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DataBind Controls to SAP Fieldglass データ in C++Builder
DataBind to SAP Fieldglass のデータ in C++Builder with standard components and controls.
最終更新日：2023-06-12The CData ODBC Driver for SAP Fieldglass makes it easy to integrate connectivity to live SAP Fieldglass 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 SAP Fieldglass 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 SAP Fieldglass 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.
資格情報の取得
SAP Fieldglass の担当者に問い合わせ、OAuthClientId、OAuthClientSecret、EnvironmentURL を入手してください。SAP Fieldglass への接続
運用環境への認証を行うには、以下のように指定します。
- APIKey：SAP Fieldglass API キー。これはオプションですが、API キーが必要であることを示すSAP Fieldglass からのエラーが発生した場合は、SAP Fieldglass 管理者に依頼するか、SAP Fieldglass Integration Tools にログインしてCreate API Application をクリックします。
- OAuthClientId：SAP Fieldglass 担当者から取得したOAuth Client ID。
- OAuthClientSecret：SAP Fieldglass 担当者から取得したOAuth Client Secret。
- EnvironmentURL：SAP Fieldglass 担当者から取得したSAP Fieldglass Environment URL。
You can then follow the steps below to use the Data Explorer to create a FireDAC connection to SAP Fieldglass.
- 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 SAP Fieldglass.
Create VCL Applications with Connectivity to SAP Fieldglass データ
Follow the procedure below to start querying SAP Fieldglass 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 SAP Fieldglass.
- 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, Category FROM AuditTrails WHERE Company = 'CData'- 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 SAP Fieldglass with FireDAC Components
You can use the TFDConnection and TFQuery components to execute queries to SAP Fieldglass のデータ. This section provides sapfieldglassspecific examples of executing queries with the TFQuery component.
Connect to SAP Fieldglass 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 SAP Fieldglass ODBC Source";
FDConnection1->Connected = true;
To connect the TFDQuery component to SAP Fieldglass 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 AuditTrails where company = :Company";
FDQuery1->ParamByName("company")->AsString = "CData";
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 AuditTrails where company = :Company";
FDQuery1.ParamByName("company")->AsString = "CData";
FDQuery1->Open();
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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