所以我是WPF的新手,我只是想做一个简单的小程序。当您点击开始按钮时,它将持续打印假代码,直到您点击停止按钮。我试图让它重复,直到停止按钮被击中10种不同的方式,但它们都没有工作。 TextBlock元素将更新一次(或从不),然后整个程序变得不可用并且加载光标出现。我猜这不是经历一个循环,然后更新TextBlocks,而是在后台执行所有操作,而不是直观地更新。
public partial class MainWindow : Window
{
System.Windows.Threading.DispatcherTimer dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
Random r1 = new Random();
bool stop = false;
int numUse
public MainWindow()
{
InitializeComponent();
dispatcherTimer.Interval = new TimeSpan(0, 0, 1);
dispatcherTimer.Start();
}
//Executes when the start button is hit, begins timer
private void Button_Click(object sender, RoutedEventArgs e)
{
do
{
dispatcherTimer.Tick += dispatcherTimer_Tick;
} while (stop == false);
}
//Executes when the stop button is hit, ends timers do while loop
private void Button_Click_1(object sender, RoutedEventArgs e)
{
stop = true;
}
private void dispatcherTimer_Tick(object sender, EventArgs e)
{
numUse = r1.Next(1, 2);
if (numUse == 1)
{
CodeBlock1.Text = "struct group_info init_groups = { .usage = ATOMIC_INIT(2) }; ";
CodeBlock2.Text = "";
CodeBlock3.Text = "struct group_info *groups_alloc(int gidsetsize){ ";
CodeBlock4.Text = "struct group_info *group_info; ";
CodeBlock5.Text = "int nblocks; ";
CodeBlock6.Text = "int i; ";
CodeBlock7.Text = "";
CodeBlock8.Text = "initialize stream";
}
else if (numUse == 2)
{
CodeBlock1.Text = "if (gidsetsize <= NGROUPS_SMALL) ";
CodeBlock2.Text = "group_info->blocks[0] = group_info->small_block; ";
CodeBlock3.Text = " else { ";
CodeBlock4.Text = " for (i = 0; i < nblocks; i++) { ";
CodeBlock5.Text = "b = (void *)__get_free_page(GFP_USER); ";
CodeBlock6.Text = " goto out_undo_partial_alloc; ";
CodeBlock7.Text = "} ";
CodeBlock8.Text = "";
} else
{
}
}
}
}
我尝试过循环,同时使用不同的顺序使用不同的方法。我知道我可能在走这些路线时搞砸了,所以任何方法都适合我的目的。显然我在这种情况下使用Timer。
答案 0 :(得分:4)
没有必要在dispatcherTimer.Tick += dispatcherTimer_Tick
的{{1}}循环中重复调用while
。我怀疑当这个循环运行时,消息泵上没有其他任何东西会运行,包括来自Button_Click
的滴答。
您可以取消DispatcherTimer
,只需通过从代码中的任何位置调用stop
直接对DispatcherTimer
采取行动。
也许这样:
Stop()