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Table Footer

For statistics

Set ShowFooter=true to show Footer custom total function

Demo

The Table component has a TableFooter template whose data context is the data collection of the Table component IEnumerable<TItem>

The associated context in the TableFooter template context is the current page data collection

The content of the cell td can be customized in the TableFooter template, or the built-in TableFooterCell component can be used for data display

Set FooterTemplate to customize the content displayed at the bottom of the table

Demo

Footer is displayed by default when there is no data. You can hide Footer by setting the @nameof(Table.IsHideFooterWhenNoData) parameter

@page "/tables/footer"

<h3>@Localizer["H1"]</h3>
<h4>@Localizer["H2"]</h4>

<DemoBlock Title="@Localizer["P1"]" Introduction="@Localizer["P2"]" Name="Statistics">
    <p>@((MarkupString)Localizer["P3"].Value)</p>
    <p>@((MarkupString)Localizer["P4"].Value)</p>
    <p>@((MarkupString)Localizer["P5"].Value)</p>
    <Table TItem="Foo" ShowFooter="true" class="footer-demo"
           IsPagination="true" PageItemsSource="@PageItemsSource" OnQueryAsync="@OnQueryAsync">
        <TableColumns>
            <TableColumn @bind-Field="@context.DateTime" Width="180" />
            <TableColumn @bind-Field="@context.Name" />
            <TableColumn @bind-Field="@context.Address" />
            <TableColumn @bind-Field="@context.Count" />
        </TableColumns>
        <TableFooter>
            <TableFooterCell Text="@Localizer["P6"]" colspan="3" Align="@Align" />
            <TableFooterCell Aggregate="@Aggregate" Field="@nameof(Foo.Count)" />
        </TableFooter>
    </Table>
    <div class="mt-3 btn-group">
        <Button Icon="fa-solid fa-align-left" Text="@Left" OnClick="() => Align = Alignment.Left" />
        <Button Icon="fa-solid fa-align-center" Text="@Center" OnClick="() => Align = Alignment.Center" />
        <Button Icon="fa-solid fa-align-right" Text="@Right" OnClick="() => Align = Alignment.Right" />
    </div>
    <div class="mt-3 btn-group">
        <Button Text="Sum" OnClick="() => Aggregate = AggregateType.Sum" />
        <Button Text="Average" OnClick="() => Aggregate = AggregateType.Average" />
        <Button Text="Count" OnClick="() => Aggregate = AggregateType.Count" />
        <Button Text="Min" OnClick="() => Aggregate = AggregateType.Min" />
        <Button Text="Max" OnClick="() => Aggregate = AggregateType.Max" />
    </div>
</DemoBlock>

<DemoBlock Title="@Localizer["P7"]" Introduction="@Localizer["P8"]" Name="FooterTemplate">
    <p>@((MarkupString)Localizer["P9"].Value)</p>
    <Table TItem="Foo" ShowFooter="true" class="footer-demo"
           IsPagination="true" PageItemsSource="@PageItemsSource" OnQueryAsync="@OnQueryAsync">
        <TableColumns>
            <TableColumn @bind-Field="@context.DateTime" Width="180" />
            <TableColumn @bind-Field="@context.Name" />
            <TableColumn @bind-Field="@context.Address" />
            <TableColumn @bind-Field="@context.Count" />
        </TableColumns>
        <FooterTemplate>
            <tr>
                <td colspan="4">
                    <div style="text-align: right;">
                        <span>@Localizer["P10"]</span>
                    </div>
                </td>
            </tr>
            <tr>
                <td colspan="3">
                    <div class="d-flex align-items-center justify-content-end" style="line-height: 3;">@Localizer["P11"]</div>
                </td>
                <td>
                    <div class="footer-customer">
                        <div>
                            Average: @GetAverage(context)
                        </div>
                        <hr />
                        <div>
                            Sum: @GetSum(context)
                        </div>
                    </div>
                </td>
            </tr>
        </FooterTemplate>
    </Table>
</DemoBlock>
// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/

namespace BootstrapBlazor.Shared.Samples.Table;

/// <summary>
/// 
/// </summary>
public sealed partial class TablesFooter
{
    [Inject]
    [NotNull]
    private IStringLocalizer<Foo>? LocalizerFoo { get; set; }

    [Inject]
    [NotNull]
    private IStringLocalizer<TablesFooter>? Localizer { get; set; }

    [Inject]
    [NotNull]
    private IStringLocalizer<TablesFooter>? LocalizerFooter { get; set; }

    private static IEnumerable<int> PageItemsSource => new int[] { 2, 4, 10, 20 };

    [NotNull]
    private IEnumerable<Foo>? Items { get; set; }

    [NotNull]
    private string? Left { get; set; }

    [NotNull]
    private string? Center { get; set; }

    [NotNull]
    private string? Right { get; set; }

    private Alignment Align { get; set; }

    private AggregateType Aggregate { get; set; }

    /// <summary>
    /// 
    /// </summary>
    protected override void OnInitialized()
    {
        base.OnInitialized();

        Items = Foo.GenerateFoo(LocalizerFoo);
        Left ??= LocalizerFooter[nameof(Left)];
        Center ??= LocalizerFooter[nameof(Center)];
        Right ??= LocalizerFooter[nameof(Right)];
    }

    private Task<QueryData<Foo>> OnQueryAsync(QueryPageOptions options)
    {
        // 设置记录总数
        var total = Items.Count();

        // 内存分页
        var items = Items.Skip((options.PageIndex - 1) * options.PageItems).Take(options.PageItems).ToList();

        return Task.FromResult(new QueryData<Foo>()
        {
            Items = items,
            TotalCount = total,
            IsSorted = true,
            IsFiltered = true,
            IsSearch = true
        });
    }

    private static double GetAverage(IEnumerable<Foo> items) => items.Any() ? items.Average(i => i.Count) : 0;

    private static int GetSum(IEnumerable<Foo> items) => items.Any() ? items.Sum(i => i.Count) : 0;
}

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