Fetch auto incriment number from SQL server

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how to display auto increment number from sql server to vb.net windows form to text box/lsbel

What I have tried:

Dim Nextid As String
       Dim connection As New SqlConnection("server= madhuresh-pc; database= madhu; integrated security= true")
       connection.Open()

       Dim cmd As New SqlCommand("SELECT MAX(caseno+1) As 'NextId' FROM case1", connection)
       Nextid = cmd.ExecuteScalar()
       txtstation.Text = Nextid
       connection.Close()
   End Sub

Posted 20-Sep-17 5:12am

Member 13420068

Updated 20-Sep-17 5:40am

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ZurdoDev 20-Sep-17 11:17am

This code looks OK. What's the problem?

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OriginalGriff · Answer 1 · 2017-09-20T05:40:00

NO.
Do not do it, ever.

Why not? Because SQL Server is a multiuser environment, so the odds are very, very good that two or more users will end up with the same number, and that leads to serious problems with data integrity later.

You don't need to know what ID is being used until after the data is inserted - and that can be retrieved using SCOPE_IDENTITY (Transact-SQL) | Microsoft Docs[^] once you have inserted the row.
If you need an ID before you INSERT, then don't use an IDENTITY field - use a GUID and supply it from your presentation software rather than letting SQL look after it.