aspx中的代码：
<asp:Label id="runtimeLabel" runat="server" CssClass="label" style="position:absolute" Text="" ></asp:Label>
C#中的代码是一个定时器赋值：
private void RuntimeShow(object source, System.Timers.ElapsedEventArgs e)
{
int SystemRunNum1 = SystemRunNum;
hour = SystemRunNum1 / 3600;
if (hour >= 24)
{
day = hour / 24;
}
SystemRunNum1 = SystemRunNum1 - day * 24 * 3600;
hour = SystemRunNum1 / 3600;
minute = SystemRunNum1 % 3600 % 3600 / 60;
second = SystemRunNum1 % 3600 % 3600 % 3600 % 60;
string content = "累计运行：" + day.ToString("D3") + "天" + hour.ToString("D2") + "时" + minute.ToString("D2") + "分" + second.ToString("D2") + "秒";
runtimeLabel.Text = content;
SystemRunNum++;
}
