DataBind Controls to Airtable データ in C++Builder

The CData ODBC Driver for Airtable makes it easy to integrate connectivity to live Airtable のデータ with standard data access components in C++Builder. This article shows how to create a simple visual component library (VCL) application in C++Builder that connects to Airtable のデータ, executes queries, and displays the results in a grid. An additional section shows how to use FireDAC components to execute commands from code.

Create a Connection to Airtable データ

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.

Airtable への接続には、APIKey、BaseId、TableNames のプロパティが必須です。ViewNames は任意項目でテーブルのビューを指定することができます。

• APIKey : アカウントのAPI Key。取得には、アカウントにログインして、API セクションで「Generate API Key」をクリックします。
• BaseId : ベースのId。取得には、APIKey と同じ場所で、「Airtable API」をクリックするか、https://airtable.com/api に進み、ベースを選択します。"The ID of this base is appxxN2ftedc0nEG7." というメッセージがIntroduction セッションで表示されます。
• TableNames : 選択されたベースのテーブル名のカンマ区切りのリスト。UI で見られるテーブル名と同じです。
• ViewNames : table.view 形式のビューのカンマ区切りのリスト。UI でみられるビュー名と同じです。

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

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 Airtable.

Create VCL Applications with Connectivity to Airtable データ

Follow the procedure below to start querying Airtable のデータ 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 Airtable.
   • 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 Id, Column1 FROM SampleTable_1 WHERE Column1 = 'Value1'
   • 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.

Execute Commands to Airtable with FireDAC Components

You can use the TFDConnection and TFQuery components to execute queries to Airtable のデータ. This section provides airtablespecific examples of executing queries with the TFQuery component.

Connect to Airtable データ

To connect to the data source, set the Connected property of the TFDConnection component to true. You can set the same properties from code:

To connect the TFDQuery component to Airtable のデータ, set the Connection property of the component. When a TFDQuery component is added at design time, its Connection property is automatically set to point to a TFDConnection on the form, as in the application above.

Create Parameterized Queries

To create a parameterized query, use the following syntax below:

The example above binds a string-type input parameter by name and then opens the dataset that results.

Prepare the Statement

Preparing statements is costly in system resources and time. The connection must be active and open while a statement is prepared. By default, FireDAC prepares the query to avoid recompiling the same query over and over. To disable statement preparation, set ResourceOptions.DirectExecute to True; for example, when you need to execute a query only once.

Execute a Query

To execute a query that returns a result set, such as a select query, use the Open method. The Open method executes the query, returns the result set, and opens it. The Open method will return an error if the query does not produce a result set.

Related Articles

Below you can find other articles for using the CData ODBC Driver with RAD Studio, Delphi, and C++ Builder.

• DataBind Controls to Airtable データ in Delphi
• Viewing Airtable データ in RAD Studio Data Explorer
• Build a Simple VCL Application for Airtable データ