DataTable分页实例，

DateTable分页通用类：

   public static class Page {        /// <summary>        /// DataTable分页        /// </summary>        /// <param name="dt">DataTable</param>        /// <param name="PageIndex">页索引,注意：从1开始</param>        /// <param name="PageSize">每页大小</param>        /// <returns>分好页的DataTable数据</returns>              第1页        每页10条        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>        /// 返回分页的页数        /// </summary>        /// <param name="count">总条数</param>        /// <param name="pageye">每页显示多少条</param>        /// <returns>如果 结尾为0：则返回1</returns>        public static int PageCount(int count, int pageye)        {            int page = 0;            int sesepage = pageye;            if (count % sesepage == 0) { page = count / sesepage; }            else { page = (count / sesepage) + 1; }            if (page == 0) { page += 1; }            return page;        }    }

具体的使用：

 1. 创建分页需要的属性以及类：

 DataTable dbtb = new DataTable();        int pageSize = 20;     //每页显示行数        int nMax = 0;         //总记录数        int pageCount = 0;    //页数＝总记录数/每页显示行数        int pageCurrent = 1;   //当前页号

2.初始化加载>页面加载事件：

dbtb.Columns.Add("序号", typeof(int));            dbtb.Columns.Add("操作", typeof(string));            dbtb.Columns.Add("用户", typeof(string));            dbtb.Columns.Add("昵称", typeof(string));            dbtb.Columns.Add("操作时间", typeof(string));            adduserFromDB("");            dgv_Log.Rows.Clear();            LodDate(dbtb, 1, pageSize);            this.txtCurrentPage.Text = "1";

3：调用的方法：

   public void adduserFromDB(string sqlParam)        {            dbtb.Rows.Clear();            dgv_Log.Rows.Clear();            System.Collections.Generic.List<Entity.LogItem> loglist = Core.User.GetLogList(sqlParam);            foreach (Entity.LogItem log in loglist)            {                int index = this.dgv_Log.Rows.Add();                this.dgv_Log.Rows[index].Cells["ID"].Value = log.id;                this.dgv_Log.Rows[index].Cells["data"].Value = log.Data;                this.dgv_Log.Rows[index].Cells["UserCode"].Value = log.UserCode;                this.dgv_Log.Rows[index].Cells["UserName"].Value = log.UserName;                this.dgv_Log.Rows[index].Cells["Datetime"].Value = log.Datetime;                DataRow newRow = dbtb.NewRow();                newRow["序号"] = log.id;                newRow["操作"] = log.Data;                newRow["用户"] = log.UserCode;                newRow["昵称"] = log.UserName;                newRow["操作时间"] = log.Datetime;                dbtb.Rows.Add(newRow);            }            LodDate(dbtb, 1, pageSize);        }        //  加载         public void LodDate(DataTable dbt, int PageIndex, int PageSize)        {            //pageSize = 10;     //每页显示行数            nMax = dbt.Rows.Count;     //总记录数            pageCount = Core.Page.PageCount(nMax,pageSize);    //页数＝总记录数/每页显示行数            pageCurrent = PageIndex;   //当前页号            //nCurrent = 0;      //当前记录行            DataTable dt = Core.Page.GetPagedTable(dbt, PageIndex, PageSize);            this.labelX3.Text = dbt.Rows.Count.ToString();            this.labelX4.Text = PageSize.ToString();            this.lblPageCount.Text = (Core.Page.PageCount(dbt.Rows.Count, PageSize)).ToString();            this.txtCurrentPage.Text = PageIndex.ToString();            //this.lblPageCount.Text = (Convert.ToInt32(dbt.Rows.Count) / PageSize).ToString();            this.dgv_Log.Rows.Clear();            //for (int i = 0; i < dt.Columns.Count; i++)            //{                for (int j = 0; j < dt.Rows.Count; j++)                {                    //temp = dt.Rows[j][i].ToString();//具体情况具体设置                    int index = this.dgv_Log.Rows.Add();                    this.dgv_Log.Rows[index].Cells["ID"].Value = dt.Rows[j][0].ToString();                    this.dgv_Log.Rows[index].Cells["data"].Value = dt.Rows[j][1].ToString();                    this.dgv_Log.Rows[index].Cells["UserCode"].Value = dt.Rows[j][2].ToString();                    this.dgv_Log.Rows[index].Cells["UserName"].Value = dt.Rows[j][3].ToString();                    this.dgv_Log.Rows[index].Cells["Datetime"].Value = dt.Rows[j][4].ToString();                }                       //}                   }

4：第一页

 dgv_Log.Rows.Clear();            LodDate(dbtb, 1, pageSize);            this.txtCurrentPage.Text = "1";

5：最后一页

 dgv_Log.Rows.Clear();            LodDate(dbtb, pageCount, pageSize);            this.txtCurrentPage.Text = pageCount.ToString();

6：上一页

if (pageCurrent >1)            {                pageCurrent--;                LodDate(dbtb, pageCurrent, pageSize);                this.txtCurrentPage.Text = pageCurrent.ToString();            }else             {                MessageBox.Show("已经是第一页，请点击“下一页”查看！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);                return;            }          

7：下一页

  if (pageCount > pageCurrent)            {                pageCurrent++;                LodDate(dbtb, pageCurrent, pageSize);                this.txtCurrentPage.Text = pageCurrent.ToString();            }            else            {                MessageBox.Show("已经是最后一页，请点击“上一页”查看！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);            }

8：删除的时候需要从Datatable删除查找到的行( 删除的时候需要更新状态)

 //从DataTable中去掉指定的行                        DataRow[] foundRow = dbtb.Select("序号=" + id);                        foreach (DataRow row in foundRow)                        {                            dbtb.Rows.Remove(row);                        }

 //更新底部状态

 this.labelX3.Text = dbtb.Rows.Count.ToString();                    this.labelX4.Text = pageSize.ToString();                    this.lblPageCount.Text = (Core.Page.PageCount(dbtb.Rows.Count, pageSize)).ToString();                    //this.txtCurrentPage.Text = PageIndex.ToString();