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DataBind Controls to Veeva データ in C++Builder
DataBind to Veeva のデータ in C++Builder with standard components and controls.
最終更新日：2023-06-12The CData ODBC Driver for Veeva makes it easy to integrate connectivity to live Veeva 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 Veeva 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 Veeva 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.
Veeva Vault アカウントに接続するには、まず、アカウントにログインした後にアドレスバーに表示されるホストにUrl 接続プロパティを設定する必要があります。
例：https://myvault.veevavault.com
Veeva Vault への認証
本製品は、次の認証メソッドをサポートしています。
- Veeva Vault ユーザー資格情報
- Azure AD 認証プロバイダーのOpenID Connect
- Okta SSO
ユーザー資格情報
AuthScheme をBasic に設定し、User とPassword をユーザーログイン資格情報に設定します。
その他の認証方法で認証する場合は、ヘルプドキュメントの「接続の確立」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 Veeva.
- 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 Veeva.
Create VCL Applications with Connectivity to Veeva データ
Follow the procedure below to start querying Veeva 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 Veeva.
- 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 ProductId, ProductName FROM NorthwindProducts WHERE CategoryId = 5- 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 Veeva with FireDAC Components
You can use the TFDConnection and TFQuery components to execute queries to Veeva のデータ. This section provides veevaspecific examples of executing queries with the TFQuery component.
Connect to Veeva 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 Veeva ODBC Source";
FDConnection1->Connected = true;
To connect the TFDQuery component to Veeva 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 NorthwindProducts where categoryid = :CategoryId";
FDQuery1->ParamByName("categoryid")->AsString = "5";
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 NorthwindProducts where categoryid = :CategoryId";
FDQuery1.ParamByName("categoryid")->AsString = "5";
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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