using System.ComponentModel; using System.Windows.Threading; using System.Threading; using System.Windows; namespace MefBasic.Threading { public class BackgroundWorkerEx : BackgroundWorkerWrapper, IBackgroundWorkerEx { protected override void OnProgressChanged(ProgressChangedEventArgs e) { Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, new ParameterizedThreadStart(InvokeProcessChanged), e); } private void InvokeProcessChanged(object parameter) { var e = (ProgressChangedEventArgs)parameter; base.OnProgressChanged(e); } protected override void OnRunWorkerCompleted(RunWorkerCompletedEventArgs e) { InvokeRunWorkerCompleted(e); } private void InvokeRunWorkerCompleted(object parameter) { var e = (RunWorkerCompletedEventArgs)parameter; base.OnRunWorkerCompleted(e); IsWorkerBusy = false; } public void RunWorkerBlocked() { IsWorkerBusy = true; RunWorkerAsync(); Block(); } public void Block() { if (Application.Current == null) return; while (IsWorkerBusy) { DoEvents(); } } private static void DoEvents() { Application.Current.Dispatcher.Invoke(DispatcherPriority.Background, new ThreadStart(delegate { })); } public void RunWorkerBlocked(object parameter) { IsWorkerBusy = true; RunWorkerAsync(parameter); if (Application.Current == null) return; while (IsWorkerBusy) DoEvents(); } } }
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