Easily Integrate XML Data in Lazarus Pascal IDE

Lazarus Pascal IDE is a powerful, free, open-source development environment for building cross-platform applications. With the CData ODBC Driver for XML, you can seamlessly integrate and query live XML data, bringing real-time insights within your Lazarus Pascal IDE applications to enhance reporting, dashboards, and workflows.

This guide provides a comprehensive walkthrough, from setting up the connection to leveraging live XML in Lazarus Pascal IDE. Whether you're building reports, dashboards, or complex workflows, you'll gain the tools to unlock real-time insights and functionality within your applications.

Overview

Here is an overview of the steps:

1. Configure the DSN for XML data in the CData ODBC Driver for XML with the necessary connection properties.
2. Set up the ODBC connection in Lazarus by configuring the TSQLConnector, TSQLQuery, TDataSource, and TDBGrid components with the required details.
3. Test the connection to XML data by writing sample code on the Main form.
4. Compile and run the application to verify the successful integration and display of live XML data.

Prerequisites

Before starting, ensure you have the following:

• Lazarus IDE (version 3.4 recommended). Download from here.
• CData ODBC Driver for XML. Download and try the latest version from here.

---

Configure the XML DSN Using the CData ODBC Driver

To start, configure the DSN (Data Source Name) for XML data in your system using the CData ODBC Driver for XML. Download and install a 30-day free trial with all the features from here.

Once installed, launch the ODBC Data Source Administrator:

• On Windows: Search for ODBC Data Source Administrator in the Start menu and open the application.
• On Mac: Open Applications, go to Utilities, and select ODBC Manager.
• On Linux: Use the command line to launch ODBC Data Source Administrator or use unixODBC if installed.

👁 ODBC Data Source Administrator Dialogue (Salesforce is shown)

Once launched, double-click on the CData XML data Source and enter the required values to establish a connection:

Connecting to Local or Cloud-Stored (Box, Google Drive, Amazon S3, SharePoint) XML Files

CData Drivers let you work with XML files stored locally and stored in cloud storage services like Box, Amazon S3, Google Drive, or SharePoint, right where they are.

Setting connection properties for local files

Set the URI property to local folder path.

Setting connection properties for files stored in Amazon S3

To connect to XML file(s) within Amazon S3, set the URI property to the URI of the Bucket and Folder where the intended XML files exist. In addition, at least set these properties:

• AWSAccessKey: AWS Access Key (username)
• AWSSecretKey: AWS Secret Key

Setting connection properties for files stored in Box

To connect to XML file(s) within Box, set the URI property to the URI of the folder that includes the intended XML file(s). Use the OAuth authentication method to connect to Box.

Dropbox

To connect to XML file(s) within Dropbox, set the URI proprerty to the URI of the folder that includes the intended XML file(s). Use the OAuth authentication method to connect to Dropbox. Either User Account or Service Account can be used to authenticate.

SharePoint Online (SOAP)

To connect to XML file(s) within SharePoint with SOAP Schema, set the URI proprerty to the URI of the document library that includes the intended XML file. Set User, Password, and StorageBaseURL.

SharePoint Online REST

To connect to XML file(s) within SharePoint with REST Schema, set the URI proprerty to the URI of the document library that includes the intended XML file. StorageBaseURL is optional. If not set, the driver will use the root drive. OAuth is used to authenticate.

Google Drive

To connect to XML file(s) within Google Drive, set the URI property to the URI of the folder that includes the intended XML file(s). Use the OAuth authentication method to connect and set InitiateOAuth to GETANDREFRESH.

The property is the controlling property over how your data is represented into tables and toggles the following basic configurations.

• Document (default): Model a top-level, document view of your XML data. The data provider returns nested elements as aggregates of data.
• FlattenedDocuments: Implicitly join nested documents and their parents into a single table.
• Relational: Return individual, related tables from hierarchical data. The tables contain a primary key and a foreign key that links to the parent document.

See the Modeling XML Data chapter for more information on configuring the relational representation. You will also find the sample data used in the following examples. The data includes entries for people, the cars they own, and various maintenance services performed on those cars.

