string daiChuLBHs = String.Join(",", listSelectedXX.Select(p => p.I_DAICHULBH)); 讲list中指定字段用逗号关联成字符串
listSelectedXX.TrueForAll(p => p.S_CID == listSelectedXX[0].S_CID) ； 判断list中指定字段适合全部相同
