多线程问题，子线程访问主线程控件，修改内容不实时！

[hanqing_liu]

public delegate void SetTextHander(Label lbl);

private void button1_Click(object sender, EventArgs e)
{
Thread.Sleep(1000);
Thread t1 = new System.Threading.Thread(new ThreadStart(() => SetLblText(lbl1)));
t1.IsBackground = true;
t1.Start();
Thread t2 = new System.Threading.Thread(new ThreadStart(() => SetLblText(lbl2)));
t2.IsBackground = true;
t2.Start();
}

public void SetLblText(Label lbl)
{
if (this.InvokeRequired)
{
SetTextHander sth = new SetTextHander(SetLblText);
this.BeginInvoke(sth, lbl);
}
else
{
//Application.DoEvents();
for (int i = 0; i < 10; i++)
{
Thread.Sleep(300);
lbl.Text = i.ToString();
}
}
}
需求：需要界面上控件值同时实时改变，互不影响！
求解答！

[bdmh]

  for (int i = 0; i < 10; i++)
  {
  lbl.Text = i.ToString();
  }

[hanqing_liu]

[Quote=引用 1 楼 的回复:]
C# code

for (int i = 0; i < 10; i++)
{
lbl.Text = i.ToString();
}
[/Quote]
去掉Thread.Sleep(300);
之后看不出来效果，不去掉的话怎么处理

[hanqing_liu]

解决了。分享下
public delegate void SetTextHander(Label lbl, int j);

Thread t1, t2;
private void button1_Click(object sender, EventArgs e)
{
t1 = new System.Threading.Thread(new ThreadStart(() => SetText(lbl1, 400)));
t1.IsBackground = true;
t1.Start();

t2 = new System.Threading.Thread(new ThreadStart(() => SetText(lbl2, 500)));
t2.IsBackground = true;
t2.Start();
}

public void SetText(Label lbl, int secends)
{
for (int i = 0; i < 1000; i++)
{
Thread.Sleep(secends);
SetLblText(lbl, i);
}
}

public void SetLblText(Label lbl, int j)
{
if (this.InvokeRequired)
{
SetTextHander sth = new SetTextHander(SetLblText);
this.BeginInvoke(sth, new object[] { lbl, j });
}
else
{
lock (lbl)
{
lbl.Text = j.ToString();
}
}
}

[yangfan1981]

没有测试你说的效果。
但我的理解是，线程调度由系统控制，不是休眠300ms之后就立即执行的。