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Append field to database during run-time

Posted on 2001-06-20
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Last Modified: 2010-05-02
I am very new to VB and I am trying to append a new field to a database with the name of the field being a string the user enters in (boolean-type field) and I am getting stuck.  I am trying not to use SQL statements or adodb connections because I don't really understand them. I tried:

 MattressType.Recordset.Fields.Append txtHardness.Text

but it gives me a run-time error of "type mismatch" and highlights the "txtHardness.Text" which is a string but I think I'm supposed to have an object there. Please help me as I am very confused (as you can probably tell).
Thanks!
~Sarah
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Question by:snaegs99
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5 Comments
 
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Expert Comment

by:rkot2000
ID: 6211389
Append does not append a field to the database, it allows to build a dynamic recordset.
If you want to change/alter a table you need to use tsql ? for sqlserver or sqlplus for oracle.
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Accepted Solution

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jrspano earned 50 total points
ID: 6211455
for sql server 7 and 2000

alter table tablename ADD columnname FLOAT NOT NULL

this adds a column named columnname that has float for type and doesn't accept nulls.
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Expert Comment

by:jrspano
ID: 6211458
you really should learn to understand ado.  there is only so much you can do without them.
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Expert Comment

by:Hornet241
ID: 6211766
If you want to append a field you must use the TableDef object and append a field object, using ADO and SQL would be much easier and more worth your while to learn for many other reasons.

But here is a sample I used to use with VB3, DAO and Access 2.0

    Dim db as Database
    Dim tb As New TableDef
    ReDim fd(0 To 6) As New Field

    Set db = CreateDatabase(DBName$, DB_LANG_GENERAL)
    tb.Name = "language"

    fd(0).Name = "text"
    fd(0).Type = db_text
    fd(0).Size = 255

    tb.fields.append fd(0)

    db.tabledefs.append tb

hope this helps
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Expert Comment

by:DanRollins
ID: 7139597
Hi snaegs99@devx,
It appears that you have forgotten this question. I will ask Community Support to close it unless you finalize it within 7 days. I will suggest to:

    Accept jrspano's comment(s) as an answer.

snaegs99@devx, if you think your question was not answered at all or if you need help, you can simply post a new comment here.  Community Support moderators will follow up.

EXPERTS: If you disagree with that recommendation, please post an explanatory comment.
==========
DanRollins -- EE database cleanup volunteer
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