using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace PMS.BusinessModels.ModelExtend
{
    /// <summary>
    /// 创建人：伍莲魁
    /// 创建时间：2018/12/13
    /// 功能描述：分页相关方法
    /// </summary>
   public class PagingModel
    {
        /// <summary>
        /// 获取开始行
        /// </summary>
        public static int GetStartNum(string pageNumber, string pageSize, int defaultPage)
        {
            try
            {
                var _pageNum = string.IsNullOrEmpty(pageNumber) ? 1 : Convert.ToInt32(pageNumber);
                var _pageSize = string.IsNullOrEmpty(pageSize) ? defaultPage : Convert.ToInt32(pageSize);

                return (_pageSize * (_pageNum - 1) + 1);
            }
            catch (Exception)
            {
                return 0;
            }
        }
        /// <summary>
        /// 获取结束行
        /// </summary>
        public static int GetEndNum(string pageNumber, string pageSize, int defaultPage)
        {
            try
            {
                var _pageNum = string.IsNullOrEmpty(pageNumber) ? 1 : Convert.ToInt32(pageNumber);
                var _pageSize = string.IsNullOrEmpty(pageSize) ? defaultPage : Convert.ToInt32(pageSize);

                return (_pageSize * _pageNum);
            }
            catch (Exception)
            {
                return 0;
            }
        }
    }
}