SQL Update Column By Adding A Number To Current Int

Question

Simple enough, I can\'t figure out how to add (that\'s +) an integer from a textbox to the integer in the SQL Field.

So for example, the SQL Field may have \'10\' in it

Answer 1

You have to use the correct sql:

Dim sql = "UPDATE PersonsA SET U_G_Studio=U_G_Studio + @ugpoints WHERE Members_ID=@recevierID"

Also use the correct type with AddWithValue:

Using cmd = New SqlCommand(sql, con)
    ' use the using-statement to dispose everything that implements IDisposable, so also the connection '
        cmd.Parameters.AddWithValue("@ugpoints", Int32.Parse(tranamount.Text)) 
    ' .... '
End Using

Answer 2

what about

cmd.Parameters.AddWithValue("@ugpoints",  (int)tranamount.Text) 
....
cmd = New SqlCommand("UPDATE PersonsA SET U_G_Studio= SET U_G_Studio + @ugpoints WHERE Members_ID=@recevierID", con)

edit1: STEVE WAS FASTER!

Answer 3

The SQL you want is:

"UPDATE PersonsA SET U_G_Studio= (U_G_Studio + @ugpoints) " & _
"WHERE Members_ID=@recevierID"

Answer 4

Take the current value of the U_G_Studio field, add the value of the parameter and reassign to U_G_Studio, but keep in mind that you need to pass the value as an integer because otherwise the AddWithValue will pass a string and you get conversion errors coming from the db.

    cmd = New SqlCommand("UPDATE PersonsA SET U_G_Studio=U_G_Studio + @ugpoints " & 
                         "WHERE Members_ID=@recevierID", con)
    cmd.Parameters.AddWithValue("@recevierID", tranmemberID.Text)
    cmd.Parameters.AddWithValue("@ugpoints", Convert.ToInt32(tranamount.Text))
    cmd.ExecuteNonQuery()