仅从DateTime对象获取日期或时间

I have a DateTime instance that has a Date and a Time. How do I extract only the date or only the time?

我有一个具有日期和时间的DateTime实例。如何仅提取日期或仅提取时间？

5 个解决方案

#1

var day = value.Date; // a DateTime that will just be whole days
var time = value.TimeOfDay; // a TimeSpan that is the duration into the day

#2

You can also use DateTime.Now.ToString("yyyy-MM-dd") for the date, and DateTime.Now.ToString("hh:mm:ss") for the time.

您还可以使用DateTime.Now.ToString（“yyyy-MM-dd”）作为日期，使用DateTime.Now.ToString（“hh：mm：ss”）作为时间。

#3

You can use Instance.ToShortDateString() for the date,
and Instance.ToShortTimeString() for the time to get date and time from the same instance.

您可以使用Instance.ToShortDateString（）作为日期，使用Instance.ToShortTimeString（）获取来自同一实例的日期和时间。

#4

var currentDateTime = dateTime.Now();
var date=currentDateTime.Date;

#5

-1

Sometimes you want to have your GridView as simple as:

有时您希望GridView简单如下：

  <asp:GridView ID="grid" runat="server" />

You don't want to specify any BoundField, you just want to bind your grid to DataReader. The following code helped me to format DateTime in this situation.

您不想指定任何BoundField，只想将网格绑定到DataReader。以下代码帮助我在这种情况下格式化DateTime。

protected void Page_Load(object sender, EventArgs e)
{
  grid.RowDataBound += grid_RowDataBound;
  // Your DB access code here...
  // grid.DataSource = cmd.ExecuteReader(CommandBehavior.CloseConnection);
  // grid.DataBind();
}

void grid_RowDataBound(object sender, GridViewRowEventArgs e)
{
  if (e.Row.RowType != DataControlRowType.DataRow)
    return;
  var dt = (e.Row.DataItem as DbDataRecord).GetDateTime(4);
  e.Row.Cells[4].Text = dt.ToString("dd.MM.yyyy");
}

The results shown here. 仅从DateTime对象获取日期或时间

结果显示在这里。

#1

var day = value.Date; // a DateTime that will just be whole days
var time = value.TimeOfDay; // a TimeSpan that is the duration into the day

#2