AspNetPager高效分頁

如下是首頁添加了aspnetpager的代碼：

<webdiyer:AspNetPager ID="PagerUserService" runat="server" AlwaysShow="True" 
                            CustomInfoHTML="共[%RecordCount%]條，[%CurrentPageIndex%] / [%PageCount%]頁"
                            FirstPageText="[ 首頁 ]" LastPageText="[ 末頁 ]" NextPageText="[ 下一頁 ]" NumericButtonCount="15"
                            PageSize="50" PrevPageText="[ 上一頁 ]" CustomInfoTextAlign="Left" ShowCustomInfoSection="Left"
                            Direction="LeftToRight" Width="100%" InvalidPageIndexErrorMessage="你確定你輸入的是數字？！"
                            PageIndexOutOfRangeErrorMessage="沒這麼多頁o(∩_∩)o 哈哈.." SubmitButtonText="轉到" CssClass="pageStyle"
                            HorizontalAlign="Right" OnPageChanged="PagerUserService_PageChanged" CustomInfoSectionWidth="20%">
                        </webdiyer:AspNetPager>

後臺通過調用存儲過程，對repeater控件進行數據綁定，並用aspnetpager進行分頁，如下函數LoadData（）便是對repeater控件和aspnetpager控件的數據綁定：

 private void LoadData()
{
//實例化用來作爲參數對象的DataTogther類
            Model.DataTogther ModelTo = new CRM.Model.DataTogther();
            ModelTo.TableName = " T_UserInfo ";           //指定表名
            ModelTo.PageSize = PagerUserService.PageSize; //指定分頁尺寸
            ModelTo.PageIndex = PagerUserService.CurrentPageIndex; //當前頁尺寸
            ModelTo.PrimaryKey = " T_UserID ";            //主鍵ID號
            ModelTo.SortType = 3;                         //排序類型
            //排序中一定要包含主鍵 否則報錯“無法找到表0”
            ModelTo.Order = " T_DateTime DESC,T_UserID DESC ";
            ModelTo.FieldList = " T_UserID,T_Person,T_CompanyName,T_DateTime," +
                                "T_UserType,T_UserLeave,T_UserFrom,T_UserState,T_NowService ";
            ModelTo.Where = GetWhere();                   //獲取查詢條件
            ModelTo.RecorderCount = 0;                    //初始化記錄條數
            int RecordCount=0;
            //指定Repeater的數據源
            RpUserService.DataSource = BLL.SysBase.GetDataList(ModelTo, out RecordCount);
            RpUserService.DataBind();                   //執行數據綁定
            PagerUserService.RecordCount = RecordCount; //指定AspNetPager的記錄行數
}

