dateTimePicker 获取自定义日期值
MessageBox.Show(dateTimePicker1.Value.ToString("yyyy-MM-dd 00:00:00"));
dateTimePicker1.Value.ToString("yyyy-MM-dd : HH:mm:ss")
MessageBox.Show(string.Format("{0:d}",dateTimePicker1.Value));
MessageBox.Show(dateTimePicker1.Value.ToString("yyyy-MM-dd 00:00:00"));
dateTimePicker1.Value.ToString("yyyy-MM-dd : HH:mm:ss")
MessageBox.Show(string.Format("{0:d}",dateTimePicker1.Value));