C#根据时间范围获取每月每周的分组

C#根据时间范围获取每月每周的分组

简介：C#根据时间范围获取每月每周的分组，这个时间范围可以是多年(2012.01.01-2015.12.31)，

也可以是一年中的几个月(2015.01.01-2015.12.31)，也可以是月个月中的几个星期

(2015.01.01-2015.01.21)，根据起始日期和结束日期，生成一个以起始日期和结束日期为

键值对的字典(Dictionary<string, string> )，时间仓促，初步写的算法，以后再优化，目前

唯一的一点小遗憾就是，月中每周键值对的排序问题。详细代码如下：

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根据时间范围获取每月每周的分组：

    /// <summary>
    /// 根据时间范围获取每月每周的分组
    /// </summary>
    /// <param name="strStartDate">起始时间</param>
    /// <param name="strEndDate">结束时间</param>
    /// <returns>返回每周起始结束键值对</returns>
    /// <remarks>创建人员(日期):★彭振★(150106 11:12)</remarks>
    public static Dictionary<string, string> GetGroupWeekByDateRange(string strStartDate, string strEndDate)
    {
      Dictionary<string, string> dict = new Dictionary<string, string>();

      DateTime dtStartDate = DateTime.Parse(strStartDate);
      DateTime dtEndDate = DateTime.Parse(strEndDate);

      //同年
      if (dtStartDate.Year == dtEndDate.Year)
      {
        GetGroupWeekByYear(dict, dtStartDate, dtEndDate);
      }
      //不同年
      else
      {
        int WhileCount = dtEndDate.Year - dtStartDate.Year;

        //某年一共有多少天
        int YearDay = DateTime.IsLeapYear(dtStartDate.Year) ? 366 : 365;
        DateTime dtTempStartDate = dtStartDate;

        DateTime dtTempEndDate = dtTempStartDate.AddDays(YearDay - dtTempStartDate.DayOfYear);

        //根据时间范围获取每月每周的分组
        GetGroupWeekByYear(dict, dtTempStartDate, dtTempEndDate);

        for (int i = 1; i < (WhileCount + 1); i++)
        {
          //某年某月一共有多少天
          YearDay = DateTime.IsLeapYear(dtTempStartDate.Year + 1) ? 366 : 365;
          dtTempStartDate = DateTime.Parse(DateTime.Parse((dtTempStartDate.Year + 1) + "." + dtTempStartDate.Month + "." + "01").ToString("yyyy.MM.dd"));
          dtTempEndDate = dtTempStartDate.AddDays(YearDay - dtTempStartDate.DayOfYear);

          //根据时间范围获取每月每周的分组
          GetGroupWeekByYear(dict, dtTempStartDate, dtTempEndDate);

        }
      }

      return dict;
    }

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根据时间范围(年)获取每月每周的分组：

    /// <summary>
    /// 根据时间范围(年)获取每月每周的分组
    /// </summary>
    /// <param name="dict">每周起始结束键值对</param>
    /// <param name="strStartDate">起始时间</param>
    /// <param name="strEndDate">结束时间</param>
    /// <remarks>创建人员(日期):★彭振★(150106 13:58)</remarks>
    public static void GetGroupWeekByYear(Dictionary<string, string> dict, DateTime dtStartDate, DateTime dtEndDate)
    {
      //不同月
      if ((dtEndDate.Month - dtStartDate.Month) >= 1)
      {
        int WhileCount = dtEndDate.Month - dtStartDate.Month;

        //某年某月一共有多少天
        int MonthDay = DateTime.DaysInMonth(dtStartDate.Year, dtStartDate.Month);
        DateTime dtTempStartDate = dtStartDate;
        DateTime dtTempEndDate = dtTempStartDate.AddDays(MonthDay - 1);

        //根据时间范围获取每月每周的分组
        GetGroupWeekByMonth(dict, dtTempStartDate, dtTempEndDate);

        for (int i = 1; i < (WhileCount + 1); i++)
        {
          //某年某月一共有多少天
          MonthDay = DateTime.DaysInMonth(dtTempStartDate.Year, dtTempStartDate.Month + 1);
          dtTempStartDate = DateTime.Parse(DateTime.Parse(dtTempStartDate.Year + "." + (dtTempStartDate.Month + 1) + "." + "01").ToString("yyyy.MM.dd"));
          dtTempEndDate = dtTempStartDate.AddDays(MonthDay - 1);

          //根据时间范围获取每月每周的分组
          GetGroupWeekByMonth(dict, dtTempStartDate, dtTempEndDate);

        }
      }
      //同月
      else
      {
        //根据时间范围获取每月每周的分组
        GetGroupWeekByMonth(dict, dtStartDate, dtEndDate);
      }
    }

