.NET ------ 新增时编号获取当前日期自动赋值

如图：

在逻辑层进行调用

   /// <summary>
        /// 根据当天的序号,且是同一个前缀类型的单据进行编码，iFlag小于0时无Flag逻辑分隔
        /// </summary>
public string Get_Ex_Mark(string sFront, string sTableName, string sFiledName, string sQiyeGuid, int iFlag)
        {
            string sDate1 = DateTime.Now.ToString("yyyy-MM-dd 00:00:00");
            string sDate2 = DateTime.Now.ToString("yyyy-MM-dd 23:59:59");
            int ilen = sFront.Length;
            string strsql = "select max(cast(right(" + sFiledName + ",4) as int)) as iNumber from " + sTableName + " where PATINDEX('%[^0-9]%', right(" + sFiledName + ",4))=0 and QiyeGuid='" + sQiyeGuid + "' and CreateTime between '" + sDate1 + "' and '" + sDate2 + "' and left(" + sFiledName + "," + ilen + ")='" + sFront + "'";
            if (iFlag >= 0)
                strsql += " and Flag=" + iFlag;
            object obj = GetScalarByTx(strsql);
            if (obj == DBNull.Value)
            {
                return sFront + DateTime.Now.ToString("yyyyMMdd") + "0001";
            }
            else
            {
                int k = Convert.ToInt32(obj);
                k++;
                return sFront + DateTime.Now.ToString("yyyyMMdd") + k.ToString("0000");
            }
        }