我习惯于跟随 xaml 创建一个简单的赛车应用程序
<StackPanel>
<Slider x:Name="racerOne" Maximum="1000"/>
<Slider x:Name="racerTwo" Maximum="1000"/>
<Button Content="Start Race" Click="myButton_Click"/>
</StackPanel>
我使用以下代码
private void myButton_Click(object sender, RoutedEventArgs e)
{
Task firstRacer = Task.Run(() => Race(racerOne));
Task secondRacer = Task.Run(() => Race(racerTwo));
}
private void Race(Slider racer)
{
int step = 0;
while (step < 1000)
{
step += new Random().Next(0, 10);
Dispatcher.BeginInvoke(new ThreadStart(() => racer.Value = step));
Thread.Sleep(new Random().Next(0, 300));
}
}
大多数时候(假设 90%)两个滑块似乎一起移动,而在调试中我可以看到每个线程为step
. 怎么会?