C#:当事件发生时立即执行它';提高
我目前正在用C#和WPF开发一个文本到语音的应用程序 要重新开始播放,我需要先取消播放,然后再重新开始播放。C#:当事件发生时立即执行它';提高,c#,wpf,events,text-to-speech,C#,Wpf,Events,Text To Speech,我目前正在用C#和WPF开发一个文本到语音的应用程序 要重新开始播放,我需要先取消播放,然后再重新开始播放。 我在SpeakCompletedEventHandler中添加了一个函数(speaker\u finished()),在播放完成或取消时调用该函数speaker_finished()调用outputVisible(false),将某些UI元素设置为不可见。但当我重新启动播放时,我希望它们保持可见。 对于该outputVisible(true)在speaker.SpeakAsyncCanc
我在
SpeakCompleted
EventHandler中添加了一个函数(speaker\u finished()
),在播放完成或取消时调用该函数speaker_finished()
调用outputVisible(false)
,将某些UI元素设置为不可见。但当我重新启动播放时,我希望它们保持可见。对于该
outputVisible(true)
在speaker.SpeakAsyncCancelAll()之后调用。这将取消播放,然后将UI元素设置为可见。
问题是speaker\u finished()
在按钮重新启动后被调用,因此太晚了。我希望在使用speaker.SpeakAsyncCancelAll()
取消播放之后以及调用outputVisible(true)
之前立即调用它
我怎样才能做到这一点
SpeechSynthesizer speaker = new SpeechSynthesizer();
private void buttonRestart_Click(object sender, RoutedEventArgs e)
{
speaker.SpeakAsyncCancelAll();
outputVisible(true); //this function needs to be called after the function in the event handler
speaker_Start();
}
//function in the EventHandler of SpeakFinished
private void speaker_Finished(object sender, SpeakCompletedEventArgs e)
{
outputVisible(false);
}
//function that changes the visibility
private void outputVisible(bool b)
{
if(b)
{
textBlockOutput.Visibility = Visibility.Visible;
foreach (UIElement UIEle in GridPlaybackButtons.Children)
{
UIEle.Visibility = Visibility.Visible;
}
}
else
{
textBlockOutput.Visibility = Visibility.Hidden;
foreach (UIElement UIEle in GridPlaybackButtons.Children)
{
UIEle.Visibility = Visibility.Hidden;
}
}
}
//function that starts the SpeechSynthesizer
private void speaker_Start()
{
if (speaker.State == SynthesizerState.Ready)
{
speaker.SpeakAsync(speakString);
}
else
{
MessageBox.Show("There already is a text being output!","Error!", MessageBoxButton.OK);
}
}
SpeechSynthesizer
也有一个SpeakStarted
事件。尝试为其添加事件处理程序,就像对SpeakCompleted
private void speaker_Started(object sender, SpeakStartedEventArgs e)
{
outputVisible(true);
}
SpeechSynthesizer
也有一个SpeakStarted
事件。尝试为其添加事件处理程序,就像对SpeakCompleted
private void speaker_Started(object sender, SpeakStartedEventArgs e)
{
outputVisible(true);
}