我的DateAdd函数在GridView中不起作用？

Question

I am facing problem with below query in gridview:

SELECT matno,
 MAX(SWITCH(deldate=#01/02/2014# ,ORDCASES )) AS ["1/2/2014"],
MAX(SWITCH(deldate=DateAdd("d", -1, #01/02/2014#),ORDCASES )) AS ["previous_day"]
FROM invorder
GROUP BY matno;

When I am running this query in access its working properly and my output is

matno   "1/2/2014"  "previous_day"
0       
1     125   
3      29   
4     551   
5                  641
6                  41
7                  511

But when I execute this in gridview in asp.net output is as follows

matno   "1/2/2014"  "previous_day"
0       
1     125   
3      29   
4     551   
5                  
6                 
7   

Kindly help me on this. Thanks.

Answer 1

In many cases the DateAdd() function is not available to queries that are run from outside of the Microsoft Access application itself. Instead of using

DateAdd("d", -1, #01/02/2014#)

try using this instead

CDate(CDbl(#01/02/2014#)-1)

or, better yet (because it is unambiguous)

CDate(CDbl(#2014-01-02#)-1)