生成17位订单号代码,Asp.Net代码库,德仔网

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【Asp.Net】生成17位订单号

作者:汶妍 / 发布于2015/4/16/ 653


	/// <summary>
	 /// 生成订单号
	 /// </summary>
	 /// <returns></returns>
	 private string generateOid()
	 {
	 string oid;
	 //17位订单号
	 StringBuilder sbNumber = new StringBuilder();
	 sbNumber.Append(DateTime.Now.Year.ToString());//4
	 sbNumber.Append(DateTime.Now.Month.ToString().Length == 1 ? "0" + DateTime.Now.Month.ToString() : DateTime.Now.Month.ToString());//2
	 sbNumber.Append(DateTime.Now.Day.ToString().Length == 1 ? "0" + DateTime.Now.Day.ToString() : DateTime.Now.Day.ToString());//2
	 sbNumber.Append(DateTime.Now.Hour.ToString().Length == 1 ? "0" + DateTime.Now.Hour.ToString() : DateTime.Now.Hour.ToString());//2
	 sbNumber.Append(DateTime.Now.Minute.ToString().Length == 1 ? "0" + DateTime.Now.Minute.ToString() : DateTime.Now.Minute.ToString());//2
	 sbNumber.Append(DateTime.Now.Second.ToString().Length == 1 ? "0" + DateTime.Now.Second.ToString() : DateTime.Now.Second.ToString());//2
	 if (DateTime.Now.Millisecond.ToString().Length == 1)//3
	 {
	 sbNumber.Append("00" + DateTime.Now.Millisecond.ToString());
	 }
	 else if (DateTime.Now.Millisecond.ToString().Length == 2)
	 {
	 sbNumber.Append("0" + DateTime.Now.Millisecond.ToString());
	 }
	 else
	 {
	 sbNumber.Append(DateTime.Now.Millisecond.ToString());
	 }
	 //检查订单号是否在数据库中存在
	 while (TBHotel_order.ReturnOidCount(sbNumber.ToString()))//方法返回True，证明在数据库中存在。则重新排序
	 {
	 //若存在，重新对这个订单号排序
	 ArrayList repeatArr = new ArrayList();
	 for (int i = 0; i < sbNumber.ToString().Length; i++)
	 {
	 repeatArr.Add(sbNumber.ToString().Substring(i, 1));
	 }
	 //清空StringBuilder
	 sbNumber.Remove(0, sbNumber.Length);
	 Random re = new Random();
	 //对17位订单号随机排序
	 for (int i = 0; i < repeatArr.Count; i++)
	 {
	 int ex = re.Next(1, 17);
	 sbNumber.Append(repeatArr[ex].ToString());
	 }
	 }
	 //返回不重复的字串
	 oid = sbNumber.ToString();
	 return oid;
	

	 }

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　订单号　

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