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显示数据加载功能

调用远端数据接口时,由于网络原因可能出现延时情况,可使用显示加载功能进行屏蔽

设置 ShowLoading 即可

Demo
Loading...

设置 ShowSkeleton 即可

Demo

设置 ShowLoadingInFirstRender 即可

Demo
@page "/tables/loading"

<h3>显示数据加载功能</h3>

<h4>调用远端数据接口时,由于网络原因可能出现延时情况,可使用显示加载功能进行屏蔽</h4>

<DemoBlock Title="基础用法" Introduction="设置 <code>ShowLoading</code> 即可" Name="ShowLoading">
    <Table TItem="Foo" PageItemsSource="@PageItemsSource" AutoGenerateColumns="true"
           IsPagination="true" IsStriped="true" IsBordered="true" IsMultipleSelect="true"
           ShowToolbar="true" ShowExtendButtons="true" ShowLoading="true" ShowSearch="true"
           OnAddAsync="@OnAddAsync" OnEditAsync="@OnEditAsync" OnSaveAsync="@OnSaveAsync" OnDeleteAsync="@OnDeleteAsync"
           OnQueryAsync="@OnQueryAsync">
        <TableColumns>
            <TableColumn @bind-Field="@context.Hobby" Items="@Hobbys" />
        </TableColumns>
    </Table>
</DemoBlock>

<DemoBlock Title="骨架屏" Introduction="设置 <code>ShowSkeleton</code> 即可" Name="ShowSkeleton">
    <Table TItem="Foo" PageItemsSource="@PageItemsSource" AutoGenerateColumns="true"
           IsPagination="true" IsStriped="true" IsBordered="true" IsMultipleSelect="true"
           ShowToolbar="true" ShowExtendButtons="true" ShowSkeleton="true" ShowSearch="true"
           OnAddAsync="@OnAddAsync" OnEditAsync="@OnEditAsync" OnSaveAsync="@OnSaveAsync" OnDeleteAsync="@OnDeleteAsync"
           OnQueryAsync="@OnQueryAsync">
        <TableColumns>
            <TableColumn @bind-Field="@context.Hobby" Items="@Hobbys" />
        </TableColumns>
    </Table>
</DemoBlock>

<DemoBlock Title="关闭加载动画" Introduction="设置 <code>ShowLoadingInFirstRender</code> 即可" Name="ShowLoadingInFirstRender">
    <Table TItem="Foo" PageItemsSource="@PageItemsSource" AutoGenerateColumns="true"
           IsPagination="true" IsStriped="true" IsBordered="true" IsMultipleSelect="true"
           ShowToolbar="true" ShowExtendButtons="true" ShowLoadingInFirstRender="false" ShowLoading="false" ShowSearch="true"
           OnAddAsync="@OnAddAsync" OnEditAsync="@OnEditAsync" OnSaveAsync="@OnSaveAsync" OnDeleteAsync="@OnDeleteAsync"
           OnQueryAsync="@OnQueryAsync">
        <TableColumns>
            <TableColumn @bind-Field="@context.Hobby" Items="@Hobbys" />
        </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 BootstrapBlazor.Components;
using Microsoft.AspNetCore.Components;
using Microsoft.Extensions.Localization;

namespace BootstrapBlazor.Shared.Samples.Table;

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

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

    [NotNull]
    private IEnumerable<SelectedItem>? Hobbys { get; set; }

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

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

        Hobbys = Foo.GenerateHobbys(Localizer);
        Items = Foo.GenerateFoo(Localizer);
    }

    private static async Task<Foo> OnAddAsync()
    {
        // 模拟延时
        await Task.Delay(1000);
        return new Foo() { DateTime = DateTime.Now };
    }

    private static async Task<Foo> OnEditAsync(Foo item)
    {
        // 模拟延时
        await Task.Delay(1000);
        return item;
    }

    private async Task<bool> OnSaveAsync(Foo item, ItemChangedType changedType)
    {
        // 模拟延时
        await Task.Delay(1000);
        if (changedType == ItemChangedType.Add)
        {
            item.Id = Items.Max(i => i.Id) + 1;
            Items.Add(item);
        }
        else
        {
            var oldItem = Items.FirstOrDefault(i => i.Id == item.Id);
            if (oldItem != null)
            {
                oldItem.Name = item.Name;
                oldItem.Address = item.Address;
                oldItem.DateTime = item.DateTime;
                oldItem.Count = item.Count;
                oldItem.Complete = item.Complete;
                oldItem.Education = item.Education;
            }
        }
        return true;
    }

    private async Task<bool> OnDeleteAsync(IEnumerable<Foo> items)
    {
        // 模拟延时
        await Task.Delay(1000);
        items.ToList().ForEach(i => Items.Remove(i));
        return true;
    }

    private async Task<QueryData<Foo>> OnQueryAsync(QueryPageOptions options)
    {
        // 模拟延时
        await Task.Delay(1000);

        IEnumerable<Foo> items = Items;

        // 处理高级搜索
        var searchModel = options.SearchModel as Foo;
        var isSearch = false;
        if (!string.IsNullOrEmpty(searchModel?.Name))
        {
            items = items.Where(item => item.Name?.Contains(searchModel.Name, StringComparison.OrdinalIgnoreCase) ?? false);
            isSearch = true;
        }

        if (!string.IsNullOrEmpty(searchModel?.Address))
        {
            items = items.Where(item => item.Address?.Contains(searchModel.Address, StringComparison.OrdinalIgnoreCase) ?? false);
            isSearch = true;
        }

        // 处理 Searchable=true 列与 SeachText 模糊搜索
        if (options.Searchs.Any())
        {
            items = items.Where(options.Searchs.GetFilterFunc<Foo>(FilterLogic.Or));
        }
        else
        {
            // 处理 SearchText 模糊搜索
            if (!string.IsNullOrEmpty(options.SearchText))
            {
                items = items.Where(item => (item.Name?.Contains(options.SearchText) ?? false)
                             || (item.Address?.Contains(options.SearchText) ?? false));
            }
        }

        // 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 new QueryData<Foo>()
        {
            Items = items,
            TotalCount = total,
            IsSorted = isSorted,
            IsFiltered = isFiltered,
            IsSearch = isSearch
        };
    }
}

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