private void Form1_Load(object sender, EventArgs e)
{
string timeStr = DateTime.Now.ToLongTimeString().ToString();
string[] arr = timeStr.Split(':');
string str = (int.Parse(arr[0])).ToString("X") + " " + (int.Parse(arr[1])).ToString("X") + " " + (int.Parse(arr[2])).ToString("X");
label1.Text = str;
}
本文参考链接:https://www.cnblogs.com/xihong2014/p/11869736.html