Build a Simple VCL Application for PayPal データ

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

Create a Connection to PayPal 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.

CData 製品は、2つのPayPal API のテーブルを表示します。API は異なる認証方法を使用します。

• REST API はOAuth 標準を使用します。REST API を認証するには、OAuthClientId、OAuthClientSecret、CallbackURL プロパティを設定する必要があります。
• Classic API にはSignature API 認証情報が必要です。Classic API を認証するにはUsername、Password、およびSignature プロパティを設定する必要があります。

必要なAPI 資格情報の取得については、ヘルプドキュメントの「はじめに」を参照してください。

使用するAPI を選択するには、Schema プロパティをREST またはSOAP に設定します。デフォルトでは、SOAP スキーマが使われます。

テスト目的では、UseSandbox をtrue に設定してSandbox 資格情報を使用できます。

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

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 PayPal.

Create VCL Applications with Connectivity to PayPal データ

Follow the procedure below to start executing queries to PayPal 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 PayPal データ.
   • 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 Date, GrossAmount FROM Transactions
   • 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.

Related Articles

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

• DataBind Controls to PayPal データ in C++Builder
• DataBind Controls to PayPal データ in Delphi
• Viewing PayPal データ in RAD Studio Data Explorer