C#提升管理员权限修改本地Windows系统时间
在桌面应用程序开发过程中，需要对C盘下进行文件操作或者系统参数进行设置，例如在没有外网的情况下局域网内部自己的机制进行时间同步校准，这是没有管理员权限便无法进行设置。
1. 首先需要获得校准时间，两种方式：
通过可上网的电脑进行外部获取当前时间。
通过NTP实现
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//NTP消息大小摘要是16字节 (RFC 2030)byte[] ntpData = new byte[48];//设置跳跃指示器、版本号和模式值// LI = 0 (no warning), VN = 3 (IPv4 only), Mode = 3 (Client Mode)ntpData[0] = 0x1B; IPAddress ip = iPAddress;// NTP服务给UDP分配的端口号是123IPEndPoint ipEndPoint = new IPEndPoint(ip, 123);// 使用UTP进行通讯Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);socket.Connect(ipEndPoint);socket.ReceiveTimeout = 3000;socket.Send(ntpData);socket.Receive(ntpData);socket?.Close();socket?.Dispose(); |
程序手动输入。
2. 转换为本地时间
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//传输时间戳字段偏移量，以64位时间戳格式，应答离开客户端服务器的时间const byte serverReplyTime = 40;// 获得秒的部分ulong intPart = BitConverter.ToUInt32(ntpData, serverReplyTime);//获取秒的部分ulong fractPart = BitConverter.ToUInt32(ntpData, serverReplyTime + 4);//由big-endian 到 little-endian的转换intPart = swapEndian(intPart);fractPart = swapEndian(fractPart);ulong milliseconds = (intPart * 1000) + ((fractPart * 1000) / 0x100000000UL);// UTC时间DateTime webTime = (new DateTime(1900, 1, 1, 0, 0, 0, DateTimeKind.Utc)).AddMilliseconds(milliseconds);//本地时间DateTime dt = webTime.ToLocalTime(); |
3. 获取当前是否是管理员
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public static bool IsAdministrator() { WindowsIdentity identity = WindowsIdentity.GetCurrent(); WindowsPrincipal principal = new WindowsPrincipal(identity); return principal.IsInRole(WindowsBuiltInRole.Administrator); } |
4. 引入dll
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[DllImport("kernel32.dll")]private static extern bool SetLocalTime(ref Systemtime time);//转化后的时间进行本地设置，并返回成功与否bool isSuccess = SetLocalDateTime(dt); |
5. 提升权限
如果程序不是管理员身份运行则不可以设置时间
引入引用程序清单文件（app.manifest），步骤：添加新建项->选择‘应用程序清单文件（仅限windows）'
引入后再文件中出现app.manifest文件
| Value | Description | Comment |
|---|---|---|
| asInvoker | The application runs with the same access token as the parent process. | Recommended for standard user applications. Do refractoring with internal elevation points, as per the guidance provided earlier in this document. |
| highestAvailable | The application runs with the highest privileges the current user can obtain. | Recommended for mixed-mode applications. Plan to refractor the application in a future release. |
| requireAdministrator | The application runs only for administrators and requires that the application be launched with the full access token of an administrator. | Recommended for administrator only applications. Internal elevation points |
默认权限：
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<requestedExecutionLevel level="asInvoker " uiAccess="false" /> |
asInvoker 表示当前用户本应该具有的权限
highestAvailable 表示提升当前用户最高权限
requireAdministrator 表示提升为管理员权限
修改权限：
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<requestedExecutionLevel level="requireAdministrator" uiAccess="false" /> |
6. 重新生成程序
源码
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using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Net.Sockets;using System.Runtime.InteropServices;using System.Text;using System.Threading.Tasks;namespace WindowsFormsApp1{ public class DateTimeSynchronization { [StructLayout(LayoutKind.Sequential)] private struct Systemtime { public short year; public short month; public short dayOfWeek; public short day; public short hour; public short minute; public short second; public short milliseconds; } [DllImport("kernel32.dll")] private static extern bool SetLocalTime(ref Systemtime time); private static uint swapEndian(ulong x) { return (uint)(((x & 0x000000ff) << 24) + ((x & 0x0000ff00) << 8) + ((x & 0x00ff0000) >> 8) + ((x & 0xff000000) >> 24)); } /// <summary> /// 设置系统时间 /// </summary> /// <param name="dt">需要设置的时间</param> /// <returns>返回系统时间设置状态，true为成功，false为失败</returns> private static bool SetLocalDateTime(DateTime dt) { Systemtime st; st.year = (short)dt.Year; st.month = (short)dt.Month; st.dayOfWeek = (short)dt.DayOfWeek; st.day = (short)dt.Day; st.hour = (short)dt.Hour; st.minute = (short)dt.Minute; st.second = (short)dt.Second; st.milliseconds = (short)dt.Millisecond; bool rt = SetLocalTime(ref st); return rt; } private static IPAddress iPAddress = null; public static bool Synchronization(string host, out DateTime syncDateTime, out string message) { syncDateTime = DateTime.Now; try { message = ""; if (iPAddress == null) { var iphostinfo = Dns.GetHostEntry(host); var ntpServer = iphostinfo.AddressList[0]; iPAddress = ntpServer; } DateTime dtStart = DateTime.Now; //NTP消息大小摘要是16字节 (RFC 2030) byte[] ntpData = new byte[48]; //设置跳跃指示器、版本号和模式值 // LI = 0 (no warning), VN = 3 (IPv4 only), Mode = 3 (Client Mode) ntpData[0] = 0x1B; IPAddress ip = iPAddress; // NTP服务给UDP分配的端口号是123 IPEndPoint ipEndPoint = new IPEndPoint(ip, 123); // 使用UTP进行通讯 Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); socket.Connect(ipEndPoint); socket.ReceiveTimeout = 3000; socket.Send(ntpData); socket.Receive(ntpData); socket?.Close(); socket?.Dispose(); DateTime dtEnd = DateTime.Now; //传输时间戳字段偏移量，以64位时间戳格式，应答离开客户端服务器的时间 const byte serverReplyTime = 40; // 获得秒的部分 ulong intPart = BitConverter.ToUInt32(ntpData, serverReplyTime); //获取秒的部分 ulong fractPart = BitConverter.ToUInt32(ntpData, serverReplyTime + 4); //由big-endian 到 little-endian的转换 intPart = swapEndian(intPart); fractPart = swapEndian(fractPart); ulong milliseconds = (intPart * 1000) + ((fractPart * 1000) / 0x100000000UL); // UTC时间 DateTime webTime = (new DateTime(1900, 1, 1, 0, 0, 0, DateTimeKind.Utc)).AddMilliseconds(milliseconds); //本地时间 DateTime dt = webTime.ToLocalTime(); bool isSuccess = SetLocalDateTime(dt); syncDateTime = dt; } catch (Exception ex) { message = ex.Message; return false; } return true; } }} |
以上就是如何使用C#修改本地Windows系统时间的详细内容，更多关于c#修改系统时间的资料请关注服务器之家其它相关文章！
原文链接：https://www.cnblogs.com/MarkYUN/p/14282435.html
