Questions on UI for Blazor Forum

3 questions

1 answer

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IAsyncEnumerable Support for Telerik Data Source Response

In .NET 8, Microsoft will be introducing support for IAsyncEnumerable JSON deserialization (Streaming deserialization APIs). This feature allows for items in a long list to be deserialized as they are streamed to the client from a server, rather than waiting for the entire request to be completed. So it will result in a perceived performance increase. Is there any chance for Progress to look into bringing support for this feature to Telerik Data Source Responses? I can anticipate the data field in the response class makes this a challenging ask. Also, the server-side needs to be able to return yield for async items. I am interested in seeing this feature implemented so the grids in my applications that have many items will begin to be usable sooner.

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answered on 19 Sep 2023

1 answer

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TelerikAutoComplete Loader

Hi,

I am trying to implement a loading spinner with the <TelerikAutoComplete> control.

I have overriden the <NoDataTemplate>

<p>@IsLoading</p>
<TelerikAutoComplete
    @ref="@AutoCompleteControl"
    Data="ActiveDataSet"
    @bind-Value="SearchTerm"
    DebounceDelay="500"
    Placeholder="Search here..."
    FilterOperator="StringFilterOperator.Contains"
    ClearButton="true">
    <NoDataTemplate>
        @if (IsLoading)
        {
            <TelerikLoader Visible="true"
                           Size="@ThemeConstants.Loader.Size.Large"
                           ThemeColor="@ThemeConstants.Loader.ThemeColor.Tertiary"
                           Type="@LoaderType.ConvergingSpinner"/>
        }
        else
        {
            <p>No Data</p>
        }
    </NoDataTemplate>
</TelerikAutoComplete>

From the setter of SearchTerm I call 'Search'

where I'm getting the data and updating my 'IsLoading'

private async Task Search(string searchTerm)
{
    try
    {
        // Long running search that updates the data
    }
    finally
    {
        IsLoading = false;
        StateHasChanged();
        // AutoCompleteControl.Rebind(); // Without this the loading spinner never goes away
    }
    
}

If I don't include the AutoCompleteControl.Rebind(); the loading indicator never goes away, despite the Data being updated and IsLoading being set to false.

Is there something I'm missing about how to update the binding inside the <NoDataTemplate>?

Thanks!

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