Browsing Data and Metadata

The Data Explorer also provides options for browsing Open Exchange Rates objects at design time:

  • Expand the CData Open Exchange Rates Data Source node in the Data Explorer to view the defined connections.
  • Expand a connection node to find the database objects available for a connection.
  • Drill down to a database object to find metadata such as primary keys.
  • To display data, double-click a table or view or right-click and click View.

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Build 21.0.7930