private async Task RefreshDataAsync()
{
_refreshCts?.Cancel();
_refreshCts = new CancellationTokenSource();
var cancellationToken = _refreshCts.Token;
var request = new ItemsProviderRequest(_itemsBefore, _visibleItemCapacity, cancellationToken);
try
{
var result = await _itemsProvider(request);
// Only apply result if the task was not canceled.
if (!cancellationToken.IsCancellationRequested)
{
_itemCount = result.TotalItemCount;
_loadedItems = result.Items;
_loadedItemsStartIndex = request.StartIndex;
StateHasChanged();
}
}
catch (Exception e)
{
if (e is OperationCanceledException oce && oce.CancellationToken == cancellationToken)
{
// No-op; we canceled the operation, so it's fine to suppress this exception.
}
private async ValueTask RefreshDataCoreAsync(bool renderOnSuccess)
{
_refreshCts?.Cancel();
CancellationToken cancellationToken;
if (_itemsProvider == DefaultItemsProvider)
{
// If we're using the DefaultItemsProvider (because the developer supplied a fixed
// Items collection) we know it will complete synchronously, and there's no point
// instantiating a new CancellationTokenSource
_refreshCts = null;
cancellationToken = CancellationToken.None;
}
else
{
_refreshCts = new CancellationTokenSource();
cancellationToken = _refreshCts.Token;
}
var request = new ItemsProviderRequest(_itemsBefore, _visibleItemCapacity, cancellationToken);
try
{
var result = await _itemsProvider(request);
// Only apply result if the task was not canceled.
if (!cancellationToken.IsCancellationRequested)
{
_itemCount = result.TotalItemCount;
_loadedItems = result.Items;
_loadedItemsStartIndex = request.StartIndex;
if (renderOnSuccess)
{
StateHasChanged();
}
}
}
catch (Exception e)
{
if (e is OperationCanceledException oce && oce.CancellationToken == cancellationToken)
{
// No-op; we canceled the operation, so it's fine to suppress this exception.
}