960331 - 如何将datetimepicker限制为半小时？

问题描述：

在Windows应用程序表单中，我需要设置一个时间选择器。我想我可以在System.Windows.Forms.DateTimePicker或Telerik.WinControls.UI.RadDateTimePicker之间进行选择。它不能用于选择日期。它可以在24小时内使用。但是时间应该在半小时内对齐，如00：00,0：00,01：00等等。它不应该是这个。例如。 20:45或05:53是不可接受的。有没有选项可以将这样的控制限制在这些对齐的值上？

我尝试了什么：

它不适用。这不是一个错误。这是我需要的功能。

In a Windows application form, I need to put a time picker. I think I may select between System.Windows.Forms.DateTimePicker or Telerik.WinControls.UI.RadDateTimePicker. It's not to be used to select a date. It's to be used a time in a 24-hours. But the time should be aligned in half-an-hour, like 00:00, 00:30, 01:00 and so on. It should not be out of this. Eg. 20:45 or 05:53 are not acceptable. Is there an option to limit such a control to these aligned values?

What I have tried:

it's not applicable. it's not a bug. it's a feature i need.

答

请参阅 DateTimePicker类（System.Windows.Forms） [ ^ ]。

[edit]

根据上面链接中的备注设置属性以显示简单的向上时间控件，并将以下代码添加到 ValueChanged 事件处理程序：

See the Remarks section at DateTimePicker Class (System.Windows.Forms)[^].

[edit]
Set the properties according to the remarks in the link above to show a simple up down time control, and add the following code to the ValueChanged event handler:

DateTime dt = dateTimePicker1.Value;
int mins = dt.Minute;
if (mins == 1 || mins == 31)
{
    dt = dt.AddMinutes(29);
    dateTimePicker1.Value = dt;
}

每次按下向上按钮，这将增加30分钟的时间。我留给你添加下按钮的代码和小时的更改。

That will increase the time by 30 minutes every time the up button is pressed. I leave you to add the code for the down button and the change of hour.

960331 - 如何将datetimepicker限制为半小时？

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