C# 如何控制DateTimePicker中的时间间隔

我在指定的表单上有一个日期时间选择器控件，如下所示：

dtpEntry.Format = DateTimePickerFormat.Custom;
dtpEntry.CustomFormat = "dd/MM/yyyy hh:mm:ss";
dtpEntry.ShowUpDown = true;

我希望用户只能以5分钟为增量增加或减少时间

---

有没有关于如何实现这一点的建议？

问题在于，上/下控件会自动增加或减少日期/时间选择器当前突出显示的部分（即年/月/日/小时/等）

---

您最好在日期/时间选择器旁边添加自己的上/下控件（可能是一个非常小的vscrollbar），并将其连接到距离日期/时间选择器值五分钟的递增/递减间隔。

可以通过观察ValueChanged事件并覆盖该值。此示例表单运行良好：

public partial class Form1 : Form {
    public Form1() {
        InitializeComponent();
        dateTimePicker1.CustomFormat = "dd/MM/yyyy hh:mm";
        dateTimePicker1.Format = DateTimePickerFormat.Custom;
        dateTimePicker1.ShowUpDown = true;
        dateTimePicker1.Value = DateTime.Now.Date.AddHours(DateTime.Now.Hour);
        mPrevDate = dateTimePicker1.Value;
        dateTimePicker1.ValueChanged += new EventHandler(dateTimePicker1_ValueChanged);
    }
    private DateTime mPrevDate;
    private bool mBusy;

    private void dateTimePicker1_ValueChanged(object sender, EventArgs e) {
        if (!mBusy) {
            mBusy = true;
            DateTime dt = dateTimePicker1.Value;
            if ((dt.Minute * 60 + dt.Second) % 300 != 0) {
                TimeSpan diff = dt - mPrevDate;
                if (diff.Ticks < 0) dateTimePicker1.Value = mPrevDate.AddMinutes(-5);
                else dateTimePicker1.Value = mPrevDate.AddMinutes(5);
            }
            mBusy = false;
        }
        mPrevDate = dateTimePicker1.Value;
    }
}

公共部分类表单1:表单{
公共表格1（）{
初始化组件（）；
dateTimePicker1.CustomFormat=“dd/MM/yyyy hh:MM”；
dateTimePicker1.Format=DateTimePickerPerformat.Custom；
dateTimePicker1.ShowUpDown=true；
dateTimePicker1.Value=DateTime.Now.Date.AddHours（DateTime.Now.Hour）；
mPrevDate=dateTimePicker1.Value；
dateTimePicker1.ValueChanged+=新事件处理程序（dateTimePicker1\u ValueChanged）；
}
私有日期时间mPrevDate；
私人厕所；
私有无效dateTimePicker1\u值已更改（对象发送方，事件参数e）{
如果（！mBusy）{
mBusy=true；
DateTime dt=dateTimePicker1.Value；
如果（（dt分*60+dt秒）%300！=0）{
TimeSpan diff=dt—mPrevDate；
如果（diff.Ticks<0）dateTimePicker1.Value=mPrevDate.AddMinutes（-5）；
else dateTimePicker1.Value=mPrevDate.AddMinutes（5）；
}
mBusy=假；
}
mPrevDate=dateTimePicker1.Value；
}
}

我知道这是一篇老文章，但我根据上面的答案为这个问题创建了一个更好的解决方案

在课堂上

private DateTime prevTimePicker1;
private bool navigatingDateTimePicker = false;

private DateTime prevTimePicker1;
private bool navigatingDateTimePicker = false;

在构造函数中

prevTimePicker1 = dateTimePickerStart.Value;
navigatingDateTimePicker = false;

prevTimePicker1 = dateTimePickerStart.Value;
navigatingDateTimePicker = false;

事件

private void dateTimePickerStart_ValueChanged(object sender, EventArgs e)
{
  if (!navigatingDateTimePicker) {
    /* First set the navigating flag to true so this method doesn't get called again while updating */
    navigatingDateTimePicker = true;

    /* using timespan because that's the only way I know how to round times well */
    TimeSpan tempTS = dateTimePickerStart.Value - dateTimePickerStart.Value.Date;
    TimeSpan roundedTimeSpan;

    if (dateTimePickerStart.Value > prevTimePicker1) {
      // round up to the nearest interval
      roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Ceiling(tempTS.TotalMinutes / 5));
      dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    } else {
      // round down to the nearest interval from prev
      roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Floor(tempTS.TotalMinutes / 5));
      dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    }
    navigatingDateTimePicker = false;
  }
  prevTimePicker1 = dateTimePickerStart.Value;
}

private void dateTimePickerStart_ValueChanged(object sender, EventArgs e)
{
  if (!navigatingDateTimePicker) {
    /* First set the navigating flag to true so this method doesn't get called again while updating */
    navigatingDateTimePicker = true;

