Events and Callbacks

This feature exposes events to notify your application of system information updates and antivirus status changes.

Overview

The Events feature of the SiticoneSystemInfo control allows your application to react dynamically to changes in system information. It includes events such as DeviceInfoUpdated, which signals when a full data refresh is complete, and AntivirusStatusChanged, which notifies subscribers of any changes in antivirus protection status. These events help you implement real-time UI updates and logging mechanisms in your WinForms applications.

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Key Points

Aspect	Details
Exposed Events	DeviceInfoUpdated, AntivirusStatusChanged
Purpose	Notifies the application when system data is refreshed or when antivirus protection status changes
Integration	Allows dynamic UI updates and real-time logging or alerts based on the latest system information

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Best Practices

Practice	Description
Subscribe Early	Subscribe to events during initialization to ensure your application receives notifications as soon as the control updates.
Update UI on Main Thread	Ensure that event handlers update UI components on the main thread to prevent cross-thread operation exceptions.
Log Event Data	Consider logging event details to aid in troubleshooting and performance monitoring.
Unsubscribe When Not Needed	Remove event handlers when they are no longer required to prevent memory leaks or unexpected behavior.

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Common Pitfalls

Pitfall	Description	Recommendation
Missing UI Thread Updates	Updating UI components directly from an event handler that runs on a background thread may cause cross-thread exceptions.	Use Invoke or BeginInvoke to marshal updates to the UI thread.
Failing to Subscribe	Not subscribing to the events can result in missing critical updates, leaving the UI outdated.	Ensure that you subscribe to DeviceInfoUpdated and AntivirusStatusChanged during initialization.
Not Unsubscribing	Leaving event handlers attached when the form is disposed can lead to memory leaks or unintended behavior.	Unsubscribe from events in the form's Dispose method or when the control is no longer needed.
Overcomplicating Event Logic	Implementing heavy processing inside event handlers may degrade UI responsiveness.	Offload intensive processing to background tasks and keep event handlers lightweight.

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Usage Scenarios

Scenario	Description
Real-Time Dashboard Updates	Update a monitoring dashboard automatically when system data is refreshed via the DeviceInfoUpdated event.
Antivirus Alert System	Trigger an alert or update a status indicator when the AntivirusStatusChanged event signals a change in protection status.
Diagnostic Logging	Log details of system refresh events for audit trails or troubleshooting purposes.
Dynamic UI Refresh	Refresh UI components dynamically upon receiving event notifications to reflect the most current system configuration data.

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Real Life Usage Scenarios

Scenario	Description
IT Monitoring Dashboard	Integrate events into a real-time dashboard that alerts IT administrators when system information or antivirus status changes.
Support Tools	Build a diagnostic tool that logs every time the system data is refreshed, aiding support staff in identifying patterns during troubleshooting.
Compliance Auditing	Automatically update compliance reports whenever the system data is updated, ensuring that audits always reflect the latest state.

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Troubleshooting Tips

Tip	Description	Recommendation
Ensure UI Thread Invocation	Event handlers may execute on a non-UI thread, causing exceptions when updating UI controls.	Use Invoke or BeginInvoke in your event handlers to ensure UI updates are performed on the main thread.
Verify Event Subscriptions	If expected updates are not occurring, the events may not be properly subscribed.	Double-check that your event subscriptions are set up during initialization and remain active throughout the control’s lifecycle.
Log Event Data	Undiagnosed issues may arise if events are not firing as expected.	Implement logging in your event handlers to verify that events are being raised and to capture event data for debugging.
Unsubscribe When Appropriate	Memory leaks or unexpected behavior can occur if event handlers remain subscribed after the control is disposed.	Ensure proper unsubscription in the Dispose method or when the associated UI component is no longer in use.

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Code Examples & Integration Demos

Example 1: Subscribing to DeviceInfoUpdated Event

Description: Subscribe to the DeviceInfoUpdated event to update UI components when system information is refreshed.

// In your form initialization
public MainForm()
{
    InitializeComponent();
    systemInfoControl.DeviceInfoUpdated += SystemInfoControl_DeviceInfoUpdated;
}

private void SystemInfoControl_DeviceInfoUpdated(object sender, DeviceInfoUpdateEventArgs e)
{
    // Marshal the UI update to the main thread
    Invoke(new Action(() =>
    {
        // Update UI elements, for example, refresh a data grid view
        dataGridViewSystemInfo.DataSource = systemInfoControl.Services.ToList();
    }));
}

Example 2: Handling AntivirusStatusChanged Event

Description: Subscribe to the AntivirusStatusChanged event to update an antivirus status label on the UI.

// In your form initialization
public MainForm()
{
    InitializeComponent();
    systemInfoControl.AntivirusStatusChanged += SystemInfoControl_AntivirusStatusChanged;
}

private void SystemInfoControl_AntivirusStatusChanged(object sender, AntivirusStatusEventArgs e)
{
    // Update UI on the main thread
    Invoke(new Action(() =>
    {
        var status = e.Status;
        lblAntivirusStatus.Text = status.IsProtectionEnabled 
            ? (status.IsUpToDate ? "Antivirus Active & Up-to Date" : "Antivirus Active but Outdated") 
            : "No Antivirus Detected";
    }));
}

Example 3: Unsubscribing from Events

Description: Unsubscribe from events when the form is closing to prevent memory leaks.

protected override void OnFormClosing(FormClosingEventArgs e)
{
    // Unsubscribe from events to prevent memory leaks
    systemInfoControl.DeviceInfoUpdated -= SystemInfoControl_DeviceInfoUpdated;
    systemInfoControl.AntivirusStatusChanged -= SystemInfoControl_AntivirusStatusChanged;
    base.OnFormClosing(e);
}

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Review

Aspect	Review Comments
Integration Simplicity	Events are straightforward to subscribe to and provide real-time notifications, simplifying dynamic UI updates and logging mechanisms.
Robustness	The event-driven approach enhances application responsiveness, but proper error handling and thread marshaling are essential to avoid UI-related issues.
UI Flexibility	Events facilitate a wide range of integrations, from updating dashboards to triggering alerts, making them highly adaptable to various application needs.
Documentation Clarity	Clear examples and best practices ensure developers can quickly understand how to implement event handlers without exposing internal logic.

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Summary

The Events feature in the SiticoneSystemInfo control enables your application to react dynamically to system information updates and antivirus status changes. By subscribing to events such as DeviceInfoUpdated and AntivirusStatusChanged, you can implement real-time UI updates, logging, and alerting. Follow the provided best practices and code examples to ensure that your event handlers operate on the UI thread and that you manage subscriptions appropriately. Happy coding!