如圖：

在邏輯層進行呼叫

   /// <summary>
        /// 根據當天的序號,且是同一個字首型別的單據進行編碼，iFlag小於0時無Flag邏輯分隔
        /// </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");
            }
        }