I Am Using Vb 2008 I Have Generate Auto Genrate Num But I Have Some Problem

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if in database column is null how to genrate next auto genrate number i am using this code

VB

Dim cmd As New SqlCommand
      cmd.CommandType = CommandType.Text
      cmd.Connection = myconn
      cmd.CommandText = "select Max(token_no) from billentry"
      myconn.Open()
      Dim a As Integer = cmd.ExecuteScalar
      myconn.Close()
      TextBox1.Text = a + 1

Posted 27-May-14 23:45pm

tanugarg

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CPallini · Answer 1 · 2014-05-27T23:53:00

Solution 1

You should handle such an error condition. The way to do that is up to you: you may, for instance, use a default value or prompt a message box to the user.

Posted 27-May-14 23:53pm

CPallini