一个通用的分页类

在项目中用到一个通用的分页类，感觉很好用，分享一下，直接来代码：

//-----------------------------------------------------------------------
// <copyright file="StandardPageResult" company="FenSiShengHuo, Ltd.">
//     Copyright (c) 2018 , All rights reserved.
// </copyright>
//-----------------------------------------------------------------------

namespace DotNet.MVC.Infrastructure.Paging
{
    /// <summary>
    /// 分页结果实体
    /// </summary>
    public class PageResult
    {
        /// <summary>
        /// 状态
        /// </summary>
        public bool Status { get; set; } = true;

        /// <summary>
        /// 消息
        /// </summary>

        public string StatusMessage { get; set; }

        /// <summary>
        ///  当前页
        /// </summary>
        public int PageIndex { get; set; }

        /// <summary>
        /// 每页大小
        /// </summary>
        public int PageSize { get; set; }

        /// <summary>
        /// 总数据量
        /// </summary>
        public int TotalCount { get; set; }

        /// <summary>
        /// 总页数
        /// </summary>
        public int TotalPages { get; set; }

        /// <summary>
        /// 有没有前一页
        /// </summary>
        public bool HasPreviousPage => (PageIndex > 0);

        /// <summary>
        /// 有没有下一页
        /// </summary>
        public bool HasNextPage => (PageIndex + 1 < TotalPages);

    }

    /// <summary>
    /// 分页数据
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class PageResult<T> : PageResult
    {
        public T Value { get; set; }
        public PageResult()
        {
        }

        /// <summary>
        /// source 从数据库查询出来的就是分页的结果
        /// </summary>
        /// <param name="source"></param>
        /// <param name="request"></param>
        /// <param name="totalCount"></param>
        public PageResult(T source, PageRequest request, int totalCount) : this()
        {
            if (request.PageSize == 0)
            {
                return;
            }
            TotalCount = totalCount;
            TotalPages = TotalCount / request.PageSize;

            if (TotalCount % request.PageSize > 0)
                TotalPages++;

            this.PageSize = request.PageSize;
            this.PageIndex = request.PageIndex;
            this.Value = source;
        }
    }
}

/// <summary>
/// 分页扩展方法
/// </summary>
namespace DotNet.MVC.Infrastructure.Paging
{
    public static class PageResultExtension
    {
        /// <summary>
        /// 分页扩展
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="source"></param>
        /// <param name="request"></param>
        /// <param name="totalCount"></param>
        /// <returns></returns>
        public static PageResult<T> ToPageResult<T>(this T source, PageRequest request, int totalCount)
        {
            return new PageResult<T>(source, request, totalCount);
        }
    }
}

使用方法参考

WechatAccountSettingManager manager = new WechatAccountSettingManager();
            DataTable dt = manager.GetDataTableByPage(out recordCount, pager.PageIndex, pager.PageSize, conditions, manager.DbHelper.MakeParameters(dbParameters), pager.Sort + " " + pager.SortDirection);
            List<WechatAccountSettingEntity> list = BaseEntity.GetList<WechatAccountSettingEntity>(dt);
            PageResult<List<WechatAccountSettingEntity>> result = list.ToPageResult(pager, recordCount);

这个分页可以对后台任意对象进行输出，包括List<T>，IList<T>，DataTable等任意集合对象