using BootstrapBlazor.Components;
using Microsoft.AspNetCore.Components;
using Microsoft.Extensions.Localization;
using System.Collections.Concurrent;
using System.Diagnostics.CodeAnalysis;
using UI.Data;
namespace UI.Components.Pages {
///
///
///
public partial class Users {
[Inject]
[NotNull]
private IStringLocalizer? Localizer { get; set; }
///
/// 获得/设置 分页配置数据源
///
private static IEnumerable PageItemsSource => new int[] { 10, 20, 40 };
private static string GetAvatarUrl(int id) => $"images/avatars/150-{id}.jpg";
private static Color GetProgressColor(int count) => count switch
{
>= 0 and < 10 => Color.Secondary,
>= 10 and < 20 => Color.Danger,
>= 20 and < 40 => Color.Warning,
>= 40 and < 50 => Color.Info,
>= 50 and < 70 => Color.Primary,
_ => Color.Success
};
[NotNull]
private IEnumerable? Items { get; set; }
private static readonly ConcurrentDictionary, string, SortOrder, IEnumerable>> SortLambdaCache = new();
private Task> OnQueryAsync(QueryPageOptions options) {
// 此处代码实战中不可用,仅仅为演示而写防止数据全部被删除
if (Items == null || !Items.Any())
{
Items = Foo.GenerateFoo(Localizer, 23).ToList();
}
var items = Items;
var isSearched = false;
// 处理高级查询
if (options.SearchModel is Foo model)
{
if (!string.IsNullOrEmpty(model.Name))
{
items = items.Where(item => item.Name?.Contains(model.Name, StringComparison.OrdinalIgnoreCase) ?? false);
}
if (!string.IsNullOrEmpty(model.Address))
{
items = items.Where(item => item.Address?.Contains(model.Address, StringComparison.OrdinalIgnoreCase) ?? false);
}
isSearched = !string.IsNullOrEmpty(model.Name) || !string.IsNullOrEmpty(model.Address);
}
if (options.Searches.Any())
{
// 针对 SearchText 进行模糊查询
items = items.Where(options.Searches.GetFilterFunc(FilterLogic.Or));
}
// 过滤
var isFiltered = false;
if (options.Filters.Any())
{
items = items.Where(options.Filters.GetFilterFunc());
isFiltered = true;
}
// 排序
var isSorted = false;
if (!string.IsNullOrEmpty(options.SortName))
{
// 外部未进行排序,内部自动进行排序处理
var invoker = SortLambdaCache.GetOrAdd(typeof(Foo), key => LambdaExtensions.GetSortLambda().Compile());
items = invoker(items, options.SortName, options.SortOrder);
isSorted = true;
}
var total = items.Count();
return Task.FromResult(new QueryData()
{
Items = items.Skip((options.PageIndex - 1) * options.PageItems).Take(options.PageItems).ToList(),
TotalCount = total,
IsFiltered = isFiltered,
IsSorted = isSorted,
IsSearch = isSearched
});
}
}
}