該函數裏面的BLL.SysBase.GetDataList方法便是調用了存儲過程，進行數據綁定和分頁效果。該存儲過程如下：

ALTER PROCEDURE [dbo].[DataPageList]
@TableName VARCHAR(200), --表名
@FieldList VARCHAR(2000), --顯示列名，如果是全部字段則爲*
@PrimaryKey VARCHAR(100), --單一主鍵或唯一值鍵
@Where VARCHAR(1000), --查詢條件不含'where'字符，如id>10 and len(userid)>9
@Order VARCHAR(100), --排序不含'order by'字符，如id asc,userid desc，必須指定asc或desc --注意當@SortType=3時生效，記住一定要在最後加上主鍵
@SortType INT, --排序規則 1:正序asc 2:倒序desc 3:多列排序方法
@RecorderCount INT, --記錄總數 0:會返回總記錄
@PageSize INT, --每頁輸出的記錄數
@PageIndex INT, --當前頁數
@TotalCount INT OUTPUT --記返回總記錄
AS
IF ISNULL(@TotalCount,'') = ''
SET @TotalCount = 0
SET @Order = RTRIM(LTRIM(@Order))
SET @PrimaryKey = RTRIM(LTRIM(@PrimaryKey))
SET @FieldList = REPLACE(RTRIM(LTRIM(@FieldList)),' ','')
WHILE CHARINDEX(', ',@Order) > 0 OR CHARINDEX(' ,',@Order) > 0
BEGIN
SET @Order = REPLACE(@Order,', ',',')
SET @Order = REPLACE(@Order,' ,',',')
END
IF ISNULL(@TableName,'') = '' OR ISNULL(@FieldList,'') = ''OR ISNULL(@PrimaryKey,'') = ''
OR @SortType < 1 OR @SortType >3 OR @RecorderCount < 0 OR @PageSize < 0 OR @PageIndex < 0
BEGIN
RETURN
END
IF @SortType = 3
BEGIN
IF (UPPER(RIGHT(@Order,4))!=' ASC' AND UPPER(RIGHT(@Order,5))!=' DESC')
BEGIN
RETURN
END
END
DECLARE @new_where1 VARCHAR(1000)
DECLARE @new_where2 VARCHAR(1000)
DECLARE @new_order1 VARCHAR(1000)
DECLARE @new_order2 VARCHAR(1000)
DECLARE @new_order3 VARCHAR(1000)
DECLARE @Sql VARCHAR(8000)
DECLARE @SqlCount NVARCHAR(4000)
IF ISNULL(@where,'') = ''
BEGIN
SET @new_where1 = ' '
SET @new_where2 = ' WHERE '
END
ELSE
BEGIN
SET @new_where1 = ' WHERE ' + @where
SET @new_where2 = ' WHERE ' + @where + ' AND '
END
IF ISNULL(@order,'') = '' OR @SortType = 1 OR @SortType = 2
BEGIN
IF @SortType = 1
BEGIN
SET @new_order1 = ' ORDER BY ' + @PrimaryKey + ' ASC'
SET @new_order2 = ' ORDER BY ' + @PrimaryKey + ' DESC'
END
IF @SortType = 2
BEGIN
SET @new_order1 = ' ORDER BY ' + @PrimaryKey + ' DESC'
SET @new_order2 = ' ORDER BY ' + @PrimaryKey + ' ASC'
END
END
ELSE
BEGIN
SET @new_order1 = ' ORDER BY ' + @Order
END
IF @SortType = 3 AND CHARINDEX(','+@PrimaryKey+' ',','+@Order)>0
BEGIN
SET @new_order1 = ' ORDER BY ' + @Order
SET @new_order2 = @Order + ','
SET @new_order2 = REPLACE(REPLACE(@new_order2,'ASC,','{ASC},'),'DESC,','{DESC},')
SET @new_order2 = REPLACE(REPLACE(@new_order2,'{ASC},','DESC,'),'{DESC},','ASC,')
SET @new_order2 = ' ORDER BY ' + SUBSTRING(@new_order2,1,LEN(@new_order2)-1)
IF @FieldList <> '*'
BEGIN
SET @new_order3 = REPLACE(REPLACE(@Order + ',','ASC,',','),'DESC,',',')
SET @FieldList = ',' + @FieldList
WHILE CHARINDEX(',',@new_order3)>0
BEGIN
IF CHARINDEX(SUBSTRING(','+@new_order3,1,CHARINDEX(',',@new_order3)),','+@FieldList+',')>0
BEGIN
SET @FieldList =@FieldList + ',' + SUBSTRING(@new_order3,1,CHARINDEX(',',@new_order3))
END
SET @new_order3 =SUBSTRING(@new_order3,CHARINDEX(',',@new_order3)+1,LEN(@new_order3))
END
SET @FieldList = SUBSTRING(@FieldList,2,LEN(@FieldList))
END
END
SET @SqlCount = 'SELECT @TotalCount=COUNT(*) FROM ' + @TableName + @new_where1
IF @RecorderCount = 0
BEGIN
EXEC SP_EXECUTESQL @SqlCount,N'@TotalCount INT OUTPUT', @TotalCount OUTPUT
END
ELSE
BEGIN
SELECT @TotalCount = @RecorderCount
END
IF @PageIndex > CEILING((@TotalCount+0.0)/@PageSize)
BEGIN
SET @PageIndex = CEILING((@TotalCount+0.0)/@PageSize)
END
IF @PageIndex = 1 OR @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize)
BEGIN
IF @PageIndex = 1 --返回第一頁數據
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ' + @TableName + @new_where1 + @new_order1
END
IF @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize) --返回最後一頁數據
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM ('+ 'SELECT TOP ' + STR(ABS(@PageSize*@PageIndex-@TotalCount-@PageSize))+ ' ' + @FieldList +
' FROM '+ @TableName + @new_where1 + @new_order2 + ' ) AS TMP '+ @new_order1
END
END
ELSE
BEGIN
IF @SortType = 1 --僅主鍵正序排序
BEGIN
IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向檢索
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM '+ @TableName + @new_where2 + @PrimaryKey + ' > '+ '(SELECT MAX(' + @PrimaryKey + ')
FROM (SELECT TOP '+ STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey+
' FROM ' + @TableName + @new_where1 + @new_order1 +' ) AS TMP) '+ @new_order1
END
ELSE --反向檢索
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM ('+ 'SELECT TOP ' + STR(@PageSize) + ' '+ @FieldList +
' FROM '+ @TableName + @new_where2 + @PrimaryKey + ' < '+ '(SELECT MIN(' + @PrimaryKey + ')
FROM (SELECT TOP '+ STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey +
' FROM ' + @TableName + @new_where1 + @new_order2 +' ) AS TMP)
'+ @new_order2+ ' ) AS TMP ' + @new_order1
END
END
IF @SortType = 2 --僅主鍵反序排序
BEGIN
IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向檢索
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM '+ @TableName + @new_where2 + @PrimaryKey + ' < '+ '(SELECT MIN(' + @PrimaryKey + ')
FROM (SELECT TOP '+ STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey +
' FROM '+ @TableName+ @new_where1 + @new_order1 + ') AS TMP) '+ @new_order1
END
ELSE --反向檢索
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM ('+ 'SELECT TOP ' + STR(@PageSize) + ' '+ @FieldList +
' FROM '+ @TableName + @new_where2 + @PrimaryKey + ' > '+ '(SELECT MAX(' + @PrimaryKey + ')
FROM (SELECT TOP '+ STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey+
' FROM ' + @TableName+ @new_where1 + @new_order2 +' ) AS TMP) '+ @new_order2+ ' ) AS TMP ' + @new_order1
END
END
IF @SortType = 3 --多列排序，必須包含主鍵，且放置最後，否則不處理
BEGIN
IF CHARINDEX(',' + @PrimaryKey + ' ',',' + @Order) = 0
BEGIN PRINT('ERR_02') RETURN END
IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向檢索
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + '
FROM ( '+ 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM ( '+ ' SELECT TOP ' + STR(@PageSize*@PageIndex) + ' ' + @FieldList+
' FROM ' + @TableName + @new_where1 + @new_order1 + ' ) AS TMP '+ @new_order2 + ' ) AS TMP ' + @new_order1
END
ELSE --反向檢索
BEGIN
SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM ( '+ 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList +
' FROM ( '+ ' SELECT TOP ' + STR(@TotalCount-@PageSize*@PageIndex+@PageSize) + ' ' + @FieldList+
' FROM ' + @TableName + @new_where1 + @new_order2 + ' ) AS TMP '+ @new_order1 + ' ) AS TMP ' + @new_order1
END
END
END
EXEC(@Sql)

效果如下如所示：