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vb.net get insert id

Posted on 2006-07-20
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Last Modified: 2008-01-09
I am using an OleDbConnection.
I would like to get back the auto incremented id from the insert command.

        executeSQL("insert into tests (description, offset) values('" & testName & "'," & offsetValue & ")")

    Public Function executeSQL(ByVal sqlstring$)
        Dim myCommand As New SqlCommand(sqlstring)
        Dim retValue%

        Dim myConnection As New OleDb.OleDbConnection(connectionString)

        myConnection.Open()

        Dim dataCommand As New OleDb.OleDbCommand(sqlstring, myConnection)

        retValue = dataCommand.ExecuteNonQuery()

        myConnection.Close()

    End Function

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Question by:jackjohnson44
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7 Comments
 
LVL 23

Expert Comment

by:apresto
ID: 17147515
Hi jackjohnson44,

what database are you using, if its sql server you can use @@Identity

if its access or mysql you might need to run a select to bring back the max(id) from the table

Apresto
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LVL 17

Expert Comment

by:ZeonFlash
ID: 17147705
Yes, you can use @@IDENTITY if you're INSERT will never fire any triggers.  It's actually safer to use SCOPE_IDENTITY(), because it will return the new PKID for that INSERT only.

You'll also probably have to use ExecuteScalar, instead of NonQuery:

        retValue = dataCommand.ExecuteScalar()

Aaaand finally, to bring it all together, the SQL statement would read something like this:

"insert into tests (description, offset) values('" & testName & "'," & offsetValue & ") SELECT SCOPE_IDENTITY()"
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LVL 23

Expert Comment

by:apresto
ID: 17147729
only use a ; between the 2 statements if its an ansi language

"insert into tests (description, offset) values('" & testName & "'," & offsetValue & "); SELECT SCOPE_IDENTITY()"
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Author Comment

by:jackjohnson44
ID: 17147833
I am using access
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LVL 17

Expert Comment

by:ZeonFlash
ID: 17147918
You should still be ok using @@IDENTITY in Access.  See this article for an example:  http://support.microsoft.com/default.aspx/kb/232144
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Author Comment

by:jackjohnson44
ID: 17147969
how do I use @@IDENTITY?

can you please post some code?
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LVL 14

Accepted Solution

by:
jake072 earned 500 total points
ID: 17148113

[After your update code]

Dim cmd As New OleDbCommand("SELECT @@IDENTITY", [YourConnection])
Dim lngID As Long = cmd.ExecuteScalar()

[Close your connection]

Jake
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