util-判断当前年份所处的季度，并返回当前季度开始的月份

using System;

namespace Ylbtech.Model
{
    /// <summary>
    ///JiDuInfo 的摘要说明
    ///季度类
    /// </summary>
    public class JiDuInfo
    {
        /// <summary>
        /// 今年的第几季度
        /// </summary>
        public string JiDu { get; set; }
        /// <summary>
        /// 当前季度开始的第一个月份
        /// </summary>
        public string JiDuStartMonth { get; set; }

        public JiDuInfo()
        {
            //
            //TODO: 在此处添加构造函数逻辑
            //
        }
    }
}

using System;

using Ylbtech.Model;
namespace Ylbtech.Common
{
    /// <summary>
    ///JiDu 的摘要说明
    /// </summary>
    public class JiDu
    {
        /// <summary>
    ///JiDu 的摘要说明
    ///author:YuanBo
    ///date:21:09 2013/6/27
    /// </summary>
    public class JiDu
    {
        /// <summary>
        /// 判断当前是当年的第几季度
        /// </summary>
        /// <returns>第几季度，该季度开始的首月份</returns>
        public static JiDuInfo GetJiDuStartMonth()
        {
            JiDuInfo dal = new JiDuInfo();
            //一年四季
            string[] jiDuStr = new string[] { "01,02,03", "04,05,06", "07,08,09", "10,11,12" };
            string jiDuStartMonth = string.Empty; //当前季度开始月份

            string positionMonth = DateTime.Now.ToString("MM"); //当前月份
            #region 获取当前年度
            for (int i = 0; i < jiDuStr.Length; i++)
            {
                if (jiDuStr[i].IndexOf(positionMonth) != -1)
                {
                    dal.JiDu = (i + 1).ToString();
                    dal.JiDuStartMonth = (i * 3 + 1).ToString();
                }
            }
            #endregion

            return dal;
        }

        public JiDu()
        {
            //
            //TODO: 在此处添加构造函数逻辑
            //
        }
    }
}