请问一下，返回本周星期几，的日期是多少，怎么写呢？秒结

Question

比如：输入 5，返回本周星期5，对应的日期！
马上给分！。

Answer 1

int input = 5;
DateTime today = DateTime.Today;
DateTime yourdate = today.AddDays(input - (int)today.DayOfWeek);

Answer 2

        switch (weekstr)
        {
            case "1": weekstr = "星期一"; break;
            case "2": weekstr = "星期二"; break;
            case "3": weekstr = "星期三"; break;
            case "4": weekstr = "星期四"; break;
            case "5": weekstr = "星期五"; break;
            case "6": weekstr = "星期六"; break;
            case "7": weekstr = "星期日"; break;
        }

Answer 3

  DateTime.Now.AddDays(Convert.ToDouble((0 - Convert.ToInt16(DateTime.Now.DayOfWeek)))).ToShortDateString();
 DateTime.Now.AddDays(Convert.ToDouble((6 - Convert.ToInt16(DateTime.Now.DayOfWeek)))).ToShortDateString();
  private string GetWeek(int week)
        {
            if (week == 0) return "星期一";
            if (week == 1) return "星期二";
            if (week == 2) return "星期三";
            if (week == 3) return "星期四";
            if (week == 4) return "星期五";
            if (week == 5) return "星期六";
            if (week == 6) return "星期日";            return "";        }       private int GetInt(string week)
       {
           if (week == "Monday") return 1;
           if (week == "Tuesday") return 2;
           if (week == "Wednesday") return 3;
           if (week == "Thursday") return 4;
           if (week == "Friday") return 5;
           if (week == "Saturday") return 6;
           if (week == "Sunday") return 7;
           return 0;
       }
        public void Change(string week, DateTime dt)
        {
            string _out = string.Empty;
            int k = GetInt(week)-1;
            for (int i = 0; i < 7; i++)
            {
                _out += dt.AddDays(-k + i).ToString("yyyy年MM月dd日") + GetWeek(i);            }
            Console.WriteLine(_out);
            Console.Read();
        }
    
    

Answer 4

DateTime dt5 = DateTime.Now.Date.AddDays(5 - (int)DateTime.Now.DayOfWeek);
MessageBox.Show(dt5.ToString("yyyy-MM-dd"));

Answer 5

public DateTime getDate(int dayOfWeek)
{
    DateTime dt5 = DateTime.Now.Date.AddDays(dayOfWeek - (int)DateTime.Now.DayOfWeek);
    return dt5;
}// 测试用例
private void button1_Click(object sender, EventArgs e)
{
    MessageBox.Show(getDate(5).ToString("yyyy-MM-dd"));
}