Grid filtering throws 'System.OperationCanceledException' in System.Private.CoreLib.dll

[resignationinfinite]

I have just implemented filtering on an HxGrid with the following code:

<HxInputText Label="Filter Donors" @bind-Value="filterOptOutDonorString" BindEvent="BindEvent.OnInput" @bind-Value:after="optedOutGrid.RefreshDataAsync" />
<HxGrid @ref="optedOutGrid" PageSize="10" TItem="Donor" Responsive="true" DataProvider="GetOptedOutGridData">
    <Columns>
        <HxGridColumn HeaderText="ID" ItemTextSelector="donor => donor.Id.ToString()" SortKeySelector="donor => donor.Id" />
        <HxGridColumn HeaderText="Donor Name" ItemTextSelector="donor => donor.Name" SortKeySelector="donor => donor.Name" IsDefaultSortColumn="true" />
        <HxGridColumn HeaderText="Company" ItemTextSelector="donor => donor.Company" SortKeySelector="donor => donor.Company" />
        <HxGridColumn HeaderText="Address Line 1" ItemTextSelector="donor => donor.Address1" SortKeySelector="donor => donor.Address1" />
        <HxGridColumn HeaderText="Address Line 2" ItemTextSelector="donor => donor.Address2" SortKeySelector="donor => donor.Address2" />
        <HxGridColumn HeaderText="Address Line 3" ItemTextSelector="donor => donor.Address3" SortKeySelector="donor => donor.Address3" />
        <HxGridColumn HeaderText="City" ItemTextSelector="donor => donor.City" SortKeySelector="donor => donor.City" />
        <HxGridColumn HeaderText="State" ItemTextSelector="donor => donor.State" SortKeySelector="donor => donor.State" />
        <HxGridColumn HeaderText="Postal Code" ItemTextSelector="donor => donor.PostalCode" SortKeySelector="donor => donor.PostalCode" />
        <HxGridColumn HeaderText="Country" ItemTextSelector="donor => donor.Country" SortKeySelector="donor => donor.PhoneNumber" />
        <HxGridColumn HeaderText="Phone" ItemTextSelector="donor => donor.PhoneNumber" SortKeySelector="donor => donor.Country" />
        <HxGridColumn HeaderText="Email" ItemTextSelector="donor => donor.Email" SortKeySelector="donor => donor.Email" />
        <HxGridColumn HeaderText="Actions">
            <ItemTemplate Context="donor">
                <HxButton Text="Remove" Color="ThemeColor.Danger" OnClick="async () => await DeleteDonorAsync(donor)" />
            </ItemTemplate>
        </HxGridColumn>
    </Columns>
</HxGrid>

private async Task<GridDataProviderResult<Donor>> GetOptedOutGridData(GridDataProviderRequest<Donor> request)
{
    try
    {
        var retrievedDonors = await DonorService.GetOptOutDonorsAsync();
        optedOutDonors = retrievedDonors.Where(i => i.Name?.Contains(filterOptOutDonorString) ?? true).ToList();
        return await Task.FromResult(request.ApplyTo(optedOutDonors));
    }
    catch
    {
        return new GridDataProviderResult<Donor>();
    }
}

When using the filter function, I am getting tons of OperationCanceledException thrown in the logs, although the functionality appears to be working fine.

TIA for the assistance.

[hakenr]

Not sure what you mean by "in the logs", but OperationCanceledException is a regular outcome of using CancelationTokens and canceling the operation. For example, when you are scrolling the grid, the DataProvider gets called for visible ranges of items. When you scroll to another part of the dataset while the original DataProvider-request is still running, it gets canceled.

Ideally, you should pass the CancelationToken to your GetOptOutDonorsAsync() as DonorService.GetOptOutDonorsAsync(requrest.CancelationToken) and allow it to cancel the async operation in its own way (ie. by passing the CancelationToken to underlying Entity Framework call or similar infrastructure code).

For more details refer to https://learn.microsoft.com/en-us/dotnet/standard/threading/cancellation-in-managed-threads

[resignationinfinite]

I actually refactored the code so that GetOptOutDonorsAsync() is no longer called from the Grid data method, as I realized this combined with the filter function was really thrashing the database with many needless requests as well as causing the above mentioned exception to be thrown. Thank you and I apologize for bothering you unneccessarily.