public override async void Load(object userState)
{
_currentUserState = userState;
if (IsBusy)
{
return;
}
if (AsyncRemoteCollectionView.PageIndex < 0)
{
return;
}
IsBusy = true;
LoadStarted?.Invoke(this, EventArgs.Empty);
try
{
var result = await _load();
CurrentResult = result;
_onLoadCompleted?.Invoke(result);
OnLoadCompleted(new AsyncCompletedEventArgs(result.Error, result.IsCanceled, _currentUserState));
}
catch (Exception ex)
{
OnLoadCompleted(new AsyncCompletedEventArgs(ex, false, null));
}
finally
{
IsBusy = false;
}
}
public void Handle(string file, ILoadResult result)
{
switch (result)
{
case LoadBusy:
Log($"[{file}]\nLoading...");
hoveredFile = null;
break;
case LoadFailure f:
Log($"[{file}]\n{f.message}");
hoveredFile = null;
break;
case LoadSuccess s:
Log($"[{file}]\nLoaded successfully");
hoveredFile = s.preview;
break;
case LoadNonexistent s:
Log($"[{file}]\nDoes not exist");
hoveredFile = null;
break;
}
}
protected override void OnLoadCompleted(object sender, AsyncCompletedEventArgs e)
{
IsRefreshing = false;
Refreshed?.Invoke(this, EventArgs.Empty);
var loader = CollectionViewLoader as AsyncRemoteCollectionViewLoader;
ILoadResult operation = loader.CurrentResult;
if (operation.Error != null || operation.IsCanceled)
{
return;
}
IEnumerable <object> result = operation.Result.Cast <object>();
var source = CollectionView.SourceCollection as List <object>;
source.Clear();
foreach (var item in result)
{
source.Add(item);
}
SetTotalItemCount(operation.TotalCount);
base.OnLoadCompleted(sender, e);
}
/// <summary>
/// Update the observable result collections.
/// </summary>
/// <param name="result">The results of the completed load operation.</param>
private protected virtual void UpdateResults(ILoadResult result)
{
if (result == null)
{
throw new ArgumentNullException(nameof(result));
}
// if the Entities property has been examined, update the backing
// observable collection
this._entities?.Reset(result.Entities);
// if the AllEntities property has been examined, update the backing
// observable collection
this._allEntities?.Reset(result.AllEntities);
}
private void OnAsyncLoadCompleted(ILoadResult loadResult)
{
//MessageBox.Show("LoadCompleted");
}
private void OnAsyncLoadCompleted(ILoadResult loadResult)
{
}
