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@puyinc

Posted Wednesday, March 22, 2006 7:56 AM

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Last Login: Wednesday, July 14, 2010 12:32 AM
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Hi, recently I needed to pass some null value as parameteres to a DateTime field, I was using SQL Server 2k and C# VS 2003.

I tried using DBNull and others values but none fo them worked for me.

What I did at the end was to set a default value of null in the database field, and didn't pass the parameter when I didn't have it, of course it added a little bit of logic when building the query.

Is there anyway to pass null value in the param???

Kindest Regards,

@puy Inc

Post #267584

Doug S.

Posted Friday, November 09, 2007 7:22 AM

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To pass in a null to some stored procs (with older Vb6/ADO code) you can do this:

1) The VB code puts 1/1/1900 in the date and the proc converts it to null.

2) the proc code is shown below.
...
set @NullDate = convert(smalldatetime, '1/1/1900')

if @aTestTime =@NullDate set @aTestTime = null
...
Then your insert/update statement in the proc uses @aTestTime normally and this will put a null in the date field.

For our other code that generates insert and update statements just use null as you would in query analyzer.

Good luck

Doug

Post #420512

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