Question

我有以下代码来调用存储过程来填充Crystal Report。问题是最后一条记录是唯一返回的记录，并在整个报告中重复记录。它似乎覆盖了以前的记录，而不是返回与ID参数关联的每个记录。我错过了什么吗？

Dim idSQL As String = "SELECT DISTINCT ID FROM table"

drID = objdata.getOLEDBDR(MSCON1, idSQL)

            While drID.Read
                IDall = drID(0)

              'GET DATA******************************
                sqlstr = "SELECT columnname FROM tablename WHERE Id = '" & IDall & "'"

                Dim DAscp As New OleDbDataAdapter(sqlstr, MSCON1)
                dsQRpt.EnforceConstraints = False

                DAscp.Fill(dsQRpt, "tablename")


              'GET DATA FROM SP***********************
                Dim cmd As OleDbCommand = New OleDbCommand()
                cmd.Connection = MSCON
                cmd.CommandType = CommandType.StoredProcedure
                cmd.CommandText = "NAME_OF_SP"
                cmd.Parameters.Add("@month", OleDbType.VarChar, 10, ParameterDirection.Output).Value = QtrMonth
                cmd.Parameters.Add("@year", OleDbType.VarChar, 10, ParameterDirection.Output).Value = cboYear.SelectedValue
                cmd.Parameters.Add("@id", OleDbType.VarChar, 10, ParameterDirection.Output).Value = IDall

          Dim DAms As New OleDbDataAdapter()

            DAms.SelectCommand = cmd

            'DAms.Fill(dsQRpt)
            DAms.Fill(dsQRpt, "SP_NAME")


              'Populate Report*********************************************************************
                QPrpt.Load(Server.MapPath("rptQuarterly.rpt"))
                QPrpt.SetDataSource(dsQRpt)
                crQtrProgress.ReportSource = QPrpt
                QPrpt.SetParameterValue("vPTSID", PTSall)
                crQtrProgress.DataBind()

            End While

这是存储过程：

USE [DB]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[SP_NAME]
(
@month varchar(20),
@year varchar (4),
@id varchar (15)
)
AS

DECLARE @tmp table
(
ID nvarchar(10),
CategoryId nvarchar(5),
CategoryName nvarchar(50),
MDate datetime
)


DECLARE @i varchar(10)
DECLARE @sql varchar(1000)


SET @i = 1
DECLARE @j varchar(10)
SET @j = 1


WHILE (@i <=28)
BEGIN
DECLARE @MIDDATE nvarchar(25)
DECLARE @MIDID nvarchar(15)
SET @MIDDATE = 'mh.MID_'+@i+'_DATE'
SET @MIDID = 'mh.MID_'+@i


IF (((@i= 9) OR (@i =12)) AND (@j = 1))
        BEGIN
            --SET @j = 2
            SET @MIDDATE = 'mh.MID_'+@i+'a_DATE'
            SET @MIDID = 'mh.MID_'+@i+'a'
        END  

 IF (((@i= 9) OR (@i = 12)) AND (@j = 2))
        BEGIN

            SET @MIDDATE = 'mh.MID_'+@i+'b_DATE'
            SET @MIDID = 'mh.MID_'+@i+'b'
       END 


SET @sql ='SELECT mh.ID, mc.CategoryId, mc.CategoryName, '+ @MIDDATE +'
FROM MHistory As mh, MCategories As mc WHERE mc.CategoryId = SUBSTRING('''+
@MIDID +''',8,10) AND mh.ID = ''' + @id + ''' AND mh.Hist_Yr = ' + @year + '
AND mh.Hist_Month = ''' + @month + ''' ORDER BY mh.ID'
INSERT INTO @tmp
EXEC (@sql)

IF (((@i= 9) OR (@i=12)) AND (@j = 1))
                  BEGIN
                  IF @i= 9 SET @i = 9
                  IF @i =12 SET @i = 12
                  SET @j = 2
                  END 
  ELSE
                  BEGIN
                    SET @i = @i + 1
                    SET @j = 1
                  END 
 END

----SET @i = @i + 1
SELECT 
ID AS ID,
CategoryId AS CategoryId,
CategoryName AS CategoryName,
MDate AS MDate

from @tmp

Answer 1

对于报表数据源的查询似乎总是返回单个记录，因为您的数据源查询正在Id上进行过滤，我认为这是tablename的主键。

'GET DATA******************************
            sqlstr = "SELECT columnname FROM tablename WHERE Id = '" & IDall & "'"

            Dim DAscp As New OleDbDataAdapter(sqlstr, MSCON1)
            dsQRpt.EnforceConstraints = False

            DAscp.Fill(dsQRpt, "tablename")

另外，我建议您验证报告是否使用正确的参数调用存储过程。您可以通过在存储过程中的最后一个SELECT之前填充自定义表来执行此操作。在此自定义表中，您可以记录参数的值以及您认为与该情况相关的任何其他内容。

您可以使用以下查询来执行此日志记录。

创建用于记录的自定义表

CREATE TABLE CustomLoggingTable (Parameters varchar(max), RunDate DateTime);
CREATE TABLE CustomResultsTable (ID int, CategoryId int, CategoryName varchar(500),
                                                                         MDate DateTime);

将下面的查询添加为程序的最后一部分（此代码中的最后一个SELECT是您拥有的原始SELECT，您不应该更改它，而只是将其他部分放在它之前）

记录您的存储过程

--log procedure parameters
INSERT INTO CustomLoggingTable ( Parameters, RunDate) 
select '@month = ' + isnull(@month,'')  + ', @year = ' + isnull(@year,'') 
                                       + ', @id = ' + isnull( @id,''), getdate() ;

--log result set being returned into a custom table
DELETE from CustomResultsTable;
INSERT into CustomResultsTable (ID, CategoryId, CategoryName, MDate)
SELECT 
ID AS ID,
CategoryId AS CategoryId,
CategoryName AS CategoryName,
MDate AS MDate
from @tmp

--this is your last statement in procedure for returning final result set
SELECT 
ID AS ID,
CategoryId AS CategoryId,
CategoryName AS CategoryName,
MDate AS MDate
from @tmp

完成上述设置后，您可以准确查看调用存储过程时发生的情况。每次返回最新结果集时都会刷新CustomResultsTable，而CustomLoggingTable将为每次运行过程添加新记录。

用于Crystal Reports的存储过程会覆盖以前的记录

1 个答案: