高效分页存储过程

--execute sp_Pager 'DeliveryOperator','*',10,2,10,100,'DO_ID',1,'','DO_ID',0;

CREATE PROCEDURE sp_Pager
(
@tableName NVARCHAR(200),      ----要显示的表或多个表的连接
@fieldNames NVARCHAR(200)='*', ----要显示的字段列表
@pageSize INT = 10,            ----每页显示的记录个数
@page INT = 10,                ----要显示那一页的记录
@pageCount INT = 1 output,     ----查询结果分页后的总页数
@counts INT = 1 output,        ----查询到的总记录数
@fieldSort NVARCHAR(200)= null,----排序字段列表或条件
@sort BIT = 1,                 ----排序方法，0为升序，1为降序--程序传参如：' SortA Asc,SortB Desc,SortC ')
@condition NVARCHAR(200)= null,----查询条件,不需WHERE
@keyID NVARCHAR(100),          ----主表的主键
@distinct BIT = 0              ----是否添加查询字段的 DISTINCT 默认0不添加/1添加
)
AS

SET NOCOUNT ON
Declare @SELECT NVARCHAR(1000)    ----存放动态生成的SQL语句
Declare @strCounts NVARCHAR(1000) ----存放取得查询结果总数的查询语句
Declare @strID  NVARCHAR(1000)    ----存放取得查询开头或结尾ID的查询语句

Declare @sortTypeA NVARCHAR(10)   ----数据排序规则A
Declare @SortTypeB NVARCHAR(10)   ----数据排序规则B

Declare @distSelect NVARCHAR(50)  ----对含有DISTINCT的查询进行SQL构造
Declare @distCounts NVARCHAR(50)  ----对含有DISTINCT的总数查询进行SQL构造

DECLARE @SortfieldA NVARCHAR(50)  ----对含有是否还有排序字段时的排序方式组合A
DECLARE @SortfieldB NVARCHAR(50)  ----对含有是否还有排序字段时的排序方式组合B

IF @distinct = 0
 BEGIN
  SET @distSelect = 'SELECT '
  SET @distCounts = ' COUNT(*)'
 END
ELSE
 BEGIN
  SET @distSelect = 'SELECT distinct '
  SET @distCounts = ' COUNT(DISTINCT '+@keyID+')'
 END

IF @sort=0
 BEGIN
  SET @SortTypeB=' ASC '
  SET @sortTypeA=' DESC '
 END
ELSE
 BEGIN
  SET @SortTypeB=' DESC '
  SET @sortTypeA=' ASC '
 END

IF @fieldSort IS NOT NULL AND @fieldSort<>'' --排序字段不为空时
 BEGIN
  SET @SortfieldB=' order by '+ @fieldSort +' '+ @SortTypeB
  SET @SortfieldA=' order by '+ @fieldSort +' '+ @SortTypeA
 END
ELSE
 BEGIN
  SET @SortfieldB=''
  SET @SortfieldA=''
 END

--------生成查询语句--------
--此处@strCounts为取得查询结果数量的语句
IF @condition is null or @condition=''     --没有设置显示条件
 BEGIN
  SET @SELECT =  @fieldNames + ' FROM ' + @tableName
  SET @strCounts = @distSelect+' @counts='+@distCounts+' FROM '+@tableName
  SET @strID = ' FROM ' + @tableName
 END
ELSE
 BEGIN
  SET @SELECT = + @fieldNames + 'FROM ' + @tableName + ' WHERE  ' + @condition
  SET @strCounts = @distSelect+' @counts='+@distCounts+' FROM '+@tableName + ' WHERE ' + @condition
  SET @strID = ' FROM ' + @tableName + ' WHERE  ' + @condition
 END

----取得查询结果总数量-----
exec sp_executesql @strCounts,N'@counts INT out ',@counts out
DECLARE @tmpCounts INT

IF @counts = 0
    SET @tmpCounts = 1
ELSE
    SET @tmpCounts = @counts

    --取得分页总数
    SET @pageCount=(@tmpCounts+@pageSize-1)/@pageSize

    --/**当前页大于总页数 取最后一页**/
    IF @page>@pageCount
        SET @page=@pageCount

    --/*-----数据分页2分处理-------*/
    DECLARE @pageIndex INT --总数/页大小
    DECLARE @lastcount INT --总数%页大小

    SET @pageIndex = @tmpCounts/@pageSize
    SET @lastcount = @tmpCounts%@pageSize
    IF @lastcount > 0
        SET @pageIndex = @pageIndex + 1
    ELSE
        SET @lastcount = @pageSize

