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DataBind Controls to Microsoft Dataverse データ in C++Builder
DataBind to Microsoft Dataverse のデータ in C++Builder with standard components and controls.
最終更新日：2023-06-12The CData ODBC Driver for Microsoft Dataverse makes it easy to integrate connectivity to live Microsoft Dataverse 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 Microsoft Dataverse 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 Microsoft Dataverse 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.
ユーザー資格情報の接続プロパティを設定せずに接続できます。接続に最小限必要な接続プロパティは、以下のとおりです。
- InitiateOAuth: GETANDREFRESH に設定します。
- OrganizationUrl: 接続先の組織のURL、例えばhttps://organization.crm.dynamics.com などに設定。
- Tenant (optional): デフォルトと異なるテナントに認証したい場合は、これを設定します。これは、デフォルトのテナントに所属していない組織と連携するために必要です。
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、CData 製品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。
You can then follow the steps below to use the Data Explorer to create a FireDAC connection to Microsoft Dataverse.
- 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 Microsoft Dataverse.
Create VCL Applications with Connectivity to Microsoft Dataverse データ
Follow the procedure below to start querying Microsoft Dataverse 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 Microsoft Dataverse.
- 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 AccountId, Name FROM Accounts WHERE Name = 'MyAccount'- 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 Microsoft Dataverse with FireDAC Components
You can use the TFDConnection and TFQuery components to execute queries to Microsoft Dataverse のデータ. This section provides dataversespecific examples of executing queries with the TFQuery component.
Connect to Microsoft Dataverse 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 Microsoft Dataverse ODBC Source";
FDConnection1->Connected = true;
To connect the TFDQuery component to Microsoft Dataverse 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 Accounts where name = :Name";
FDQuery1->ParamByName("name")->AsString = "MyAccount";
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 Accounts where name = :Name";
FDQuery1.ParamByName("name")->AsString = "MyAccount";
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 Accounts 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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