如何获取时间

[w331264637]

如何获取本日（00:00:00-23:59:00),本周，本月

[diandian82]

System.DateTime.Now

[w331264637]

不是当时时间

[hitlcyu19]

http://blog.csdn.net/feiguohaixia/archive/2009/11/12/4802262.aspx
try

[wuyq11]

DateTime.Now;
DateTime beginDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
DateTime endDate = beginDate.AddMonths(1).AddDays(-1);

int week = (int)DateTime.Today.DayOfWeek;
if (week == 0) week = 7;
DateTime beginDate = DateTime.Today.AddDays(-(week - 1));
DateTime endDate = beginDate.AddDays(6);

[-过客-]

你要什么形式的结果，DateTime还是string

DateTime dt = DateTime.Now;  //当前时间
 
int dayOfWeek = Convert.ToInt32(dt.DayOfWeek.ToString("d"));

DateTime startWeek = dt.AddDays(1-((dayOfWeek == 0)?7:dayOfWeek));   //本周周一
DateTime endWeek = startWeek.AddDays(6);  //本周周日

 DateTime startMonth = dt.AddDays(1 - dt.Day);  //本月月初
DateTime endMonth = startMonth.AddMonths(1).AddDays(-1);  //本月月末

[chen8410]

不管本日、本周还是本月，都应该是一个时间段，即有begintime和endtime

protected void Button1_Click(object sender, EventArgs e)
    {
        string beginTime="",endTime=""; 
        switch (RadioButtonList1.SelectedValue) 
        { 
            //本日时间是从当天00:00:00到23:59:59; 
            case "本日":
                beginTime = DateTime.Now.ToString("d") + " 00:00:00"; 
                endTime = DateTime.Now.ToString("d")+" 23:59:59";
                break;                
            //获取本周时间段,嵌套一个switch语句块,得到本周星期一0点到星期天23点的时间段; 
            case "本周": 
            switch (DateTime.Now.DayOfWeek) //
            {      /*星期一*/
                case DayOfWeek.Monday:
                    beginTime = DateTime.Now.ToString("d") + " 00:00:00"; 
                    endTime = DateTime.Now.AddDays(6).ToString("d") + " 23:59:59"; 
                    break;
                /*星期二*/
                case DayOfWeek.Tuesday:
                    beginTime = DateTime.Now.AddDays(-1).ToString("d") + " 00:00:00";
                    endTime = DateTime.Now.AddDays(5).ToString("d") + " 23:59:59";
                    break;
                /*星期三*/
                case DayOfWeek.Wednesday:
                    beginTime = DateTime.Now.AddDays(-2).ToString("d") + " 00:00:00";
                    endTime = DateTime.Now.AddDays(4).ToString("d") + " 23:59:59"; 
                    break;
                //后面周4到周日根据上面计算即可
            } break;
            //获取本月时间段,开始时间是本月1号,而下个月1号减去1天就是本月最后一天;
            case "本月":
                beginTime = DateTime.Now.ToString("yyyy-MM") + "-01 00:00:00";
                endTime = DateTime.Parse(DateTime.Now.AddMonths(1).ToString("yyyy-MM") + "-01 00:00:00").AddDays(-1).ToString("d")+" 23:59:59";
                break; 
        }        Response.Write("选择的时间段是:" + beginTime + "至" + endTime);//此时beginTime和endTime还是string类型,转换成DateTime类型传值到数据库即可;
    }

[wrq147]

使用DateTime的ToString转换为指定格式的日期格式

[自由_]

学习

[w331264637]

谢谢

[jenny0810]

[Quote=引用 6 楼 chen8410 的回复:]
不管本日、本周还是本月，都应该是一个时间段，即有begintime和endtime

C# codeprotectedvoid Button1_Click(object sender, EventArgs e)
{string beginTime="",endTime="";switch (RadioButtonList1.SelectedValue)
{//本日时间是从当天00:00:00到23:59:59;case"本日":
beginTime= DateTime.Now.ToString("d")+" 00:00:00";
endTime= DateTime.Now.ToString("d")+" 23:59:59";break;//获取本周时间段,嵌套一个switch语句块,得到本周星期一0点到星期天23点的时间段;case"本周":switch (DateTime.Now.DayOfWeek)// {/*星期一*/case DayOfWeek.Monday:
beginTime= DateTime.Now.ToString("d")+" 00:00:00";
endTime= DateTime.Now.AddDays(6).ToString("d")+" 23:59:59";break;/*星期二*/case DayOfWeek.Tuesday:
beginTime= DateTime.Now.AddDays(-1).ToString("d")+" 00:00:00";
endTime= DateTime.Now.AddDays(5).ToString("d")+" 23:59:59";break;/*星期三*/case DayOfWeek.Wednesday:
beginTime= DateTime.Now.AddDays(-2).ToString("d")+" 00:00:00";
endTime= DateTime.Now.AddDays(4).ToString("d")+" 23:59:59";break;//后面周4到周日根据上面计算即可 }break;//获取本月时间段,开始时间是本月1号,而下个月1号减去1天就是本月最后一天;case"本月":
beginTime= DateTime.Now.ToString("yyyy-MM")+"-01 00:00:00";
endTime= DateTime.Parse(DateTime.Now.AddMonths(1).ToString("yyyy-MM")+"-01 00:00:00").AddDays(-1).ToString("d")+" 23:59:59";break;
} Response.Write("选择的时间段是:"+ beginTime+"至"+ endTime);//此时beginTime和endTime还是string类型,转换成DateTime类型传值到数据库即可; }
[/Quote]学习

[warrior9413]

顶了
上面说的都不错，
我也没什么说的了

[meditatorx]

DateTime.Now; 
DateTime beginDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1); 
DateTime endDate = beginDate.AddMonths(1).AddDays(-1); 

int week = (int)DateTime.Today.DayOfWeek; 
if (week == 0) week = 7; 
DateTime  beginDate = DateTime.Today.AddDays(-(week - 1)); 
DateTime  endDate = beginDate.AddDays(6);

[liuyjcel]

[Quote=引用 4 楼 wuyq11 的回复:]
DateTime.Now;
DateTime beginDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
DateTime endDate = beginDate.AddMonths(1).AddDays(-1);

int week = (int)DateTime.Today.DayOfWeek;
if (week == 0) week = 7;
DateTime  beginDate = DateTime.Today.AddDays(-(week - 1));
DateTime  endDate = beginDate.AddDays(6);
[/Quote]

正解！

[cfesc9]

[Quote=引用 4 楼 wuyq11 的回复:]
DateTime.Now;
DateTime beginDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
DateTime endDate = beginDate.AddMonths(1).AddDays(-1);

int week = (int)DateTime.Today.DayOfWeek;
if (week == 0) week = 7;
DateTime  beginDate = DateTime.Today.AddDays(-(week - 1));
DateTime  endDate = beginDate.AddDays(6);
[/Quote]
支持

[dzs121218525]

System.DateTime.Now

[lidanzi]

mark

[sunchen891229]

路过,学习了~

[zhanglong2009]

顶一下了