DataTable一点小操作

DataTable dtExcel = new ExcelHelper().ExcelImportToDataTable(ServerFilePath, version);

        IDictionary dic = new Dictionary<string, string>();
         //查询HareWare表信息
         DataTable dtHw = hardWare.GetAllHardWareList();

        foreach(DataRow dr in dtHw.Rows){
            if (dr["MAC1"] != "") 
            {
                dic.Add(dr["MAC1"].ToString(), dr["AssetID"].ToString());
            }
        }

        IList<string> ilToDel = new List<string>();
        //查询不匹配的MAC对应的信息
         foreach (DataRow dr in dtExcel.Rows)
        {
            if (dic.Contains(dr[0].ToString()))
            {
                //获取要删除的资产编号
                 string assetId = dic[dr[0].ToString()].ToString();
                ilToDel.Add(assetId);
            }

        }

        //查询硬件信息
         dtDB = new AMS_MAC().GetMACInfo();
        if (dtDB.Rows.Count > 0)
        {
            for (int k = 0; k < dtDB.Rows.Count; k++)
            {
                if (ilToDel.Contains(dtDB.Rows[k]["AssetID"].ToString()))
                {
                    dtDB.Rows[k].Delete();
                }
            }
        }
        dtDB.AcceptChanges();

DataTable增加一列并赋值：

DataTable dt = new ExcelHelper().ExcelImportToDataTable(ServerFilePath, version);
        //ds.Tables.Add(dt);
        Session["dtExcel"] = dt;
        //dt.Columns.Add("操作记录", Type.GetType("System.String"));
        //DataRow dr = dt.NewRow()
        //dt.Rows.Add(new object[] { "导入失败", "" });

        dt.Columns.Add("result", typeof(string));
        foreach (DataRow dr in dt.Rows)
        {
            if (InsertData(dt))
            {
                dr["result"] = "success";
            }
            else
            {
                dr["result"] = "failed";
            }
        }

/// <summary>
    /// DataTable内容存到数据库
    /// </summary>
    /// <returns></returns>
    protected bool InsertData(DataTable inputdt)
    {
        DataTable dtExcel = ((DataTable)Session["dtExcel"]).Copy();
        foreach (DataRow dr in dtExcel.Rows)
        {
            excel_report.excel_column1 = dr[0].ToString();
            excel_report.excel_column2 = dr[1].ToString();
        }
        if (excelReport.Add(excel_report))
        {
            return true;
        }
        else
        {
            return false;
        }