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根据时间范围(月)获取每月每周的分组

    /// <summary>
    /// 根据时间范围(月)获取每月每周的分组
    /// </summary>
    /// <param name="dict">每周起始结束键值对</param>
    /// <param name="strStartDate">起始时间</param>
    /// <param name="strEndDate">结束时间</param>
    /// <remarks>创建人员(日期):★彭振★(150106 11:13)</remarks>
    public static void GetGroupWeekByMonth(Dictionary<string, string> dict, DateTime dtStartDate, DateTime dtEndDate)
    {
      //一周
      if ((dtEndDate.Day - dtStartDate.Day) < 7)
      {
        DayOfWeek day = dtStartDate.DayOfWeek;
        string dayString = day.ToString();

        DateTime dtTempStartDate = dtStartDate;
        DateTime dtTempEndDate = dtEndDate;
        DateTime dtTempDate = DateTime.Now;
        switch (dayString)
        {
          case "Monday":
            dict.Add(dtTempStartDate.ToString(), dtTempEndDate.ToString());
            break;
          case "Tuesday":
            dtTempDate = dtTempStartDate.Date.AddDays(+5);
            break;
          case "Wednesday":
            dtTempDate = dtTempStartDate.Date.AddDays(+4);
            break;
          case "Thursday":
            dtTempDate = dtTempStartDate.Date.AddDays(+3);
            break;
          case "Friday":
            dtTempDate = dtTempStartDate.Date.AddDays(+2);
            break;
          case "Saturday":
            dtTempDate = dtTempStartDate.Date.AddDays(+1);
            break;
          case "Sunday":
            dtTempDate = dtTempStartDate;
            break;
        }
        if (!dayString.Equals("Monday"))
        {
          dict.Add(dtTempStartDate.ToString(), dtTempDate.ToString());
          dtTempDate = dtTempDate.Date.AddDays(+1);
          if (DateTime.Compare(dtTempDate, dtEndDate) <= 0)
          {
            dict.Add(dtTempDate.ToString(), dtTempEndDate.ToString());
          }
        }
      }
      //多周
      else
      {
        DayOfWeek day = dtStartDate.DayOfWeek;
        string dayString = day.ToString();

        DateTime dtTempStartDate = dtStartDate;
        DateTime dtTempEndDate = dtEndDate;
        DateTime dtTempDate = DateTime.Now;

        #region 起始

        switch (dayString)
        {
          case "Monday":
            dtTempDate = dtTempStartDate.Date.AddDays(+6);
            break;
          case "Tuesday":
            dtTempDate = dtTempStartDate.Date.AddDays(+5);
            break;
          case "Wednesday":
            dtTempDate = dtTempStartDate.Date.AddDays(+4);
            break;
          case "Thursday":
            dtTempDate = dtTempStartDate.Date.AddDays(+3);
            break;
          case "Friday":
            dtTempDate = dtTempStartDate.Date.AddDays(+2);
            break;
          case "Saturday":
            dtTempDate = dtTempStartDate.Date.AddDays(+1);
            break;
          case "Sunday":
            dtTempDate = dtTempStartDate;
            break;
        }
        dict.Add(dtTempStartDate.ToString(), dtTempDate.ToString());

        dtTempStartDate = dtTempDate.Date.AddDays(+1);
        #endregion

        #region 结束

        day = dtEndDate.DayOfWeek;
        dayString = day.ToString();

        switch (dayString)
        {
          case "Monday":
            dtTempDate = dtEndDate;
            break;
          case "Tuesday":
            dtTempDate = dtEndDate.Date.AddDays(-1);
            break;
          case "Wednesday":
            dtTempDate = dtEndDate.Date.AddDays(-2);
            break;
          case "Thursday":
            dtTempDate = dtEndDate.Date.AddDays(-3);
            break;
          case "Friday":
            dtTempDate = dtEndDate.Date.AddDays(-4);
            break;
          case "Saturday":
            dtTempDate = dtEndDate.Date.AddDays(-5);
            break;
          case "Sunday":
            dtTempDate = dtEndDate.Date.AddDays(-6);
            break;
        }

        dict.Add(dtTempDate.ToString(), dtEndDate.ToString());

        dtTempEndDate = dtTempDate.Date.AddDays(-1);

        #endregion

        int WhileCount = ((dtTempEndDate.Day - dtTempStartDate.Day) / 7);
        if (WhileCount == 0)
        {
          dict.Add(dtTempStartDate.ToString(), dtTempEndDate.ToString());
        }
        else
        {
          for (int i = 0; i < (WhileCount + 1); i++)
          {
            dtTempDate = dtTempStartDate.Date.AddDays(+6);
            dict.Add(dtTempStartDate.ToString(), dtTempDate.ToString());
            dtTempStartDate = dtTempDate.Date.AddDays(+1); ;
          }
        }
      }
    }

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运用：

        //根据时间范围获取每月每周的分组
        Dictionary<string, string> dict = GetGroupWeekByDateRange("2012.01.01", "2015.12.31");
        Dictionary<string, string> dict = GetGroupWeekByDateRange("2015.01.01", "2015.12.31");
        Dictionary<string, string> dict = GetGroupWeekByDateRange("2015.01.01", "2015.01.21");