C#简单的通用分页

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通用分页技术分析

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Demo 代码

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace NBAManagement

{

    /// <summary>

    /// 通过的分页类

    /// </summary>

    /// <typeparam name="T"></typeparam>

    public class Paging<T>

    {

        public List<T> DataSource = new List<T>();

        public int PageIndex { get; set; }

        public int AllPage { get; set; }

        public int EachCount { get; set; }

        public Paging(List<T> dataSource, int eachCount)

        {

            this.DataSource = dataSource;

            this.AllPage = (int)Math.Ceiling((double)this.DataSource.Count / eachCount);

            this.EachCount = eachCount;

            this.PageIndex = 1;

        }

        //下一页

        public List<T> Next()

        {

            PageIndex++;

            if (this.PageIndex > AllPage)

                PageIndex--;

            return GetPage();

        }

        //上一页

        public List<T> Provious()

        {

            PageIndex--;

            if (this.PageIndex == 0)

                PageIndex++;

            return GetPage();

        }

        //第一页

        public List<T> Fist()

        {

            this.PageIndex = 1;

            return GetPage();

        }

        //最后一页

        public List<T> End()

        {

            this.PageIndex = this.AllPage;

            return GetPage();

        }

        /// <summary>

        /// 跳转到指定的页

        /// </summary>

        /// <param name="index"></param>

        /// <returns></returns>

        public List<T> GoTo(int index)

        {

            if (index <= 0)

                index = 1;

            if (index >= AllPage)

                index = AllPage;

            this.PageIndex = index;

            return GetPage();

        }

        /// <summary>

        /// 获得当前页

        /// </summary>

        /// <returns></returns>

        private List<T> GetPage()

        {

            return this.DataSource.Skip((PageIndex - 1) * EachCount).Take(EachCount).ToList();

        }

    }

}

后记

通过这样的一个类基本实现了大多数的情况下的分页操作(虽然可能性能不是很高),这里主要是运用了泛型的特性来帮助我们返回任意的对象集。只需要在UI中做一些简单的处理即可。