请问一下，返回本周星期几，的日期是多少，怎么写呢？秒结

[kangl_china]

比如：

输入 5，返回本周星期5，对应的日期！


马上给分！。。。。

[wuyi8808]

本周是指“周一到周日”，还是指“周日到周一”？
想返回“星期日”，是输入0，还是输入7？

[wuyi8808]

本周是指“周一到周日”，还是指“周日到周六”？

[kangl_china]

1，2，3，4，5，6，7

[wuyi8808]

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

[qqzeng-ip]

        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;
        }

[hhc123]

[Quote=引用 4 楼 wuyi8808 的回复:]
C# codeint input=5;
DateTime today= DateTime.Today;
DateTime yourdate= today.AddDays(input- (int)today.DayOfWeek);
[/Quote]
这个

[whowhen21]

[Quote=引用 4 楼 wuyi8808 的回复:]
C# codeint input=5;
DateTime today= DateTime.Today;
DateTime yourdate= today.AddDays(input- (int)today.DayOfWeek);
[/Quote]
这个可行。

[flyfly2008]

空军可行，`~~`

[liherun]

可以返回日期吗？空军老大的

[wuyq11]

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();
}

[wartim]

秒结是一种错觉

[lzsh0622]

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

[偶像-阿里巴巴-马云]

学习

[lzsh0622]

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"));
}