    --显示分页
    IF @condition is null or @condition=''     --没有设置显示条件
    BEGIN
        IF @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
            BEGIN
                SET @strCounts=@distSelect+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames+' FROM '+@tableName + ' WHERE '+@keyID+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @keyID +' FROM '+@tableName + @SortfieldB +')' + @SortfieldB
            END
        ELSE
            BEGIN
            SET @page = @pageIndex-@page+1 --后半部分数据处理
                IF @page <= 1 --最后一页数据显示
                    SET @strCounts=@distSelect+' * FROM ('+@distSelect+' TOP '+ CAST(@lastcount as VARCHAR(4))+' '+ @fieldNames+' FROM '+@tableName + @SortfieldA+') AS TempTB '+@SortfieldB
                ELSE               
                    SET @strCounts=@distSelect+' * FROM ('+@distSelect+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames+' FROM '+@tableName + ' WHERE '+@keyID+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @keyID +' FROM '+@tableName + @SortfieldA+')' + @SortfieldA+') AS TempTB '+@SortfieldB
            END
    END

    ELSE --有查询条件
    BEGIN
        IF @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
        BEGIN
                SET @strCounts=@distSelect+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames +' FROM  '+@tableName + ' WHERE '+@keyID+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @keyID +' FROM '+@tableName + ' Where ' + @condition + @SortfieldB+')'+' AND ' + @condition + @SortfieldB                
        END
        ELSE
        BEGIN
            SET @page = @pageIndex-@page+1 --后半部分数据处理
            IF @page <= 1 --最后一页数据显示
                    SET @strCounts=@distSelect+' * FROM ('+@distSelect+' TOP '+ CAST(@lastcount as VARCHAR(4))+' '+ @fieldNames+' FROM '+@tableName + ' WHERE  '+ @condition +@SortfieldA+') AS TempTB '+@SortfieldB
            ELSE
                    SET @strCounts=@distSelect+' * FROM ('+@distSelect+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames+' FROM '+@tableName + ' WHERE '+@keyID+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' ' + @keyID +' FROM '+@tableName +' WHERE  '+ @condition +@SortfieldA+')' +' AND '+ @condition +@SortfieldA+') AS TempTB ' + @SortfieldB
        END   
    END

------返回查询结果-----
exec sp_executesql @strCounts
SET NOCOUNT OFF

 

 

//C#中调用

public static string ConnString = System.Configuration.ConfigurationManager.AppSettings["ConnString"].ToString();
        //Added by Sheetal
        public static DataTable GetDataTableByProcedure(int pageSize, int pageCurrent, string tblName, string fldNames, string fldOrderName, bool orderType, string whereStr, string keyID, bool distinct, out int countRows)
        {
            DataSet ds = new DataSet();
            countRows = 0;
          
            SqlConnection conn = new SqlConnection(ConnString);
            try
            {
                conn.Open();
                //设置参数
                SqlCommand cmd = new SqlCommand("Sp_Pager", conn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.Clear();

                cmd.Parameters.Add(new SqlParameter("@tableName", SqlDbType.VarChar, 255));
                cmd.Parameters.Add(new SqlParameter("@fieldNames", SqlDbType.VarChar, 1000));
                cmd.Parameters.Add(new SqlParameter("@pageSize", SqlDbType.Int, 4));
                cmd.Parameters.Add(new SqlParameter("@page", SqlDbType.Int, 4));
                cmd.Parameters.Add(new SqlParameter("@pageCount", SqlDbType.Int, 8));
                cmd.Parameters.Add(new SqlParameter("@counts", SqlDbType.Int, 8));
                cmd.Parameters.Add(new SqlParameter("@fieldSort", SqlDbType.VarChar, 255));
                cmd.Parameters.Add(new SqlParameter("@sort", SqlDbType.Bit, 1));
                cmd.Parameters.Add(new SqlParameter("@condition", SqlDbType.VarChar, 1500));
                cmd.Parameters.Add(new SqlParameter("@keyID", SqlDbType.VarChar, 100));
                cmd.Parameters.Add(new SqlParameter("@distinct", SqlDbType.Bit, 1));
               

                cmd.Parameters["@tableName"].Value = tblName;
                cmd.Parameters["@fieldNames"].Value = fldNames;
                cmd.Parameters["@pageSize"].Value = pageSize;
                cmd.Parameters["@page"].Value = pageCurrent;
                cmd.Parameters["@pageCount"].Direction = ParameterDirection.Output;
                cmd.Parameters["@counts"].Direction = ParameterDirection.Output;
                cmd.Parameters["@fieldSort"].Value = fldOrderName;
                cmd.Parameters["@sort"].Value = orderType;
                cmd.Parameters["@condition"].Value = whereStr;
                cmd.Parameters["@keyID"].Value = keyID;
                cmd.Parameters["@distinct"].Value = distinct;
             
                //设置参数结束
                SqlDataAdapter dp = new SqlDataAdapter();
                dp.SelectCommand = cmd;

                //执行
                dp.Fill(ds);
                //记录总数
               
                countRows = int.Parse(cmd.Parameters["@counts"].Value.ToString().Trim());
                //pageCount = int.Parse(cmd.Parameters["@pageCount"].Value.ToString().Trim());
                //
                // return ds.Tables[0];
            }
            catch (Exception ex)
            {
                // throw (ex);
                ds = null;
            }
            finally
            {
                conn.Close();
            }
            if (ds != null)
            {
                return ds.Tables[0];
            }
            else
            {
                return null;
            }
        }