线周报告

Question

我正在做一个每周报告，用户将为此报告选择两个日期。例如，用户想要查看两个日期之间的数据。我是在 Web 应用程序中进行的。

我写过这样的代码：

@"select distinct d1.machine as Machine,CASE  WHEN t.time BETWEEN '1900-01-01 7:00:00.000' 

AND '1900-01-01 14:59:59.999' THEN 'Shift1'   WHEN t.time BETWEEN '1900-01-01 

15:00:00.000' AND '1900-01-01 22:59:59.999' THEN 'Shift2' WHEN t.time BETWEEN '1900-01-01 

23:00:00.000' AND '1900-01-01 23:59:59.999' THEN 'Shift3' WHEN t.time BETWEEN '1900-01-01 

00:00:00.000' AND '1900-01-01 06:59:59.999' THEN 'Shift3' END as Shiftname,CASE  WHEN 

t.time BETWEEN '1900-01-01 7:00:00.000' AND '1900-01-01 14:59:59.999' THEN 'Operator1' 

  WHEN t.time BETWEEN '1900-01-01 15:00:00.000' AND '1900-01-01 22:59:59.999' 

THEN 'Operator2' WHEN t.time BETWEEN '1900-01-01 23:00:00.000' AND '1900-01-01 

23:59:59.999' THEN 'Operator3' WHEN t.time BETWEEN '1900-01-01 00:00:00.000' AND '1900-01-

01 06:59:59.999' THEN 'Operator3' END as OperatorName, Date=convert(varchar

(12),t.date,101),Time=convert(varchar(8),t.time,8),Temprature as 

Temperature,Pressure,Co2,Do2,pH,Speed,Flow from datalogging1 d1 inner join   temprature3 

t  on d1.date=t.date inner join pressure3 p on p.date=t.date and datepart(hour,t.time)

=datepart(hour,p.time) and datepart(minute,t.time)=datepart(minute,p.time) inner join co23 

c on c.date=t.date and datepart(hour,t.time)=datepart(hour,c.time) and datepart

(minute,t.time)=datepart(minute,c.time) inner join do23 d on d.date=t.date and datepart

(hour,t.time)=datepart(hour,d.time) and datepart(minute,t.time)=datepart(minute,d.time) 

inner join ph3 h on h.date=t.date and datepart(hour,t.time)=datepart(hour,h.time) and 

datepart(minute,t.time)=datepart(minute,h.time) inner join speed3 s on s.date=t.date and 

datepart(hour,t.time)=datepart(hour,s.time) and datepart(minute,t.time)=datepart

(minute,s.time) inner join flow3 f on f.date=t.date and datepart(hour,t.time)=datepart

(hour,f.time) and datepart(minute,t.time)=datepart(minute,f.time) where t.date 

between '"+txtfromdate+@"' and '"+txttodate+@"' and  line='"+ddlline.SelectedItem+@"' union 

select distinct d1.machine as Machine, CASE  WHEN t.time BETWEEN '1900-01-01 7:00:00.000'

 AND '1900-01-01 14:59:59.999' THEN 'Shift1'   WHEN t.time BETWEEN '1900-01-01 

15:00:00.000' AND '1900-01-01 22:59:59.999' THEN 'Shift2' WHEN t.time BETWEEN '1900-01-01

 23:00:00.000' AND '1900-01-01 23:59:59.999' THEN 'Shift3' WHEN t.time BETWEEN '1900-01-01

 00:00:00.000' AND '1900-01-01 6:59:59.999' THEN 'Shift3' END as Shiftname,CASE  WHEN 

t.time BETWEEN '1900-01-01 7:00:00.000' AND '1900-01-01 14:59:59.999' THEN 'Operator1'   

WHEN t.time BETWEEN '1900-01-01 15:00:00.000' AND '1900-01-01 22:59:59.999' 

THEN 'Operator2' WHEN t.time BETWEEN '1900-01-01 23:00:00.000' AND '1900-01-01 

23:59:59.999' THEN 'Operator3' WHEN t.time BETWEEN '1900-01-01 00:00:00.000' AND '1900-01-

01 6:59:59.999' THEN 'Operator3' END as OperatorName,Date=convert(varchar

(12),t.date,101),Time=convert(varchar(8),t.time,8),Temprature as 

Temperature,Pressure,Co2,Do2,pH,Speed,Flow from datalogging1 d1 inner join temprature3 t 

on d1.date=t.date inner join pressure3 p on p.date=t.date and datepart(hour,t.time)

=datepart(hour,p.time) and datepart(minute,t.time)=datepart(minute,p.time) inner join co23

 c on c.date=t.date and datepart(hour,t.time)=datepart(hour,c.time) and datepart

(minute,t.time)=datepart(minute,c.time) inner join do23 d on d.date=t.date and datepart

(hour,t.time)=datepart(hour,d.time) and datepart(minute,t.time)=datepart(minute,d.time) 

inner join ph3 h on h.date=t.date and datepart(hour,t.time)=datepart(hour,h.time) and 

datepart(minute,t.time)=datepart(minute,h.time) inner join speed3 s on s.date=t.date and 

datepart(hour,t.time)=datepart(hour,s.time) and datepart(minute,t.time)=datepart

(minute,s.time) inner join flow3 f on f.date=t.date and datepart(hour,t.time)=datepart

(hour,f.time) and datepart(minute,t.time)=datepart(minute,f.time) where t.date=dateadd

(day,1,'"+txttodate+@"') and line='"+ddlline.SelectedItem+@"' order by 

date,time,machine,shiftname,operatorname"

它在 SQL Server 中执行，但是当我将它包含在我的应用程序中时，它会显示类似的错误

将字符串转换为 smalldatetime 数据类型时转换失败。

谁能帮我解决这个问题？

Answer 1

不要对txtfromdate 和txttodate 使用字符串连接，而是在转换为DateTime 或SqlDateTime 后尝试将它们作为参数传递。您的问题几乎可以肯定是这些控件中的文本的格式是 SQL Server 无法解释的。