asp.net Excel数据导入到数据库中

 protected void Btn_Import_Click(object sender, EventArgs e)
    {
        bool Result_Import = false;
        bool Result = false;
        Guid RanageID = Guid.NewGuid();
        string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower();
        if (FileUpload1.HasFile == false)
        {
            Function.AlertMsg("请您先选择后缀名为.xls或.xlsx的Excel文件", "SetForm.aspx?eid=" + EmployeeID);
        }
        else if (IsXls != ".xls" && IsXls != ".xlsx")
        {
            Function.AlertMsg("请选择后缀名为.xls或.xlsx的Excel文件", "SetForm.aspx?eid=" + EmployeeID);
        }
        else
        {
            string NewFileName = DateTime.Now.ToString("yyyyMMddhhmmss") + new Random().Next(99, 9999) + IsXls;//新文件名
            string NewPath = Server.MapPath("../attachment/Excel/") + NewFileName;//服务器保存路径
            FileUpload1.SaveAs(NewPath);
            DataSet Ds = ExcelDs(NewPath, NewFileName);
            DataRow[] Dr = Ds.Tables[0].Select();
            int RowsNum = Ds.Tables[0].Rows.Count;
            if (RowsNum.Equals(0))
            {
                Function.AlertMsg("该考核表为空表，请重新上传！", "SetForm.aspx?eid=" + EmployeeID);
            }
            else
            {
                string RanageIDs = "";

                #region
                for (int i = 0; i < Dr.Length; i++)//遍历Excel中的考核范围并添加到数据库
                {
                    string Ranage = Dr[i]["范围"].ToString();
                    string Weight = Dr[i]["权重"].ToString();
                    string Target = Dr[i]["考核指标"].ToString();
                    string Standard = Dr[i]["考核标准"].ToString();
                    string Remark = Dr[i]["描述"].ToString();

                    if (Ranage != "" && Weight != "")
                    {
                        RanageID = Guid.NewGuid();
                        opa_appraiseranage.ID = RanageID;
                        opa_appraiseranage.Ranage = Ranage;
                        opa_appraiseranage.Weight = int.Parse(Weight);
                        opa_appraiseranage.IsImport = true;
                        Result = OPA_AppraiseRanage.InsertRanageByEID(opa_appraiseranage);
                        if (Result)
                        {
                            RanageIDs = RanageIDs + "'" + RanageID + "',";
                            Result_Import = true;
                        }
                        else
                        {
                            Result_Import = false;
                            break;
                        }
                    }
                    if (Target != "")
                    {
                        opa_appraisetarget.RanageID = RanageID;
                        opa_appraisetarget.Target = Target;
                        opa_appraisetarget.Standard = Standard;
                        opa_appraisetarget.Remark = Remark;
                        opa_appraisetarget.IsImport = true;
                        bool resultTarget = OPA_AppraiseTarget.InsertTargetByEID(opa_appraisetarget);
                        if (resultTarget)
                        {
                            Result_Import = true;
                        }
                        else
                        {
                            Result_Import = false;
                            break;
                        }
                    }
                }//考核表录入循环完毕
                #endregion

                #region
                if (Result_Import)//表格导入成功，则删除该员工原有的考核表信息
                {
                    bool R = OPA_AppraiseRanage.DeleteBeforeRanageTargetAndUpdateIsImportByEID(opa_appraiseranage);
                    if (R)
                    {
                        Function.AlertMsg("考核表信息导入成功！", "PreviewAppraiseForm.aspx?eid=" + EmployeeID);
                        File.Delete(NewPath);//删除上传的考核表Excel文件
                    }
                    else
                    {
                        RanageIDs = RanageIDs.Substring(0, RanageIDs.Length - 1);
                        opa_appraiseranage.IDs = RanageIDs;
                        bool Result_D = OPA_AppraiseRanage.DeleteImportRanageTargetByRIDs(opa_appraiseranage);//根据考核范围ID和状态IsImport=1删除刚才导入的考核范围指标信息
                        if (Result_D)
                        {
                            Function.AlertMsg("考核表信息录入失败，数据已成功回滚，请检查数据后尝试重新录入！", "SetForm.aspx?eid=" + EmployeeID);
                        }
                        else
                        {

                            Function.AlertMsg("考核表信息录入失败，数据回滚失败，请联系管理员！", "SetForm.aspx?eid=" + EmployeeID);
                        }
                    }

                }
#endregion
            }
        }
    }

 public DataSet ExcelDs(string FilenamePath, string Table)
    {
        string strConn = "Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source ='" + FilenamePath + "';Extended Properties='Excel 8.0'";
        OleDbConnection Odbconn = new OleDbConnection(strConn);
        OleDbDataAdapter Odda = new OleDbDataAdapter("select * from [Sheet1$]", Odbconn);
        DataSet Ds = new DataSet();
        Odda.Fill(Ds, Table);
        return Ds;
        
    }