Rapidly Develop FTP-Driven Apps with Active Query Builder

Write standard .NET to expose FTP data through an SQL interface: Active Query Builder helps developers write SQL interfaces; the CData ODBC Driver for FTP enables standards-based access to FTP. This integration uses the Microsoft ADO.NET Provider for ODBC as a bridge between the ODBC Driver and the Active Query Builder objects to build a visual SQL composer.

Connect to FTP as an ODBC Data Source

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.

To connect to FTP or SFTP servers, specify at least RemoteHost and FileProtocol. Specify the port with RemotePort.

Set User and Password to perform Basic authentication. Set SSHAuthMode to use SSH authentication. See the Getting Started section of the data provider help documentation for more information on authenticating via SSH.

Set SSLMode and SSLServerCert to secure connections with SSL.

The data provider lists the tables based on the available folders in your FTP server. Set the following connection properties to control the relational view of the file system:

• RemotePath: Set this to the current working directory.
• TableDepth: Set this to control the depth of folders to list as views.
• FileRetrievalDepth: Set this to retrieve and list files recursively from the root table.

Stored Procedures are available to download files, upload files, and send protocol commands. See the Data Model chapter of the FTP data provider documentation for more information.

Use SQL to Interact with FTP

Follow the steps below to create a WinForms visual query builder.

1. Open Active Query Builder for .NET WinForms. 👁 Opening Active Query Builder.
   
2. In the new Windows Forms project go to the "File" menu and click "Connect..."
3. Under Database Connections, click "Add..." 👁 Adding a new Connection.
   
4. Set your desired Connection Name (e.g. CData FTP), set Connection Type to "ODBC" and locate your previously configured DSN in the "User/System" DSN dropdown. 👁 Selecting a previously configured DSN (Amazon Athena is shown).
   
5. Click "OK" to save the new connection.
6. Back in the Database Connection wizard, select the newly created connection and click "OK." 👁 A newly added Connection (Amazon Athena is shown).
   
7. Click "File" > "New Query" to create a QueryBuilder

You can now build queries visually: Double-click a table in the Columns Pane Area and an entity/relationship diagram is displayed in the Query Building Area. Columns that you select in the diagram are added to the query.