所以我正在制作一個小型 WPF 應用程式。
我是 C# 和多執行緒的新手，我想按順序運行某些方法，但因為其中一種方法是異步的，所以它不按順序運行。
private async void LoadButton_Click(object sender, RoutedEventArgs e)
{
if (!OpenFile()) return; // opens a file dialog and ensure format is correct
await Task.Run(() =>
{
// some heavy task which I run here so that I dont freeze the UI
});
}
private void TheFunctionIwantToRunInSeqeuence(object sender, RoutedEventArgs e)
{
LoadButton_Click(sender, e);
SaveCareerInfoButton_Click(sender, e); // I want this line to wait for load to finish
LoadButton_Click(sender, e);
ImportCareerInfoButton_Click(sender, e); // I want this line to wait for the second load to finish
}
uj5u.com熱心網友回復：
也等待這些呼叫，稍微重構您的代碼.. 將處理程式的內容提取到單獨的方法中，并且不要在處理程式之間傳遞發送者和引數
private Task Load()
{
if (!OpenFile()) return;
return Task.Run(() =>
{
// some heavy task which I run here so that I dont freeze the UI
});
}
private async void LoadButton_Click(object sender, RoutedEventArgs e)
{
await Load();
}
private async void TheFunctionIwantToRunInSeqeuence(object sender, RoutedEventArgs e)
{
await Load();
// refactor your code to not pass sender, e.. SaveCareer();
SaveCareerInfoButton_Click(sender, e);
await Load();
// refactor your code to not pass sender, e.. ImportCareer();
ImportCareerInfoButton_Click(sender, e);
}
uj5u.com熱心網友回復：
您可以使用await等待異步函式完成并使函式TheFunctionIwantToRunInSeqeuence回傳async Task型別：
private async Task TheFunctionIwantToRunInSeqeuence(object sender, RoutedEventArgs e)
{
await LoadButton_Click(sender, e);
SaveCareerInfoButton_Click(sender, e); // I want this line to wait for load to finish
await LoadButton_Click(sender, e);
ImportCareerInfoButton_Click(sender, e); // I want this line to wait for the second load to finish
}
轉載請註明出處，本文鏈接：https://www.uj5u.com/caozuo/513328.html
標籤：C＃wpf异步等待