Stop background worker

Hi @Jordan Halgunseth , Welcome to Microsoft Q&A,

To stop the BackgroundWorker when the ESC key is pressed, you can use the following method:

using System;

using System.ComponentModel;

using System.Windows.Forms;

namespaceBackgroundWorkerExample

{

     public partial class Form1 : Form

     {

         private BackgroundWorker backgroundWorker1;

         public Form1()

         {

             InitializeComponent();

             //Initialize BackgroundWorker

             backgroundWorker1 = new BackgroundWorker();

             backgroundWorker1.DoWork += backgroundWorker1_DoWork;

             backgroundWorker1.WorkerSupportsCancellation = true;

             //Listen to key events

             this.KeyPreview = true;

             this.KeyPress += new KeyPressEventHandler(Form1_KeyPress);

         }

         // Stop BackgroundWorker when ESC key is pressed

         private void Form1_KeyPress(object sender, KeyPressEventArgs e)

         {

             if (e.KeyChar == (char)Keys.Escape)

             {

                 if (backgroundWorker1.IsBusy)

                 {

                     backgroundWorker1.CancelAsync();

                 }

             }

         }

         //Background processing logic

         private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)

         {

             BackgroundWorker worker = sender as BackgroundWorker;

             //Execute your file reading logic here

             for (int i = 0; i < 100; i++)

             {

                 // Check if cancellation of background operation has been requested

                 if (worker.CancellationPending)

                 {

                     e.Cancel = true;

                     return;

                 }

                 // Simulate file reading operation

                 System.Threading.Thread.Sleep(100);

             }

         }

     }

}

In this example, when the ESC key is pressed, it checks to see if the BackgroundWorker is running. If so, call the CancelAsync() method to request cancellation of the asynchronous operation. In the DoWork event, the CancellationPending property needs to be checked periodically to see if cancellation has been requested.