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DataBind Controls to Zendesk データ in C++Builder
DataBind to Zendesk のデータ in C++Builder with standard components and controls.
最終更新日：2023-06-12The CData ODBC Driver for Zendesk makes it easy to integrate connectivity to live Zendesk 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 Zendesk 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 Zendesk 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.
Zendesk 接続プロパティの取得・設定方法
Zendesk に接続するには、https://{subdomain}.zendesk.com の形式でURL（Zendesk Support URL）を設定します。接続後、次のセクションの説明に従ってユーザー認証を行います。
また、TicketMetrics テーブルのアーカイブデータを扱うユーザーは、UseIncrementalAPI プロパティをTrue に設定する必要があります。
Zendesk への認証
Zendesk は、Zendesk インスタンスの設定に応じて、3種類の認証をサポートします。API トークン認証、OAuth 認証、Basic 認証（レガシー）です。
API トークン認証
API トークン認証を使用する場合は、E メールアドレスとApiToken を指定します。 AuthScheme をAPIToken に、User をE メールアドレスに設定し、Zendesk Support の管理画面で以下の設定を行います。
- Token アクセスを有効にします。
- Admin -> Channels-> API で、API トークンを管理します。一度にアクティブにできるトークンは1つだけです。トークンを削除すると、そのトークンは永久に無効化されます。
その他の認証方法についてはヘルプドキュメントを参照してください。
You can then follow the steps below to use the Data Explorer to create a FireDAC connection to Zendesk.
- 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 Zendesk.
Create VCL Applications with Connectivity to Zendesk データ
Follow the procedure below to start querying Zendesk のデータ from a simple VCL application that displays the results of a query in a grid.
-
Drop a TFDConnection component onto the form and set the following properties:
- ConnectionDefName: Select the FireDAC connection to Zendesk.
- Connected: Select True from the menu and, in the dialog that appears, enter your credentials.
-
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, Subject FROM Tickets- 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.
-
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.
Execute Commands to Zendesk with FireDAC Components
You can use the TFDConnection and TFQuery components to execute queries to Zendesk のデータ. This section provides zendeskspecific examples of executing queries with the TFQuery component.
Connect to Zendesk 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:
FDConnection1->ConnectionDefName = "CData Zendesk ODBC Source";
FDConnection1->Connected = true;
To connect the TFDQuery component to Zendesk 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:
FDQuery1->SQL->Text = "select * from Tickets where industry = :Industry";
FDQuery1->ParamByName("industry")->AsString = "Floppy Disks";
query->Open();
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.
FDQuery1->SQL->Text := "select * from Tickets where industry = :Industry";
FDQuery1.ParamByName("industry")->AsString = "Floppy Disks";
FDQuery1->Open();
To execute a query that does not return a result set, use the ExecSQL method. The ExecSQL method will return an error if the query returns a result set. To retrieve the count of affected rows use the TFD.RowsAffected property.
FDQ.SQL.Text := "delete from Tickets where Id = :Id";
FDQuery1->Params->Items[0]->AsString = "x12345";
FDQuery1->ExecSQL();
AnsiString i = FDQuery1->RowsAffected;
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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