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ExampleRazorC#Video

Table Excel

Commonly used for large data sheet maintenance

Get data collection through OnQueryAsync callback

Demo

When using the List<TItem> generic collection as a data source, you need to follow the steps below to set

1. Set the data source
Set the Items property of the Table component or the OnQueryAsync callback delegate method

protected override void OnInitialized()
{
    base.OnInitialized();

    Items = Foo.GenerateFoo(Localizer);
}

2. Handle the new logic
Set the OnAddAsync callback delegate function to handle the New logic

private Task<Foo> OnAddAsync()
{
    // The code here is sample code
    var foo = new Foo() { DateTime = DateTime.Now, Address = $"custom address {DateTime.Now.Second}" };
    Items.Insert(0, foo);

    // output log information
    Trace.Log($"Collection value change notification column: {Items.Count} - Type: Add");
    return Task.FromResult(foo);
}

3. Handle delete logic
Set the OnDeleteAsync callback delegate function to handle the delete logic

private Task<bool> OnDeleteAsync(IEnumerable<Foo> items)
{
    // The code here is sample code
    Items.RemoveAll(i => items.Contains(i));

    // output log information
    Trace.Log($"Collection value change notification column: {Items.Count} - Type: Delete");
    return Task.FromResult(true);
}

4. Handle the update logic
Set the OnSaveAsync callback delegate function to handle the cell update logic
After all cells in the component are edited and updated, the OnSaveAsync callback delegate will be automatically triggered, and the parameter is the current update model TItem

private Task<bool> OnDeleteAsync(Foo item, ItemChangedType changedType)
{
    // The code here is sample code
    Trace.Log($"Cell Change Notification Class: Foo - value: cell");
    return Task.FromResult(true);
}

Advanced usage

Demo
  • IsFixedHeader fixed header height is set to Height='500px'
  • Name is not editable display avatar
@page "/tables/excel"

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

<DemoBlock Title="@Localizer["P1"]" Introduction="@Localizer["P2"]" Name="OnQuery">
    <Table TItem="Foo" ShowToolbar="true" ShowRefresh="true" ShowColumnList="true" ShowExtendButtons="true"
           IsExcel="true" IsPagination="true" PageItemsSource="@PageItemsSource" 
           OnQueryAsync="@OnQueryAsync" OnAddAsync="@OnAddAsync" OnSaveAsync="@OnSaveAsync" OnDeleteAsync="@OnDeleteAsync">
        <TableColumns>
            <TableColumn @bind-Field="@context.DateTime" Width="180" />
            <TableColumn @bind-Field="@context.Name" />
            <TableColumn @bind-Field="@context.Address" Readonly="true" />
            <TableColumn @bind-Field="@context.Education" />
            <TableColumn @bind-Field="@context.Count" Editable="false" Align="Alignment.Right" />
            <TableColumn @bind-Field="@context.Complete" Align="Alignment.Center" />
        </TableColumns>
    </Table>

    <BlockLogger @ref="Trace" class="mt-3" />
</DemoBlock>

<p class="mt-3">@((MarkupString)Localizer["P3"].Value)</p>

<p>
    <div class="code-label">@((MarkupString)Localizer["P4"].Value)</div>
    <div class="mt-2">@((MarkupString)Localizer["P5"].Value)</div>
</p>

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

    Items = Foo.GenerateFoo(Localizer);
}</Pre>

<p>
    <div class="code-label">@((MarkupString)Localizer["P6"].Value)</div>
    <div class="mt-2">@((MarkupString)Localizer["P7"].Value)</div>
</p>

<Pre>private Task<Foo> OnAddAsync()
{
    // @Localizer["P8"]
    var foo = new Foo() { DateTime = DateTime.Now, Address = $"@Localizer["P8A"] {DateTime.Now.Second}" };
    Items.Insert(0, foo);

    // @Localizer["P9"]
    Trace.Log($"@Localizer["P10"]: {Items.Count} - @Localizer["P11"]: Add");
    return Task.FromResult(foo);
}</Pre>

<p>
    <div class="code-label">@((MarkupString)Localizer["P12"].Value)</div>
    <div class="mt-2">@((MarkupString)Localizer["P13"].Value)</div>
</p>

<Pre>private Task<bool> OnDeleteAsync(IEnumerable<Foo> items)
{
    // @Localizer["P14"]
    Items.RemoveAll(i => items.Contains(i));

