winform中datetimepicker|WinForm中DateTimePicker时间选择与设置为空值显示

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时间选择

DateTimePicker.ShowUpDown = true;
DateTimePicker.CustomFormat = "hh:mm";
DateTimePicker.Format = System.Windows.Forms.DateTimePickerFormat.Custom;

设置为空

dtp.Format = DateTimePickerFormat.Custom;
dtp.CustomFormat = " ";
dtp.Value = DateTime.FromOADate(0);
dtp.Text = string.Empty;

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