Hi Oliver,

The property is called SummaryRow and each column has Summary property.

Example how to use it:

@page "/grid"

@using Smart.Blazor.Demos.Data
@inject WeatherForecastService ForecastService

<Example Name="Grid">
	<h1>Weather forecast</h1>

	<p>This component demonstrates fetching data from a service.</p>

	@if (forecasts == null)
	{
		<p><em>Loading...</em></p>
	}
	else
	{
		<Grid OnReady="GridReady" SummaryRow="summary" Sorting="@sorting" Appearance="@appearance" Selection="@selection" Style="width: 80%;">
			<Columns>
				<Column DataField="Date" Label="Date"></Column>
				<Column DataField="TemperatureC" Label="TemperatureC"></Column>
				<Column DataField="TemperatureF" Label="TemperatureF"></Column>
				<Column Summary="@columnSummary" DataField="Summary" Label="Summary"></Column>
			</Columns>
			<Rows>
				@foreach (var forecast in forecasts)
				{
					<Row>
						<Cell Content="@forecast.Date.ToShortDateString()"></Cell>
						<Cell Content="@forecast.TemperatureC"></Cell>
						<Cell Content="@forecast.TemperatureF"></Cell>
						<Cell Content="@forecast.Summary"></Cell>
					</Row>
				}
			</Rows>
		</Grid>
	}
</Example>

@code {
    string[] columnSummary = new string[] { "count" };

	GridSummaryRow summary = new GridSummaryRow() { Visible = true };
    GridSorting sorting = new GridSorting() { Enabled = true };
    GridAppearance appearance = new GridAppearance() { AlternationCount = 2 };
    GridSelection selection = new GridSelection()
    {
        Enabled = true,
        Mode = GridSelectionMode.Many,
        CheckBoxes = new GridSelectionCheckBoxes()
        {
            Enabled = true
        }
    };

    void GridReady(Grid grid)
    {
        var rows = grid.Rows;
        grid.SelectRows(new int[] { 0, 1, 2 });
    }
    private WeatherForecast[] forecasts;

    protected override async Task OnInitializedAsync()
    {
        forecasts = await ForecastService.GetForecastAsync(DateTime.Now);
    }
}

Best regards,
Peter Stoev

Smart UI Team
https://www.htmlelements.com/