protected void btnUp_Click(object sender, EventArgs e)
        {
            bool b = Upload(FileUpload1);
            if (!b)
            {
                return;
            }
            string name = FileUpload1.FileName;
            string filepath = Server.MapPath("~/upload/") + name;
            Pf.CheckTable(Ds, "datetable");
            Ds = Db.GotData1("select * from [" + Db.DtName(filepath).Rows[0][2].ToString() + "]", "datetable1", Ds, filepath);

            OleDbConnection conn = Db.OpenConn();
            OleDbCommand oledbInsertCommand = conn.CreateCommand();
            oledbInsertCommand.Transaction = conn.BeginTransaction();
            try
            {
                foreach (DataRow dr in Ds.Tables["datetable1"].Rows)
                {
                    ......
                    string insertsql = "insert into Fee
                    Db.UpdateData(insertsql);
                    LblMsg.Text = "费用数据导入成功！";
                }
                ();
            }
            catch (Exception e1)
            {
                myTrans.Rollback();
                LblMsg.Text = e1.Message + "请确认文件内容无误！";
            }
            finally
            {
                conn.Close();
                myTrans.Dispose();
                conn.Dispose();  
            }
        }

 以上是代码的主要部分，通过读excel中的数据逐行往数据库里插入数据，我这边想实现如果中途出现导入异常的话，能够回滚到导入前的状态，而不是仅导入部分数据。我的这个为什么不行呢，从网上找的方法！

帮顶    弱弱的问  能来个循环 + clear() 么.....