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Build a Simple VCL Application for Google Drive データ
How to build a simple VCL Application to view Google Drive データ in RAD Studio using the CData ODBC Driver for Google Drive.
最終更新日：2023-06-12Embarcadero RAD Studio provides a development environment for Delphi and C++Builder applications. With the CData ODBC Driver for Google Drive, you gain access to live Google Drive データ within RAD Studio, abstracting the data into tables, views, and stored procedures that can be used to retrieve and update Google Drive データ. This article will walk through connecting to Google Drive and creating a simple VCL application with the Form Designer.
Create a Connection to Google Drive 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.
Google Drive はOAuth 認証標準を利用しています。各ユーザーやドメイン内のユーザーの代わりに、CData 製品がGoogle API にアクセスすることを許可できます。 接続すると、CData 製品はデフォルトブラウザでOAuth エンドポイントを開きます。ログインして、アプリケーションにアクセス許可を与えます。CData 製品がOAuth プロセスを完了します。
詳細はヘルプドキュメントを参照してください。
尚、CData 製品はGoogle Drive のファイルの一覧表示やユーザー管理情報の取得用です。Google Drive に保管されているExcel、CSV、JSON などのファイル内のデータを読み込みたい場合には、Excel Driver、CSV Driver、JSON Driver をご利用ください。
You can then follow the steps below to use the Data Explorer to create a FireDAC connection to Google Drive データ.
- In a new VCL Forms application, expand the FireDAC node in the Data Explorer.
- Right-click the ODBC Data Source node in the Data Explorer.
- Click Add New Connection.
- Enter a name for the connection.
- In the FireDAC Connection Editor that appears, set the DataSource property to the name of the ODBC DSN for Google Drive.
Create VCL Applications with Connectivity to Google Drive データ
Follow the procedure below to start executing queries to Google Drive データ from a simple VCL application that displays the results of a query in a grid.
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Drop a TFDConnection component onto the form and set the following properties:
- ConnectionDefName: Select the FireDAC connection to Google Drive データ.
- Connected: Select True from the menu and, in the dialog that appears, enter your credentials.
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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 Name, Size FROM Files- Active: Set this property to true.
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.
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Drop a TDBGrid control onto the form and set the following property:
- DataSource: Select the name of the TDataSource.
- 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.
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