47 lines
1.7 KiB
C#
47 lines
1.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Dynamic.Core;
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using System.Linq.Expressions;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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using Furion.DatabaseAccessor;
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using Furion.DatabaseAccessor.Extensions;
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using Mapster;
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namespace Ewide.Core.Extension
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{
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public static class PageExtensions
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{
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public static string OrderBuilder<T>(PageInputBase pageInput, bool descSort = true)
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{
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var type = typeof(T);
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var hasId = type.GetProperty("Id") != null;
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var hasSort = type.GetProperty("Sort") != null;
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var defaultField = hasSort ? "Sort" : (hasId ? "Id" : "");
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// 约定默认每张表都有Id排序
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var orderStr = string.IsNullOrEmpty(defaultField) ? "" : defaultField + (descSort ? " Desc" : " Asc");
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// 排序是否可用-排序字段和排序顺序都为非空才启用排序
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if (!string.IsNullOrEmpty(pageInput.SortField) && !string.IsNullOrEmpty(pageInput.SortOrder))
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{
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orderStr = $"{pageInput.SortField} {(pageInput.SortOrder == pageInput.DescStr ? "Desc" : "Asc")}";
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}
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return orderStr;
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}
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public static Task<PagedList<T>> ToPageData<T>(this IQueryable<T> source, PageInputBase input) where T : new()
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{
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return source.OrderBy(OrderBuilder<T>(input)).ToPagedListAsync(input.PageNo, input.PageSize);
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}
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public static Task<PagedList<O>> ToPageData<T, O>(this IQueryable<T> source, PageInputBase input) where O : new()
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{
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return source.OrderBy(OrderBuilder<T>(input)).Select(u => u.Adapt<O>()).ToPagedListAsync(input.PageNo, input.PageSize);
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}
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}
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}
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