獲取兩個時間段之間的月份

/// <summary> 
    /// 獲取兩個時間段之間的月份 
    /// </summary> 
    /// <param name="startTime">開始月份</param> 
    /// <param name="endTime">結束月份</param> 
    /// <returns>月份字符串</returns> 
    public static string DateFiledMonths(string startTime, string endTime) 
    { 
        try 
        { 
            int index = 0; 
            string filed = string.Empty; 
            DateTime c1 = Convert.ToDateTime(Convert.ToDateTime(startTime).ToString("yyyy-MM")); 
            DateTime c2 = Convert.ToDateTime(Convert.ToDateTime(endTime).ToString("yyyy-MM")); 
            if (c1 > c2) 
            { 
                DateTime tmp = c1; 
                c1 = c2; 
                c2 = tmp; 
            } 
            while (c2 >= c1) 
            { 
                index++; 
                if (index > 12)  // 判斷是否大於12個月，如果大於，跳出 www.2cto.com
                    break; 
                filed += c1.ToString("yyyy-MM") + "|"; 
                c1 = c1.AddMonths(1); 
            } 
            return filed.TrimEnd('|'); 
        } 
        catch { return null; } 
    } 
 

摘自 朱金拖的專欄