计时器不是用于获取当前时间。它用于在给定时间（或一次又一次地以给定间隔）触发动作。如果我正确地读了你的问题，你不需要计时器。



如果你想设置 DateTimePicker 到按下按钮的时间，设置其Value 属性：

The timer is not for getting the current time. It is for triggering actions at a given time (or at given intervals again and again). If I read your question correctly, you don't need the timer.

If you want to set the DateTimePicker to the time the button was pressed, set its Value property:

void button1_Click(object sender, EventArgs e)
{
    dateTimePicker1.Value = DateTime.Now;
}