Doc.Service/ApiMethod.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;
using Doc.Utility;

namespace Doc.Service
{
    public class ApiMethod
    {
        public IQueryable<Doc.Model.ApiMethod> Page(int pageindex, int pagesize,out int total, Expression<Func<Doc.Model.ApiMethod, bool>> predicate, List<SortCondition<Doc.Model.ApiMethod>> sortConditions
            )
        {
            var db = new Doc.DAL.DocContext();
            if (pagesize == 0)
            {
                pagesize = 10;
            }
            total = db.ApiMethod.Count(predicate);
            int pageCount = total / pagesize;
            if (total % pagesize != 0)
            {
                pageCount++;
            }

            if (pageindex > pageCount)
            {
                pageindex = pageCount;
            }
            if (pageindex <= 0)
            {
                pageindex = 1;
            }

            var source = db.ApiMethod.Where(predicate);
            source = source.OrderBy(sortConditions);
            return source?.Skip((pageindex - 1) * pagesize).Take(pagesize) ?? Enumerable.Empty<Doc.Model.ApiMethod>().AsQueryable();
        }
    }
    internal static class ExtentMethod
    {
        /// <summary>
        /// 排序
        /// </summary>
        /// <typeparam name="T">数据源对象类型</typeparam>
        /// <param name="source">数据源</param>
        /// <param name="sortConditions">排序方式</param>
        /// <returns>返回排序后的结果</returns>
        public static IQueryable<T> OrderBy<T>(this IQueryable<T> source, List<SortCondition<T>> sortConditions) where T : class , new()
        {
            if (source != null && sortConditions != null && sortConditions.Count > 0)
            {
                int count = 0;
                IOrderedQueryable<T> orderSource = null;
                foreach (SortCondition<T> sortCondition in sortConditions)
                {
                    orderSource = count == 0
                        ? CollectionPropertySorter<T>.OrderBy(source, sortCondition.SortField,