与此相同Question,但最后一个答案是我想要的那个..我需要c#wpf ...我尝试了最后一个答案,但我似乎无法获得间隔...有时候关键可以看到按下,有时它不会......按键时怎样才能获得相同的间隔?
private void TextBox_KeyDown(object sender, KeyEventArgs e)
{
dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 1);
dispatcherTimer.Start();
}
我试过
dispatcherTimer.Interval = TimeSpan.FromSeconds(5);
但仍然相同......
修改
private void dispatcherTimer_Tick(object sender, EventArgs e)
{
string str = "";
for(int i = 0; i < txtPass.Text.Length; i++)
str += char.ConvertFromUtf32(8226);
txtPass.Text = str;
txtPass.Select(txtPass.Text.Length, 0);
}
答案 0 :(得分:1)
您不需要每次都订阅新的事件处理程序。只需在构造函数中执行一次
dispatcherTimer = new DispatcherTimer();
dispatcherTimer.Tick += dispatcherTimer_Tick;
dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 1);
在Keydown
事件中,只需重置timer
(很遗憾,我们没有任何Reset
方法)
private void TextBox_KeyDown(object sender, KeyEventArgs e)
{
dispatcherTimer.Stop();
dispatcherTimer.Start();
}
当计时器打勾时,只需Stop
计时器并开始工作
void dispatcherTimer_Tick(object sender, EventArgs e)
{
dispatcherTimer.Stop();
//your code
}