[tahaayyoub]

كود استعمله دائما مع مختلف الجداول فقط استدعيه بواسطة اسم الجدول والمفتاح 
مثال 
textbox1.text=GetAutoIncrement(customers, id)
 Public Function GetAutoIncrement(TableName, CoulmnName) As String
        Dim Dtmb As New DataTable
        Dim Klm As String = DateTime.Now.Year
        con.Close()
        Connect()
        con.Open()
        Dim vid As String = Nothing
        Dim cb1 As String = "SELECT top 1 " & CoulmnName & " FROM " & TableName & " order by " & CoulmnName & " desc"
        cmd = New SqlCommand(cb1)
        cmd.Connection = con
        Dim da As New System.Data.SqlClient.SqlDataAdapter
        da.SelectCommand = cmd
        da.Fill(Dtmb)
        con.Close()
        'التحقق من الشرط اسفله
        If Dtmb.Rows.Count > 0 Then '
            If Mid(Dtmb.Rows(0)(0).ToString(), 3, 2) > Mid(Year(Now), 3, 2) Then
                MsgBox("لا يمكنك الاضافة ")
            End If
        End If
        If Dtmb.Rows.Count = 0 Then
            If Date.Now.Month = 1 And Date.Now.Day = 1 Then
                Id_AutoIncrement = Mid(DateTime.Now.Year, 3, 2) & "/" & "0001"
            Else
                Id_AutoIncrement = Mid(DateTime.Now.Year, 3, 2) & "/" & "0001"
            End If
        Else
            Select Case (Mid(Year(Now), 3, 2)) ' سنة 
                Case > Mid(Dtmb.Rows(0)(0).ToString(), 1, 2) ' new year
                    If Date.Now.Month = 1 And Date.Now.Day = 1 Then
                        Id_AutoIncrement = Mid(DateTime.Now.Year, 3, 2) & "/" & "0001"
                    Else
                        Id_AutoIncrement = Mid(DateTime.Now.Year, 3, 2) & "/" & (Format(CDbl(Mid((Dtmb.Rows(0)(0)), 4, 4)) + 1, "0000"))
                    End If
                Case = Mid(Dtmb.Rows(0)(0).ToString(), 1, 2) 'تفس السنة
                    ' بداية السنة الجديدة مع  ترقيم مستخدم
                    If Date.Now.Month = 1 And Date.Now.Day = 1 And Mid(DateTime.Now.Year, 3, 2) & "/" & "0001" = Dtmb.Rows(0)(0).ToString() Then
                        Id_AutoIncrement = Mid(DateTime.Now.Year, 3, 2) & "/" & (Format(CDbl(Mid((Dtmb.Rows(0)(0)), 4, 4)) + 1, "0000"))
                        If Date.Now.Month = 1 And Date.Now.Day = 1 And Mid(DateTime.Now.Year, 3, 2) & "/" & "0001" <> Dtmb.Rows(0)(0).ToString() Then
                            Id_AutoIncrement = Mid(DateTime.Now.Year, 3, 2) & "/" & "0001"
                        End If
                    Else   'ليس بداية السنة والترقيم غير مستخدم
                        Id_AutoIncrement = Mid(DateTime.Now.Year, 3, 2) & "/" & (Format(CDbl(Mid((Dtmb.Rows(0)(0)), 4, 4)) + 1, "0000"))
                    End If
            End Select
            con.Close()
        End If
        Return Id_AutoIncrement
    End Function