如何在C#中使用WinForm应用程序中的进度条

progressBar1.Minimum = 0; // 进度条的最小值
progressBar1.Maximum = 100; // 进度条的最大值
progressBar1.Value = 0; // 进度条的初始值

progressBar1.Value = 50; // 更新进度条的值为50

private BackgroundWorker worker;

public Form1()
{
    InitializeComponent();

    worker = new BackgroundWorker();
    worker.WorkerReportsProgress = true;
    worker.DoWork += Worker_DoWork;
    worker.ProgressChanged += Worker_ProgressChanged;
    worker.RunWorkerCompleted += Worker_RunWorkerCompleted;
}

private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
    // 执行耗时操作，根据进度更新进度条的值
    for (int i = 0; i <= 100; i++)
    {
        worker.ReportProgress(i);
        Thread.Sleep(100); // 模拟耗时操作
    }
}

private void Worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progressBar1.Value = e.ProgressPercentage;
}

private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    // 耗时操作完成后的处理
    MessageBox.Show("操作完成！");
}

private void button1_Click(object sender, EventArgs e)
{
    // 启动后台任务
    worker.RunWorkerAsync();
}