Member Avatar for bosz015

hello experts..please help me..How can i solve this error...

       Using db As New DB_CARRENTALEntities1
        Dim x
        Dim a = db.tbl_customer.Where(Function(b) b.cardesc = "studnum").FirstOrDefault
        x = a.CustomerID + 1<<<<<(Object reference not set to an instance of an object.) how can i solve this error..

        Dim newstudnum As String = "104-" & Format(Now, "yyyy") & "-" & Format(x, "000#")
        TextBox1.Text = newstudnum

        Dim d = db.tbl_customer.Where(Function(f) f.cardesc = "studnum").FirstOrDefault
        Dim y As Integer

        y = x
        d.CustomerID = y


        db.SaveChanges()
        db.AcceptAllChanges()

        cmdID.Enabled = False
    End Using
  • 3 Contributors
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  • 54 Minutes Discussion Span
  • Latest Post Latest Post by Mitja Bonca
Member Avatar for Begginnerdev

What error is being thrown?

Member Avatar for Mitja Bonca

variable "a" seems to be null, or has no value at all.

commented: Good catch. +0
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