检索外部数据源详细信息

有时，您可能想要检索有关外部数据源的信息。例如，您可能希望查看 SQL 连接数据。此信息可以包括连接到 SQL 服务器所需的任何类型的数据，例如服务器 URL、用户名、基础表名、SQL 查询、查询类型、表的位置等。

Aspose.Cells 提供了一些有用的调用，用于从链接到模板 Excel 文件的公司数据库中检索此类详细信息。

检索外部数据源详细信息

以下示例显示了如何获取数据库连接和其他详细信息。该示例使用一个简单的 Excel 文件，其中包含指向外部数据源 (SQL Server) 的链接。

代码运行时，连接详细信息会打印到控制台。

SQL连接信息

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(RetrievingExternalDataSourcesDetails.class);
// Open the template Excel file
Workbook workbook = new Workbook(dataDir + "connection.xlsx");

// Get the external data connections
ExternalConnectionCollection connections = workbook.getDataConnections();
// Get the count of the collection connection
int connectionCount = connections.getCount();

// Create an external connection object
ExternalConnection connection = null;

// Loop through all the connections in the file
for (int i = 0; i < connectionCount; i++) {
	connection = connections.get(i);
	if (connection instanceof DBConnection) {
		// Instantiate the DB Connection
		DBConnection dbConn = (DBConnection) connection;

		// Print the complete details of the object
		System.out.println("Command: " + dbConn.getCommand());
		System.out.println("Command Type: " + dbConn.getCommandType());
		System.out.println("Description: " + dbConn.getConnectionDescription());
		System.out.println("Id: " + dbConn.getConnectionId());
		System.out.println("Info: " + dbConn.getConnectionInfo());
		System.out.println("Credentials: " + dbConn.getCredentials());
		System.out.println("Name: " + dbConn.getName());
		System.out.println("OdcFile: " + dbConn.getOdcFile());
		System.out.println("Source file: " + dbConn.getSourceFile());
		System.out.println("Type: " + dbConn.getType());

		// Get the parameters collection (if the connection object has)
		ConnectionParameterCollection parameterCollection = dbConn.getParameters();
		// Loop through all the parameters and obtain the details
		int paramCount = parameterCollection.getCount();
		for (int j = 0; j < paramCount; j++) {
			ConnectionParameter param = parameterCollection.get(j);
			System.out.println("Cell reference: " + param.getCellReference());
			System.out.println("Parameter name: " + param.getName());
			System.out.println("Prompt: " + param.getPrompt());
			System.out.println("SQL Type: " + param.getSqlType());
			System.out.println("Param Type: " + param.getType());
			System.out.println("Param Value: " + param.getValue());
		}
	}
}