update 封装分页,排序,过滤字段

Api/Ewide.Core/Extension/PageExtensions.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Dynamic.Core;
+using System.Linq.Expressions;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using Furion.DatabaseAccessor;
+using Furion.DatabaseAccessor.Extensions;
+using Mapster;
+
+namespace Ewide.Core.Extension
+{
+    public static class PageExtensions
+    {
+        public static string OrderBuilder<T>(PageInputBase pageInput, bool descSort = true)
+        {
+            var type = typeof(T);
+            var hasId = type.GetProperty("Id") == null;
+
+            var defaultField = hasId ? "Sort" : "Id";
+
+            // 约定默认每张表都有Id排序
+            var orderStr = defaultField + (descSort ? " Desc" : " Asc");
+
+            // 排序是否可用-排序字段和排序顺序都为非空才启用排序            
+            if (!string.IsNullOrEmpty(pageInput.SortField) && !string.IsNullOrEmpty(pageInput.SortOrder))
+            {
+                orderStr = $"{pageInput.SortField} {(pageInput.SortOrder == pageInput.DescStr ? "Desc" : "Asc")}";
+            }
+            return orderStr;
+        }
+
+        public static Task<PagedList<T>> ToPageData<T>(this IQueryable<T> source, PageInputBase input) where T : new()
+        {
+            return source.OrderBy(OrderBuilder<T>(input)).ToPagedListAsync(input.PageNo, input.PageSize);
+        }
+
+        public static Task<PagedList<O>> ToPageData<T, O>(this IQueryable<T> source, PageInputBase input) where O : new()
+        {
+            return source.OrderBy(OrderBuilder<T>(input)).Select(u => u.Adapt<O>()).ToPagedListAsync(input.PageNo, input.PageSize);
+        }
+    }
+}