    /* using timespan because that's the only way I know how to round times well */
    TimeSpan tempTS = dateTimePickerStart.Value - dateTimePickerStart.Value.Date;
    TimeSpan roundedTimeSpan;

    TimeSpan TDBug = dateTimePickerStart.Value - prevTimePicker1;
    if (TDBug.TotalMinutes == 59)
    {
        // first: if we are going back and skipping an hour it needs an adjustment
        roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Floor((tempTS.TotalMinutes - 60) / 5));
        dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    }
    else if (dateTimePickerStart.Value > prevTimePicker1)
    {
        // round up to the nearest interval
        roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Ceiling(tempTS.TotalMinutes / 5));
        dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    } else {
        // round down to the nearest interval from prev
        roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Floor(tempTS.TotalMinutes / 5));
        dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    }
    navigatingDateTimePicker = false;
  }
  prevTimePicker1 = dateTimePickerStart.Value;
}

---

您可以添加此代码

int minuteDiff = dtpJamAppointmentDokter.Value.Minute - prevTimePicker1.Minute;

if (minuteDiff == 59)
{
    dtpJamAppointmentDokter.Value =  dtpJamAppointmentDokter.Value.AddHours(-1);
}

以前

TimeSpan tempTS = dtpJamAppointmentDokter.Value - dtpJamAppointmentDokter.Value.Date;

---

我对SixOThree的答案做了一些修改，以消除Necromporph发现的bug。 应该是这样的：

在课堂上

private DateTime prevTimePicker1;
private bool navigatingDateTimePicker = false;

private DateTime prevTimePicker1;
private bool navigatingDateTimePicker = false;

在构造函数中

prevTimePicker1 = dateTimePickerStart.Value;
navigatingDateTimePicker = false;

prevTimePicker1 = dateTimePickerStart.Value;
navigatingDateTimePicker = false;

事件

private void dateTimePickerStart_ValueChanged(object sender, EventArgs e)
{
  if (!navigatingDateTimePicker) {
    /* First set the navigating flag to true so this method doesn't get called again while updating */
    navigatingDateTimePicker = true;

    /* using timespan because that's the only way I know how to round times well */
    TimeSpan tempTS = dateTimePickerStart.Value - dateTimePickerStart.Value.Date;
    TimeSpan roundedTimeSpan;

    if (dateTimePickerStart.Value > prevTimePicker1) {
      // round up to the nearest interval
      roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Ceiling(tempTS.TotalMinutes / 5));
      dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    } else {
      // round down to the nearest interval from prev
      roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Floor(tempTS.TotalMinutes / 5));
      dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    }
    navigatingDateTimePicker = false;
  }
  prevTimePicker1 = dateTimePickerStart.Value;
}

private void dateTimePickerStart_ValueChanged(object sender, EventArgs e)
{
  if (!navigatingDateTimePicker) {
    /* First set the navigating flag to true so this method doesn't get called again while updating */
    navigatingDateTimePicker = true;

    /* using timespan because that's the only way I know how to round times well */
    TimeSpan tempTS = dateTimePickerStart.Value - dateTimePickerStart.Value.Date;
    TimeSpan roundedTimeSpan;

    TimeSpan TDBug = dateTimePickerStart.Value - prevTimePicker1;
    if (TDBug.TotalMinutes == 59)
    {
        // first: if we are going back and skipping an hour it needs an adjustment
        roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Floor((tempTS.TotalMinutes - 60) / 5));
        dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    }
    else if (dateTimePickerStart.Value > prevTimePicker1)
    {
        // round up to the nearest interval
        roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Ceiling(tempTS.TotalMinutes / 5));
        dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    } else {
        // round down to the nearest interval from prev
        roundedTimeSpan = TimeSpan.FromMinutes(5 * Math.Floor(tempTS.TotalMinutes / 5));
        dateTimePickerStart.Value = dateTimePickerStart.Value.Date + roundedTimeSpan;
    }
    navigatingDateTimePicker = false;
  }
  prevTimePicker1 = dateTimePickerStart.Value;
}

或者干脆试试这个：

private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{
    if (this.dateTimePicker1.Value.Minute % 5 == 0)
        return;

    if (this.dateTimePicker1.Value.Minute % 5 == 1)
        this.dateTimePicker1.Value = this.dateTimePicker1.Value.AddMinutes(4);

    if (this.dateTimePicker1.Value.Minute % 5 == 4)
        this.dateTimePicker1.Value = this.dateTimePicker1.Value.AddMinutes(-4);
}

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我喜欢你的答案，但是我试着使用它，它在上升时非常有效，上升就像一个符咒。但是如果你一到“00”就往下走，它就会开始让时间变长。当我们说话的时候，我试图找出原因。一旦这一个bug被修复，我相信这将是一个非常棒的功能。它工作得非常好，我所需要做的就是调整

AddMinutes（）

中针对我的情况的值，它实际上就是即插即用。