如何使用鼠标按住并释放来检查TrackBar的滑动。

public partial class Form1 : Form
{
    private int updateCount;
    private System.Threading.Timer timer;

    public Form1()
    {
        this.InitializeComponent();
        this.timer = new System.Threading.Timer(this.UpdateValue);
    }

    private void UpdateValue(object state)
    {
        // Prevent the user from changing the value while we\'re doing
        // our expensive operation
        this.Invoke(new MethodInvoker(() => this.trackBar1.Enabled = false));

        // Do the expensive updates - this is still on a background thread
        this.updateCount++;

        this.Invoke(new MethodInvoker(this.UpdateUI));
    }

    private void UpdateUI()
    {
        this.label1.Text = this.updateCount.ToString();

        // Re-enable the track bar again
        this.trackBar1.Enabled = true;
    }

    private void trackBar1_ValueChanged(object sender, EventArgs e)
    {
        this.timer.Change(TimeSpan.FromMilliseconds(500), new TimeSpan(-1));
    }
}

public partial class Form1 : Form
{
    private int updateCount;
    private Timer timer;

    public Form1()
    {
        this.InitializeComponent();

        this.timer = new Timer();
        this.timer.Interval = 500;
        this.timer.Tick += this.Timer_Tick;
    }

    private void Timer_Tick(object sender, EventArgs e)
    {
        this.timer.Stop();

        this.updateCount++;
        this.label1.Text = this.updateCount.ToString();
    }

    private void trackBar1_ValueChanged(object sender, EventArgs e)
    {
        this.timer.Stop();
        this.timer.Start();
    }
}

Boolean user_done_updating = false;

private void MytrackBar_ValueChanged(object sender, EventArgs e)
{
    user_done_updating = true;
}

private void MytrackBar_MouseUp(object sender, MouseEventArgs e)
{
    if (user_done_updating)
    {
        user_done_updating = false;
        //Do Stuff
    }
}

KeyUp