


How Can C# and WMI Automate Application Startup and Shutdown Based on USB Drive Insertion and Removal?
Jan 14, 2025 am 08:29 AMAutomating Application Behavior with USB Drive Insertion/Removal: A C# and WMI Solution
Need to automatically start and stop an application when a USB drive is inserted or removed? This guide demonstrates how to achieve this using C# and Windows Management Instrumentation (WMI).
Detecting USB Drive Changes
Several methods exist for detecting USB drive events in C#, including using WndProc
to intercept Windows messages. However, WMI offers a simpler and more robust approach, especially within a service context.
WMI Implementation: A Practical Example
The following code snippet illustrates how to use WMI to monitor USB drive insertion events:
using System.Management; // Create a WMI event watcher ManagementEventWatcher watcher = new ManagementEventWatcher(); // Define the WQL query to monitor volume change events (EventType 2 indicates insertion) WqlEventQuery query = new WqlEventQuery("SELECT * FROM Win32_VolumeChangeEvent WHERE EventType = 2"); // Assign the event handler watcher.EventArrived += watcher_EventArrived; // Set the query for the watcher watcher.Query = query; // Start the watcher watcher.Start(); // Wait for the next event (this can be adapted for continuous monitoring) watcher.WaitForNextEvent(); private void watcher_EventArrived(object sender, EventArrivedEventArgs e) { // Handle USB drive insertion event here }
The watcher_EventArrived
method will be triggered when a USB drive is inserted. Similar logic, modifying the EventType
in the query (EventType 3 represents removal), can be used to detect USB drive removal.
Summary
This combination of C# and WMI provides a reliable and efficient method for creating a Windows service that automatically responds to USB drive insertion and removal. This capability is highly valuable for various application scenarios requiring dynamic behavior based on USB drive presence.
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