public DownloadedTaskViewModel(DownloadingTaskViewModel task)
{
fullPath = task.CurrentFileFullPath;
Name = task.Name;
CompletedTime = DateTime.Now;
OpenCommand = new DependencyCommand(Open, DependencyCommand.AlwaysCan);
ShowCommand = new DependencyCommand(Show, DependencyCommand.AlwaysCan);
DeleteCommand = new DependencyCommand(Delete, DependencyCommand.AlwaysCan);
}
private static void Add(bool isAutoStart, DownloadingTaskViewModel task)
{
App.Current.Dispatcher.Invoke(() =>
{
_observableCollection.Add(task);
});
if (isAutoStart)
{
task.Start();
}
}
public static void NewCompleted(DownloadingTaskViewModel task)
{
DownloadedTaskViewModel record = new DownloadedTaskViewModel(task);
App.Current.Dispatcher.Invoke(() => _observableCollection.Insert(0, record));
record.Deleted += RemoveAfterDeleted;
void RemoveAfterDeleted(object sender, EventArgs e)
{
record.Deleted -= RemoveAfterDeleted;
App.Current.Dispatcher.Invoke(() => _observableCollection.Remove(record));
}
}
public static void NewTask(string downloadAddress, string localPath, string name, bool isAutoStart = true)
{
DownloadingTaskViewModel task = new DownloadingTaskViewModel(downloadAddress, localPath, name);
//当下载任务结束时从列表中移除任务信息
task.DownloadCompleted += (sender, e) =>
{
App.Current.Dispatcher.Invoke(() =>
{
try
{
_observableCollection.Remove(task);
if (File.Exists(task.CurrentFileFullPath))
{
DownloadedListViewModel.NewCompleted(task);
}
}
catch (Exception)
{
}
});
};
Add(isAutoStart, task);
}