1.建一个窗体先
2.往上拖个label
3.再拖一个timer
4.双击timer
5.代码这样写
//给label赋值
DateTime fjtime = Convert.ToDateTime("2020-01-17 17:30:00");
DateTime xztime = Convert.ToDateTime((DateTime.Now).ToString("yyyy-MM-dd HH:mm:ss"));
string[] times = ((fjtime - xztime).ToString()).Split(':');
label1.Text = &