1
這是我在長時間運行任務期間遇到UI阻塞問題的一段代碼。我看過其他一些似乎做同樣事情的例子,但這不起作用。我認爲這很簡單。在WPF C#5.0和.NET 4.5中阻止異步調用
我錯過了什麼?
public class ClipManager
{
async public Task<int> AddNewClipsAsync()
{
int rc = AddNewClips(); // does the work
return rc;
}
}
public partial class MainWindow : Window
{
private async void UpdateClick(object sender, RoutedEventArgs e)
{
// Check event to update library from WindowsMain.xml.cs
private async void UpdateClick(object sender, RoutedEventArgs e)
{
UpdateBtn.IsEnabled = false;
Console.WriteLine("Start of Update");
var cm = ClipManagement.Create();
int rc = await cm.AddNewClipsAsync(); // long running method
// UI unfreezes at this point
Console.WriteLine("After Update of Update");
await Task.Delay(30000); // just debugging code
Console.WriteLine("After delay");
LibraryDG.Items.Refresh();
UpdateBtn.IsEnabled = true;
}
}
}
['async'不會在後臺線程上運行您的代碼。](http://blogs.msdn.com/b/pfxteam/archive/2012/04/12/async-await-faq.aspx) – 2013-03-04 03:32:18