'怎么能让我在DATASET里加的记录不重复呢。重复的就不让他继续再增加一行?
                    ' Dim dr As DataRow
                    'dr = myDataTable.NewRow
                    'dr(0) = TextBox8.Text
                    'dr(1) = TextBox7.Text
                    'dr(2) = TextBox1.Text
 myDataTable.Rows.Add(dr)