Datableページング

using System;

using System.Collections.Generic;

using System.Web;

using System.Data;



/// <summary>

///Page  

/// </summary>

public class PageList

{

    public PageList()

    {

        //

        //TODO:  

        //

    }

    /// <summary>

    ///  DataTable , 1

    /// </summary>

    /// <param name="dt"></param>

    /// <param name="PageIndex"></param>

    /// <param name="PageSize"></param>

    /// <returns></returns>

    public static DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)

    {

        if (PageIndex == 0)

            return dt;

        DataTable newdt = dt.Copy();

        newdt.Clear();



        int rowbegin = (PageIndex - 1) * PageSize;

        int rowend = PageIndex * PageSize;



        if (rowbegin >= dt.Rows.Count)

            return newdt;



        if (rowend > dt.Rows.Count)

            rowend = dt.Rows.Count;

        for (int i = rowbegin; i <= rowend - 1; i++)

        {

            DataRow newdr = newdt.NewRow();

            DataRow dr = dt.Rows[i];

            foreach (DataColumn column in dt.Columns)

            {

                newdr[column.ColumnName] = dr[column.ColumnName];

            }

            newdt.Rows.Add(newdr);

        }



        return newdt;

    }



    /// <summary>

    ///  

    /// </summary>

    /// <param name="sumCount"> </param>

    /// <param name="pageSize"> </param>

    /// <returns></returns>

    public static int getPageCount(int sumCount, int pageSize)

    {

        int page = sumCount / pageSize;

        if (sumCount % pageSize > 0)

        {

            page = page + 1;

        }

        return page;

    }



}