通过ASP.Net确定Windows Server的运行时

Question

是否在任何ASP.net类中都有一个内置属性,用于确定运行Web应用程序的Web服务器的正常运行时间是什么？

突然出现在我脑海中的一些可能性:

• global.asax和Application_OnStart事件.获取时间戳并确定正常运行时间,我只是从DateTime.Now中减去它
• 编写一个Windows服务(自动启动),其唯一目的是在某处存储服务启动的值

但这两者都没有提供"内置"解决方案.我可能会在.net框架中监督一些事情吗？

Answer 1

要获得系统正常运行时间,请使用以下代码:

TimeSpan uptime;
using (var uptimeCounter = new PerformanceCounter("System", "System Up Time")) {
    uptimeCounter.NextValue();
    uptime = TimeSpan.FromSeconds(uptimeCounter.NextValue());
}

编辑:请注意,部分受信任的代码不能使用它.
你可以使用TimeSpan.FromMilliseconds(Environment.TickCount),但它会在两周后换行.

我在ASP.Net中写了一个服务器状态页面,显示服务器正常运行时间等.
这是整个页面:

<%@ Page Title="Server Stats" Language="C#" MasterPageFile="~/Admin.Master" AutoEventWireup="true"
    CodeFile="Stats.aspx.cs" Inherits="Stats" %>

<%@ Import Namespace="System.Diagnostics" %>
<%@ Import Namespace="Microsoft.VisualBasic.Devices" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
    <style type="text/css">
        body {
            background-color: #9DC0E4;
        }
        table.Details {
            width: 550px;
            margin-left: -275px;
            left: 50%;
            position: absolute;
        }
        table.Details tbody.Group {
            border-bottom: solid black 2px;
            margin-bottom: 15px;
        }
        table.Details th.Group {
            font-size: x-large;
            border-bottom: dashed 1px navy;
        }
        table.Details th.Name {
            text-align: left;
        }
        table.Details td.Value {
            text-align: right;
        }
    </style>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    <%
        var computer = new ComputerInfo();
        using (var iis = Process.GetCurrentProcess())
        using (var cpu = new PerformanceCounter("Processor", "% Processor Time", "_Total"))
        using (var uptime = new PerformanceCounter("System", "System Up Time")) {
            cpu.NextValue();
            uptime.NextValue();
    %>
    <table class="Details">
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">Environment</th>
            </tr>
            <tr>
                <th class="Name">Local server time</th>
                <td class="Value">
                    <%= DateTime.Now.ToString("F")%></td>
            </tr>
            <tr>
                <th class="Name">OS</th>
                <td class="Value">
                    <%= computer.OSFullName%><br />
                    <%= Environment.OSVersion.ToString()%></td>
            </tr>
            <tr>
                <th class="Name">Machine name</th>
                <td class="Value">
                    <%= Environment.MachineName%></td>
            </tr>
            <tr>
                <th class="Name">User name</th>
                <td class="Value">
                    <%= Environment.UserName%></td>
            </tr>
            <tr>
                <th class="Name">Windows domain</th>
                <td class="Value">
                    <%= Environment.UserDomainName%></td>
            </tr>
        </tbody>
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">IIS</th>
            </tr>
            <tr>
                <th class="Name">IIS Uptime</th>
                <td class="Value">
                    <%= (DateTime.Now- iis.StartTime).ToApproximateString()%></td>
            </tr>
            <tr>
                <th class="Name">Priority</th>
                <td class="Value">
                    <%= iis.PriorityClass%></td>
            </tr>
            <tr>
                <th class="Name">Physical Memory Used</th>
                <td class="Value">
                    <%= ToSizeString(iis.WorkingSet64)%></td>
            </tr>
            <tr>
                <th class="Name">Virtual Memory Used</th>
                <td class="Value">
                    <%= ToSizeString(iis.VirtualMemorySize64)%></td>
            </tr>
        </tbody>
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">Hardware</th>
            </tr>
            <tr>
                <th class="Name">Processors</th>
                <td class="Value">
                    <%= Environment.ProcessorCount.ToString()%></td>
            </tr>
            <tr>
                <th class="Name">Physical memory</th>
                <td class="Value">
                    <%= ToSizeString(computer.TotalPhysicalMemory)%></td>
            </tr>
            <tr>
                <th class="Name">Virtual memory</th>
                <td class="Value">
                    <%= ToSizeString(computer.TotalVirtualMemory)%></td>
            </tr>
        </tbody>
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">Performance</th>
            </tr>
            <tr>
                <th class="Name">Uptime</th>
                <td class="Value">
                    <%= TimeSpan.FromSeconds(uptime.NextValue()).ToApproximateString()%>
                </td>
            </tr>
            <tr>
                <th class="Name">CPU Usage</th>
                <td class="Value">
                    <%= (cpu.NextValue()/100).ToString("p")%>
                </td>
            </tr>
            <tr>
                <th class="Name">Physical memory free</th>
                <td class="Value">
                    <%= ToSizeString(computer.AvailablePhysicalMemory)%></td>
            </tr>
            <tr>
                <th class="Name">Virtual memory free</th>
                <td class="Value">
                    <%= ToSizeString(computer.AvailableVirtualMemory)%></td>
            </tr>
        </tbody>
    </table>
    <%} %>
</asp:Content>

ToSizeString在.cs文件中定义:

protected static string ToSizeString(double bytes) {
    var culture = CultureInfo.CurrentUICulture;
    const string format = "#,0.0";

    if (bytes < 1024)
        return bytes.ToString("#,0", culture);
    bytes /= 1024;
    if (bytes < 1024)
        return bytes.ToString(format, culture) + " KB";
    bytes /= 1024;
    if (bytes < 1024)
        return bytes.ToString(format, culture) + " MB";
    bytes /= 1024;
    if (bytes < 1024)
        return bytes.ToString(format, culture) + " GB";
    bytes /= 1024;
    return bytes.ToString(format, culture) + " TB";
}

ToApproximateString 是其他地方定义的扩展方法:

public static string ToApproximateString(this TimeSpan time) {
    if (time.TotalDays > 14)
        return ((int)(time.TotalDays / 7)).ToString("#,0.0") + " weeks";
    if (14 - time.TotalDays < .75)
        return "two weeks";
    if (time.TotalDays > 1)
        return time.TotalDays.ToString("#,0.0") + " days";
    else if (time.TotalHours > 1)
        return time.TotalHours.ToString("#,0.0") + " hours";
    else if (time.TotalMinutes > 1)
        return time.TotalMinutes.ToString("#,0.0") + " minutes";
    else
        return time.TotalSeconds.ToString("#,0.0") + " seconds";
}