根据当前时间获取本周，下周，上周日期_.NET_编程开发_程序员俱乐部

实现点击按钮更改周，并获取本周，上周，下周对应的具体日期

借鉴了一些网上的方法

        /// <summary>
        /// 定义
        /// </summary>
         DateTime beginDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Monday, 0);//默认开始时间为本周周一
         DateTime endDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Sunday, 1);  //默认结束时间为本周周日，因为周日为每周第一天，所以本周周日为下周第一天

        /// <param name="dt">指定日期</param>
        /// <param name="weekday">需要获取周几</param>
        /// <param name="Number">控制获取哪周（-1：上周； 0：本周； 1：下周； 2：下下周）</param>
        private static DateTime getWeekUpOfDate(DateTime dt, DayOfWeek weekday, int Number)
        {
            int wd1 = (int)weekday;
            int wd2 = (int)dt.DayOfWeek;
            return wd2 == wd1 ? dt.AddDays(7 * Number) : dt.AddDays(7 * Number - wd2 + wd1);//周日为每周第一天
        }

 1  #region 更改周 按钮事件
 2         /// <summary>
 3         /// 本周
 4         /// </summary>
 5         private void btnThisWeek_Click(object sender, EventArgs e)
 6         {
 7             beginDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Monday, 0);//本周周一
 8             endDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Sunday, 1);  //下周周日
 9             DateBind();
10 11         }
12 
13         /// <summary>
14         /// 上周
15         /// </summary>
16         private void btnLastWeek_Click(object sender, EventArgs e)
17         {
18             beginDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Monday, -1);//上周周一
19             endDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Sunday, 0);   //本周周日
20             DateBind();
21 22         }
23 
24         /// <summary>
25         /// 下周
26         /// </summary>
27         private void btnNextWeek_Click(object sender, EventArgs e)
28         {
29             beginDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Monday, 1);//下周周一
30             endDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Sunday, 2);  //下下周周日
31             DateBind();
32 33         }
34         #endregion

 1         /// <summary>
 2         /// 绑定每天对应的日期
 3         /// </summary>
 4         private void DateBind()
 5         {
 6             DateTime beginTime = beginDate;
 7             DateTime endTime = endDate;
 8             DateTime[] times = GetDateTime(beginTime, endTime);//查出星期一到星期日的日期
 9             if (times.Length > 0)
10             {
11                  TextBox1.Text= times[0].ToShortDateString();  //星期一的日期
12                  TextBox2.Text = times[1].ToShortDateString();  //星期二的日期
13                  TextBox3.Text = times[2].ToShortDateString();  //星期三的日期
14                  TextBox4.Text = times[3].ToShortDateString();  //星期四的日期
15                  TextBox5.Text = times[4].ToShortDateString();  //星期五的日期
16                  TextBox6.Text = times[5].ToShortDateString();  //星期六的日期
17                  TextBox7.Text = times[6].ToShortDateString();  //星期日的日期
18             }
19 
20         }

 1         /// <summary>
 2         /// 计算每周每天对应的日期
 3         /// </summary>
 4         private DateTime[] GetDateTime(DateTime beginTime, DateTime endTime)
 5         {
 6             List<DateTime> timeList = new List<DateTime>();
 7             for (; beginTime <= endTime; beginTime = beginTime.AddDays(1))//周一到周日的日期
 8             {
 9                 timeList.Add(beginTime);
10 
11             }
12             DateTime[] times = timeList.ToArray();
13             return times;
14         }