private void Flyout_Opened(object sender, object e)
{
Tools.rootPage.ShowProgressBar();
Flyout flyout = sender as Flyout;
Grid mainGrid = (flyout.Content as Grid);
FeedReplyViewModel feedReplyViewModel = (mainGrid.Tag as FeedReplyViewModel);
if (feedReplyViewModel != null)
{
TitleBar titleBar = mainGrid.FindName("TitleBar") as TitleBar;
FlyoutData data = new FlyoutData {
id = feedReplyViewModel.id
};
titleBar.TitleHeight = 48;
titleBar.BackButtonClick += (s, ee) => flyout.Hide();
titleBar.Title = $"回复({feedReplyViewModel.replyTotal})";
titleBar.RefreshButtonClick += (s, ee) => GetReplys((s as FrameworkElement).Tag as FlyoutData, true);
titleBar.RefreshButtonTag = data;
ScrollViewer scrollViewer = (mainGrid.FindName("ScrollViewer") as ScrollViewer);
scrollViewer.Tag = data;
scrollViewer.ViewChanged += (s, ee) =>
{
ScrollViewer VScrollViewer = s as ScrollViewer;
if (VScrollViewer.VerticalOffset == 0)
{
GetReplys(VScrollViewer.Tag as FlyoutData, true);
}
else if (VScrollViewer.VerticalOffset == VScrollViewer.ScrollableHeight)
{
GetReplys(VScrollViewer.Tag as FlyoutData, false);
}
};
data.VScrollViewer = scrollViewer;
ListView listView = scrollViewer.FindName("FeedReplyList") as ListView;
listView.ItemsSource = data.replys;
feedReplyViewModel.showreplyRows = false;
data.replys.Add(feedReplyViewModel);
mainGrid.Tag = data;
}
if (mainGrid.Tag is FlyoutData d && d.page == 0)
{
GetReplys(d, false);
}
Tools.rootPage.HideProgressBar();
}
async void GetReplys(FlyoutData data, bool isRefresh)
{
Tools.rootPage.ShowProgressBar();
int page = isRefresh ? 1 : ++data.page;
string result = await Tools.GetJson($"/feed/replyList?id={data.id}&listType=&page={page}{(page > 1 ? $"&lastItem={data.lastItem}" : string.Empty)}&discussMode=0&feedType=feed_reply&blockStatus=0&fromFeedAuthor=0");
JsonArray array = Tools.GetDataArray(result);
if (array != null && array.Count > 0)
{
if (isRefresh)
{
data.VScrollViewer.ChangeView(null, 0, null);
var d = (from a in data.replys
from b in array
where a.id == b.GetObject()["id"].GetNumber()
select a).ToArray();
foreach (var item in d)
{
data.replys.Remove(item);
}
for (int i = 0; i < array.Count; i++)
{
data.replys.Insert(i + 1, new FeedReplyViewModel(array[i]));
}
}
else
{
foreach (var item in array)
{
data.replys.Add(new FeedReplyViewModel(item, false));
}
data.lastItem = array.Last().GetObject()["id"].GetNumber();
}
}
else if (!isRefresh)
{
data.page--;
}
Tools.rootPage.HideProgressBar();
}