#region ===================================生成编码=================================
private string getuser_number()
{
//套餐订单
string str = "HY" + DateTime.Now.ToString("yyyymmdd") + GetOrderNumber(6);
string strSql = "select id from dt_users where user_number='" + str + "' and datediff(dd,getdate(),reg_time)=0";
DataTable dt = DBUtility.DbHelperSQL.Query(strSql).Tables[0];
if (dt.Rows.Count > 0)
{
str = getuser_number();
}
return str;
}
#region *********************辅助方法*******************
/// <summary>
/// 根据日期和随机码生成订单号
/// </summary>
/// <returns></returns>
public static string GetOrderNumber(int len)
{
return Number(len, true).ToString();
}
/// <summary>
/// 生成随机数字
/// </summary>
/// <param name="length">生成长度</param>
/// <returns></returns>
public static string Number(int Length)
{
return Number(Length, false);
}
/// <summary>
/// 生成随机数字
/// </summary>
/// <param name="Length">生成长度</param>
/// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
/// <returns></returns>
public static string Number(int Length, bool Sleep)
{
if (Sleep)
System.Threading.Thread.Sleep(3);
string result = "";
System.Random random = new Random();
for (int i = 0; i < Length; i++)
{
result += random.Next(10).ToString();
}
return result;
}
#endregion
#endregion
C# 生成编码
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转载自blog.csdn.net/weixin_42413952/article/details/86664519
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