private void TransferItem()
{
while (true)
{
int item;
lock (_lockObj)
{
if (FirstItems.Count == 0)
{
break;
}
int n = new Random(unchecked ((int)DateTime.Now.Ticks)).Next(0, FirstItems.Count);//随机抽取出一项
item = FirstItems[n];
//在UI线程上同步执行，否则可能出现索引越界(会阻塞UI线程，在其中加入sleep可以很明显看出来)
UIDispatcherHelper.CheckInvokeOnUI(() =>
{
FirstItems.RemoveAt(n);
//Thread.Sleep(100);
});
}
UIDispatcherHelper.CheckBeginInvokeOnUI(() =>
{
SecondItems.Add(item);
});
Thread.Sleep(100);
}
}
private void RefreshHistoryInformation()
{
Task.Factory.StartNew(async() =>
{
var history = await UpdateService.GetUpdatesHistory();
UIDispatcherHelper.CallOnUIThread(() => { VersionChanges = history; });
});
}
void updateViewModel_CloseApplicationEventHandler(object sender, System.EventArgs e)
{
UIDispatcherHelper.CallOnUIThread(() => Application.Current.Shutdown());
}