AspNetPager分頁控件的使用(代碼生成器)

記得關於這個AspNetPager分頁控件我已經寫了兩次了，爲什麼又要寫一次呢？因爲我覺得這次是整理得比較詳細的了，而且，還結合了存儲過程與代碼生成器的，廢話不說了，就直接上代碼步驟吧。

1、 在數據庫中建立分頁存儲過程

-- =============================================
-- Author:		
-- Create date: 2009-07-22 12:41
-- Description:	分頁，用到了ROW_NUMBER()
-- =============================================
create PROCEDURE [dbo].[proc_SplitPage]
@tblName   varchar(255),       -- 表名
@strFields varchar(1000) = '*', -- 需要返回的列，默認*
@strOrder varchar(255)='',      -- 排序的字段名，必填
@strOrderType varchar(10)='ASC', -- 排序的方式,默認ASC
@PageSize   int = 10,          -- 頁尺寸,默認10
@PageIndex int = 1,           -- 頁碼,默認1
@strWhere varchar(1500) = '' -- 查詢條件 (注意: 不要加 where)
AS

declare @strSQL   varchar(5000)

if @strWhere !=''
set @strWhere=' where '+@strWhere

set @strSQL=
'SELECT * FROM ('+
	'SELECT ROW_NUMBER() OVER (ORDER BY '+@strOrder+' '+@strOrderType+') AS pos,'+@strFields+' '+
	'FROM '+@tblName+' '+@strWhere+
') AS sp WHERE pos BETWEEN '+str((@PageIndex-1)*@PageSize+1)+' AND '+str(@PageIndex*@PageSize)

exec (@strSQL)

2、 在代碼生成器生成的DAO代碼中加上獲取分頁數據的方法和計算記錄數的方法

        /// <summary>分頁獲取數據列表
        /// 
        /// </summary>
        /// <param name="fields">選擇的字段</param>
        /// <param name="order">排序字段</param>
        /// <param name="ordertype">排序類型</param>
        /// <param name="PageSize">頁大小</param>
        /// <param name="PageIndex">頁索引</param>
        /// <param name="strWhere">條件</param>
        /// <returns></returns>
        public DataSet GetList(string fields, string order, string ordertype, int PageSize, int PageIndex, string strWhere)
        {
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetStoredProcCommand("proc_SplitPage");
            db.AddInParameter(dbCommand, "tblName", DbType.AnsiString, "shop_news");
            db.AddInParameter(dbCommand, "@strFields", DbType.AnsiString, fields);
            db.AddInParameter(dbCommand, "PageSize", DbType.Int32, PageSize);
            db.AddInParameter(dbCommand, "PageIndex", DbType.Int32, PageIndex);
            db.AddInParameter(dbCommand, "@strOrder", DbType.String, order);
            db.AddInParameter(dbCommand, "@strOrderType", DbType.String, ordertype);
            db.AddInParameter(dbCommand, "strWhere", DbType.AnsiString, strWhere);
            return db.ExecuteDataSet(dbCommand);
        }

        /// <summary>計算記錄數
        /// 
        /// </summary>
        /// <param name="strWhere"></param>
        /// <returns></returns>
        public int CalcCount(string strWhere)
        {
            string sql = "select count(1) from shop_news";
            if (!string.IsNullOrEmpty(strWhere))
            {
                sql += " where" + strWhere;
            }
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetSqlStringCommand(sql);
            return int.Parse(db.ExecuteScalar(dbCommand).ToString());
        }

3、 在頁面中加入anp控件並設置顯示的樣式

 <webdiyer:AspNetPager ID="anp"   runat="server" FirstPageText="首頁" 
                        LastPageText="尾頁" NextPageText="下一頁" PrevPageText="上一頁" 
                        CustomInfoHTML="一共%RecordCount%條記錄，當前爲第%CurrentPageIndex%頁/共%PageCount%頁" 
                        onpagechanged="anp_PageChanged" ShowCustomInfoSection="Left">
                    </webdiyer:AspNetPager>

CSS的樣式

另附上CSS的代碼，覺得這個樣式不錯，紅色的
        .pages
        {
            color: #999;
            margin: 10px 200px;
        }
        .pages a, .pages .cpb
        {
            text-decoration: none;
            float: left;
            padding: 0 5px;
            border: 1px solid #ddd;
            background: #ffff;
            margin: 0 2px;
            font-size: 11px;
            color: #000;
        }
        .pages a:hover
        {
            background-color: #E61636;
            color: #fff;
            border: 1px solid #E61636;
            text-decoration: none;
        }
        .pages .cpb
        {
            font-weight: bold;
            color: #fff;
            background: #E61636;
            border: 1px solid #E61636;
        }

4、 在後臺的page_load事件中先設置anp控件的總記錄數，再綁定rep控件

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                anp.RecordCount = ndao.CalcCount(GetCond());
                BindRep();
            }
        }    

private string GetCond()
        {
            string cond = "";
            if (txt_key.Text.Trim().Length != 0)
            {
                string key = Niunan.Shop.Utility.Tool.GetSafeSQL(txt_key.Text.Trim());  //GetSafeSQL方法爲過濾一些非法字符，其實就是替換掉而已，見博文尾部
                cond = " linkname like '%" + key + "%' or url like  '%" + key + "%'";
            }
            return cond;
        }
 

  private void BindRep()
        {
            rep.DataSource = ndao.GetList("*", "createdate", "desc", anp.PageSize, anp.CurrentPageIndex, GetCond());
            rep.DataBind();
        }

5、 設置anp控件的分頁事件

  protected void anp_PageChanged(object sender, EventArgs e)
        {
            BindRep();
        }
    }

好了，就這五步曲了，相比之前那個不是用存儲過程來分頁的，這個應該是做到了真正意義上的真分頁了，因爲每次都會調用存儲過程來獲取數據。

附上過濾一些特殊字符的方法

 /// <summary>過y濾?SQL非¤?法¤¡§字Á?符¤?串ä?
        /// 
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string GetSafeSQL(string value)
        {
            if (string.IsNullOrEmpty(value))
                return string.Empty;
            value = Regex.Replace(value, @";", string.Empty);
            value = Regex.Replace(value, @"'", string.Empty);
            value = Regex.Replace(value, @"&", string.Empty);
            value = Regex.Replace(value, @"%20", string.Empty);
            value = Regex.Replace(value, @"--", string.Empty);
            value = Regex.Replace(value, @"==", string.Empty);
            value = Regex.Replace(value, @"<", string.Empty);
            value = Regex.Replace(value, @">", string.Empty);
            value = Regex.Replace(value, @"%", string.Empty);
            return value;
        }