    // @Localizer["P15"]
    Trace.Log($"@Localizer["P16"]: {Items.Count} - @Localizer["P17"]: Delete");
    return Task.FromResult(true);
}</Pre>

<p>
    <div class="code-label">@((MarkupString)Localizer["P18"].Value)</div>
    <div class="mt-2">@((MarkupString)Localizer["P19"].Value)</div>
    <div class="mt-2">@((MarkupString)Localizer["P20"].Value)</div>
</p>

<Pre>private Task<bool> OnDeleteAsync(Foo item, ItemChangedType changedType)
{
    // @Localizer["P21"]
    Trace.Log($"@Localizer["P22"] - @Localizer["P23"]");
    return Task.FromResult(true);
}</Pre>

<DemoBlock Title="@Localizer["P24"]" Introduction="@Localizer["P25"]" Name="CellRender">
    <ul class="ul-demo mb-3">
        <li>@((MarkupString)Localizer["P26"].Value)</li>
        <li>@((MarkupString)Localizer["P27"].Value)</li>
    </ul>
    <Table TItem="Foo" Items="@Items" IsBordered="true" IsExcel="true" IsFixedHeader="true" Height="500">
        <TableColumns>
            <TableColumn @bind-Field="@context.Name" Width="200">
                <EditTemplate Context="row">
                    <div class="d-flex disabled">
                        <div>
                            <img src="@Foo.GetAvatarUrl(row!.Id)" class="bb-avatar" />
                        </div>
                        <div class="ps-2">
                            <div>@row.Name</div>
                            <div class="bb-sub">@Foo.GetTitle(row!.Id)</div>
                        </div>
                    </div>
                </EditTemplate>
            </TableColumn>
            <TableColumn @bind-Field="@context.Address" />
            <TableColumn @bind-Field="@context.Education" Width="160" />
            <TableColumn @bind-Field="@context.Count" Width="160">
                <EditTemplate Context="row">
                    <div class="disabled">
                        <div>@row!.Count %</div>
                        <Progress Value="@row.Count" Color="@Foo.GetProgressColor(row.Count)"></Progress>
                    </div>
                </EditTemplate>
            </TableColumn>
            <TableColumn @bind-Field="@context.Complete" Align="Alignment.Center" Width="80" />
        </TableColumns>
    </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/

using System.Data;

namespace BootstrapBlazor.Shared.Samples.Table;

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

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

    [NotNull]
    private BlockLogger? Trace { get; set; }

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

        Items = Foo.GenerateFoo(LocalizerFoo);
    }

    // 绑定数据源代码
    private static IEnumerable<int> PageItemsSource => new int[] { 10, 20, 40 };

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

    private Task<QueryData<Foo>> OnQueryAsync(QueryPageOptions options)
    {
        IEnumerable<Foo> items = Items;

        // 过滤
        var isFiltered = false;
        if (options.Filters.Any())
        {
            items = items.Where(options.Filters.GetFilterFunc<Foo>());
            isFiltered = true;
        }

        // 排序
        var isSorted = false;
        if (!string.IsNullOrEmpty(options.SortName))
        {
            var invoker = Foo.GetNameSortFunc();
            items = invoker(items, options.SortName, options.SortOrder);
            isSorted = true;
        }

        // 设置记录总数
        var total = items.Count();

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

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

    private Task<Foo> OnAddAsync()
    {
        // Excel 模式下新建要求更改数据源
        var foo = new Foo() { DateTime = DateTime.Now, Address = $"自定义地址  {DateTime.Now.Second}" };
        Items.Insert(0, foo);

        // 输出日志信息
        Trace.Log($"集合值变化通知 列: {Items.Count} - 类型: Add");
        return Task.FromResult(foo);
    }

    private Task<bool> OnSaveAsync(Foo item, ItemChangedType changedType)
    {
        // 对象已经更新
        // 输出日志信息
        Trace.Log($"单元格变化通知 类: Foo - 值: 单元格");
        return Task.FromResult(true);
    }

    private Task<bool> OnDeleteAsync(IEnumerable<Foo> items)
    {
        Items.RemoveAll(i => items.Contains(i));

        // 输出日志信息
        Trace.Log($"集合值变化通知 列: {Items.Count} - 类型: Delete");
        return Task.FromResult(true);
    }
}

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