👁 CData ODBC Driver for Salesforce - DSN Configuration Dialogue

Create a New GUI Project

1. Launch the Lazarus IDE.
2. Navigate to File > New > Application to create a new GUI project with a Main form.

👁 Creating a New GUI Project in Lazarus

Add Required Connection Components to the Form

1. Go to View > Component > Palette and check the Keep open at the bottom-left to keep the Components window persistently open.
2. Search for the following components and add them to the Main form Form1 by clicking on Use at the bottom right.
   1. TSQLConnector
   2. TSQLTransaction
   3. TSQLQuery
   4. TDataSource
   5. TDBGrid

Configure the TSQLConnector Component

The TSQLConnector component in Lazarus Pascal IDE facilitates connections between your application and various databases or database APIs. Here's how to configure it:

1. Select the TSQLConnector component on the Main form.
2. Open the Object Inspector if it's not already open by going to View > Object Inspector
3. In the Object Inspector on the left, set the following properties under the Properties section:

   Property	Value
   Connected	True
   Driver	ODBC
   DatabaseName	Your DSN name (e.g., CData XML Source)
   UserName	Your database username
   Password	Your database password
   HostName	XML URL or localhost for local databases
   LoginPrompt	False
   Transaction	Select your TSQLTransaction component

If your credentials require a security token, follow these steps:

1. Double-click the Main Form in the Lazarus Pascal IDE to open the code editor.
2. Locate the procedure TForm1.FormCreate(Sender: TObject); section.
3. Paste the following code below the begin keyword. Replace 'your_security_token' with your actual security token:

   SQLConnector1.Params.Values ['Password'] := 
    SQLConnector1.Params.Values ['Password'] + 'your_security_token';
   

Configure the TSQLQuery Component

The TSQLQuery component in Lazarus Pascal IDE receives SQL code for queries and retrieves data from a database, simplifying data manipulation. Configure using the following info:

1. Select the TSQLQuery component in the Main form.
2. Set the following properties in the Object Inspector under the Properties section:

   Property	Value
   Active	True
   DataBase	Select the name of your TSQLConnector component
   SQL (Click 3 dots)	Your query (e.g., SELECT * FROM people)
   Transaction	Your TSQLTransaction component

Configure the TDataSource, TDBGrid, TSQLTransaction Components

The TDataSource component in Lazarus Pascal IDE bridges a dataset (e.g., TSQLQuery) with data-aware controls like TDBGrid, allowing data to be displayed and manipulated. The TDBGrid presents the data in a tabular format, while the TSQLTransaction ensures database operations maintain data integrity by executing within a transaction. Here's how to configure all three components:

1. Select the TDataSource component and set its DataSet property to the name of your TSQLQuery component.
2. Select the TDBGrid component and set its DataSource property to your TDataSource component.
3. Select the TSQLTransaction component. Set the following properties:
   1. Active: True
   2. Database: The name of your TSQLConnector component

Add Code to Test the Connection

To successfully test the connection, use the following code:

1. Double-click on the Main Form to open up the Source Editor.
2. Add the following code under the begin keyword and before the end. keyword.

procedure TForm1.FormCreate(Sender: TObject);
begin
 // Code for your Security Token
 SQLConnector1.Params.Values ['Password'] := 
 SQLConnector1.Params.Values ['Password'] + 'your_security_token';
 try
 SQLConnector1.Open;
 ShowMessage('Connection successful!');
 except
 on E: Exception do
 ShowMessage('Error: ' + E.Message);
 end;

 try
 SQLQuery1.Open;
 if SQLQuery1.IsEmpty then
 ShowMessage('No data found.')
 else
 ShowMessage('Data loaded successfully.');
 except
 on E: Exception do
 ShowMessage('Error: ' + E.Message);
 end;
end;

end. 

👁 Source Editor in Lazarus Pascal IDE

Compile and Run the Application

Save your project. Go to Run > Compile, then Run, or use the shortcut F9 to execute your application.

Next Steps: Play with the Data

Now that your data is successfully imported into Lazarus, here are some ideas to explore its full potential:

• Enhance Your TDBGrid: Customize your TDBGrid to enable sorting, editing, or highlighting specific rows.
• Visualize Your Data: Use components like TChart to create graphs and charts for intuitive data representation.
• Filter and Search: Use components like TDBFilter or implement custom filtering logic to allow users to quickly focus on relevant data. Add a TEdit component for user input and link it to your filtering functionality.
• Export Your Data: Utilize TSVExport or TFileStream components to save your data in formats like CSV or Excel for sharing or integration into other systems.
• Perform Calculations: Use TFPCustomDataSet or your dataset's built-in features to calculate totals, averages, or other metrics. Display results in a TLabel or add them to your TDBGrid.
• Create Forms and Reports: Design interactive forms using TForm and TDBEdit for user interaction. For reports, integrate components like RLReport or FastReport to generate and print professional-quality reports.

Take your data-driven application to the next level with these enhancements!

---

Simplify Data Connectivity in Lazarus with CData

Unlock the full potential of live XML data directly within Lazarus Pascal. Streamline your workflows, enhance productivity, and experience seamless integration like never before.

Start your free trial today and transform the way you connect and work with your data!