radzen-blazor/RadzenBlazorDemos/Pages/FieldsetConfig.razor

@using RadzenBlazorDemos.Data
@using RadzenBlazorDemos.Models.Northwind
@using Microsoft.EntityFrameworkCore

@inherits DbContextPage

<RadzenFieldset AllowCollapse="true" Style="width: 700px; margin: 40px auto;" ExpandTitle="Expand orders." CollapseTitle="Collapse orders."
                ExpandAriaLabel="Expand the list of orders." CollapseAriaLabel="Collapse the list of orders."
                Expand=@(() => Change("Fieldset expanded")) Collapse=@(() => Change("Fieldset collapsed"))>
    <HeaderTemplate>
        <RadzenStack Orientation="Orientation.Horizontal" Gap="0.25rem">
            <RadzenIcon Icon="account_box" /><b>Orders</b>
        </RadzenStack>
    </HeaderTemplate>
    <ChildContent>
        <RadzenDataList PageSize="4" WrapItems="true" AllowPaging="true" 
                        Data="@orders" TItem="Order">
            <Template Context="order">
                <RadzenCard Style="width: 250px">
                    <RadzenStack Gap="1rem">
                        <RadzenRow>
                            <RadzenColumn Size="8" class="rz-text-truncate">
                                <RadzenBadge BadgeStyle="BadgeStyle.Light" Text=@($"{order.OrderID}") class="rz-me-1" />
                                <b>@(order.ShipName)</b>
                            </RadzenColumn>
                            <RadzenColumn Size="4" class="rz-text-align-end">
                                <RadzenBadge BadgeStyle="BadgeStyle.Success" Text=@($"{String.Format(new System.Globalization.CultureInfo("en-US"), "{0:C}", order.Freight)}") />
                            </RadzenColumn>
                        </RadzenRow>

                        <hr style="border: none; background-color: var(--rz-base-600); height: 1px; margin: 0;" />

                        <RadzenStack Orientation="Orientation.Horizontal">
                            <RadzenImage Path="@order.Employee?.Photo" Style="width: 80px; height: 80px; border-radius: 50%;" AlternateText="@(order.Employee?.FirstName + " " + order.Employee?.LastName)" />
                            <RadzenStack Gap="0.25rem">
                                <RadzenText TextStyle="TextStyle.H4" TagName="TagName.P" class="rz-mb-0">@(order.Employee?.FirstName + " " + order.Employee?.LastName)</RadzenText>
                                <div>@order.ShipAddress</div>
                                <div style="font-size: .8em">@(order.ShipCity), @(order.ShipCountry)</div>
                            </RadzenStack>
                        </RadzenStack>
                    </RadzenStack>
                </RadzenCard>
            </Template>
        </RadzenDataList>
    </ChildContent>
    <SummaryTemplate>
        <RadzenCard class="rz-mt-4">
            <b>@orders.Count() Orders</b>
        </RadzenCard>
    </SummaryTemplate>
</RadzenFieldset>

<EventConsole @ref=@console />

@code {
    EventConsole console;
    IEnumerable<Order> orders;

    protected override async Task OnInitializedAsync()
    {
        await base.OnInitializedAsync();

        orders = dbContext.Orders.Include("Customer").Include("Employee").ToList();
    }

    void Change(string text)
    {
        console.Log($"{text}");
    }
}