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mapping to a varchar

Posted on 2004-10-27
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Last Modified: 2010-04-23
I have a parameter in a stored proc of type varchar. I create a sqlparameter to map to the varchar parameter. When do I have to specify the size of the parameter?
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Question by:philjh
    5 Comments
     
    LVL 15

    Expert Comment

    by:Timbo87
    ' assume cmd is a SqlCommand object.
    Dim p As New SqlParameter("@Parameter", SqlDbType.VarChar, 16)
    cmd.Parameters.Add(p)

    You can specify the length as the third parameter, in my example I used 16.
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    LVL 7

    Expert Comment

    by:natloz
    You shouldn't...just use something like:

    oComm.Parameters.Add(New SqlParameter("@varAdjustment", SqlDbType.varchar)).Value = "Blah"
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    Author Comment

    by:philjh
    Thanks for the response. I can see that I can use the length, yet natloz suggests that I shouldn't. Why? I am trying to understand if there is a rule about when I should and when I shouldn't.
    Thanks.
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    LVL 7

    Accepted Solution

    by:
    As far as I have seen the length has not made a difference in my applications. It more than likely just uses a smaller amount of memory when you leave it wide open....as most programs do.
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    Author Comment

    by:philjh
    Sorry for the delay. Got sidetracked...
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