小编Ros*_*han的帖子

我有一个存储过程select * from book table,使用子查询我的查询是

USE [library]
GO

/****** Object:  StoredProcedure [dbo].[report_r_and_l]    Script Date: 04/17/2013 12:42:39 ******/

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

ALTER procedure [dbo].[report_r_and_l]
@fdate date,
@tdate date,
@key varchar(1)
as

if(@key='r')

    select * 
    from dbo.books 
    where isbn =(select isbn from dbo.lending where (act between @fdate and @tdate) and (stat ='close'))

else if(@key='l')

    select * 
    from dbo.books 
    where isbn =(select isbn from dbo.lending where lended_date between @fdate and @tdate)

我知道子查询返回多个查询到主查询,但我不知道如何避免这个错误,任何人都可以帮助我吗？

朋友们,我用c#开发了一个简单的应用程序,它有两个rdlc报告

我使用下面的代码将数据源绑定到报表查看器

 this.reportViewer1.LocalReport.ReportPath = @"C:\Documents and Settings\Administrator\My Documents\Visual Studio 2008\Projects\reports\reports\Report1.rdlc";
 reportViewer1.LocalReport.DataSources.Clear();
 reportViewer1.LocalReport.DataSources.Add(new ReportDataSource("customer", dt.Tables[0])) ;
 this.reportViewer1.RefreshReport();

但是当报告生成时,它是空的报告没有数据显示,任何意见???